How long is the flight from London to Washington, D.C. Dulles Intl Airport?

For as low as £391, United Airlines can have you in Washington, D.C. Dulles Intl Airport from London in 12h 40m. London and Washington, D.C. Dulles Intl Airport are separated by a distance of 3664 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

What are the cheapest airlines flying from London to Washington, D.C. Dulles Intl Airport round-trip?

Our cheapest airline available from London to Washington, D.C. Dulles Intl Airport is Delta. Our recent data shows that you can find tickets from as low as £185 on this airline. Additional options worth looking into are PLAY and Icelandair, starting at £241 and £341 round-trip. Users have found that Delta is 67% cheaper than the other options available to this destination.

What are the cheapest airlines to fly from London to Washington, D.C. Dulles Intl Airport one-way?

The cheapest airline one-way is TAP AIR PORTUGAL, with whom users have recently found tickets for as low as £379. However, be on the lookout for offers from Aer Lingus and British Airways, as they are both options that can get you from London to Washington, D.C. Dulles Intl Airport for a low price.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 66.0 - 102.0 inches per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 66.0 mm.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

What are the most popular routes from London to Washington, D.C. Dulles Intl Airport?

The most popular flight routes from London to Washington, D.C. Dulles Intl Airport are London Heathrow - Washington, D.C. Dulles Intl, London Gatwick - Washington, D.C. Dulles Intl and London City - Washington, D.C. Dulles Intl.

What are the cheapest flights from London to Washington, D.C. Dulles Intl Airport?

On average you can expect to pay £1,276 for a flight from London to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is £382 while the most popular route, (London Heathrow - Washington, D.C. Dulles Intl) is currently priced at £332.

What are the most reliable airlines from London to Washington, D.C. Dulles Intl Airport?

Before booking your flight to Washington, D.C. Dulles Intl Airport from London, check out the most reliable airlines to get you to your destination on time: KLM (90%), Air France (90%), Delta( 90%).

What are the most popular airlines that fly from London to Washington, D.C. Dulles Intl Airport?

The most popular airlines flying from London to Washington, D.C. Dulles Intl Airport are American Airlines, Air Canada and Air France. Something to consider prior to booking your flight.

Where are the most common stopover locations when flying from London to Washington, D.C. Dulles Intl Airport?

London to Washington, D.C. Dulles Intl Airport flights have a stopover in Dublin most often.

Where are the least popular stopover locations for London to Washington, D.C. Dulles Intl Airport flights?

London to Washington, D.C. Dulles Intl Airport flights have a stopover in Reykjavik least often.

What are some popular things to do or see while on a stopover in Dublin?

Bord Gáis Energy Theatre, 3Olympia Theatre, and Royal Dublin Society are currently the most popular points of interest in Dublin at the moment. Those on a stopover in Dublin interested in visiting Bord Gáis Energy Theatre, 3Olympia Theatre, or Royal Dublin Society can do so by traveling 5.7 mi, 5.7 mi, and 6.9 mi, respectively from Dublin. Those looking to explore during their stopover in Dublin can hire a car from Dublin for about £31 per day.

Can I find deals for flights from London to Dulles Intl that include hotel bookings?

Yes. In addition to deals on London to Dulles Intl flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from London to Dulles Intl?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Dulles Intl.

Can I find deals for business class flights from London to Dulles Intl?

Yes. Cheapflights offers flight deals from London to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£370+ Flights from London to Washington, D.C. Dulles Intl Airport

Q: How much does it cost for a return flight from London to Washington, D.C. Dulles Intl Airport?

Airfare is below average for this route at the moment. London to Washington, D.C. Dulles Intl Airport flights typically cost between £456 and £558 in October. The cheapest return flight price found within the last 3 days was £391 on Multiple Airlines (31 Oct-7 Nov).

Cheapflights Tip: The best prices from London to Washington, D.C. Dulles Intl are usually found in September or March, booked 64 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

Cheap flight deals from London to Dulles Intl

Round-trip from	£391
One-way from	£370
Popular in	July
Cheapest in	September
Average price	£490
Good round-trip deal	£467 or less
Good one-way deal	£468 or less

Austrian Airlines
31/10-7/11
1 total stop
20h 00m total
London to Washington, D.C.

Search Deals

10/10
3 total stops
51h 45m total
London to Washington, D.C.

Search Deals

Highest demand for flights based on searches. 11% potential increase in price (£51 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease (£8 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2025

Search Deals

Price to beat on a round-trip flight from London (LON) to Washington, D.C. Dulles Intl.

Search Deals

Price to beat on a one-way flight from London (LON) to Washington, D.C. Dulles Intl.

Search Deals

Find flight deals from London to Dulles Intl

Cheapest flights from London to Dulles Intl
Explore the most affordable flight options available from London to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2025.

Thu 25/908:40LHR - IAD

1 stop12h 35mUnited Airlines

Thu 2/1018:40IAD - LHR

Nonstop7h 15mUnited Airlines

Deal found 16/9£391

Thu 2/1006:50LHR - IAD

2 stops14h 20mAir Canada

Mon 6/1015:36IAD - LHR

1 stop11h 59mAir Canada

Deal found 17/9£392

Thu 23/1008:45LTN - IAD

1 stop15h 10mMultiple Airlines

Sun 26/1018:05IAD - LTN

1 stop10h 50mMultiple Airlines

Deal found 17/9£392

Thu 13/1121:20STN - IAD

2 stops26h 10mMultiple Airlines

Sun 30/1119:40IAD - STN

2 stops20h 15mMultiple Airlines

Deal found 16/9£392

Thu 25/908:40LHR - IAD

1 stop12h 35mUnited Airlines

Sun 28/918:40IAD - LHR

Nonstop7h 15mUnited Airlines

Deal found 17/9£393

Sun 7/1210:40LGW - IAD

1 stop15h 20mTAP AIR PORTUGAL

Sun 14/1222:30IAD - LGW

1 stop12h 15mTAP AIR PORTUGAL

Deal found 17/9£393

Thu 6/1119:25LHR - IAD

1 stop24h 15mAustrian Airlines

Wed 12/1122:15IAD - LHR

Nonstop7h 35mAustrian Airlines

Deal found 16/9£393

Fri 28/1109:00LHR - IAD

1 stop12h 40mUnited Airlines

Wed 25/217:25IAD - LHR

1 stop14h 35mUnited Airlines

Deal found 17/9£394

Thu 27/1109:00LTN - IAD

1 stop11h 35mMultiple Airlines

Sun 30/1121:00IAD - LTN

1 stop20h 00mMultiple Airlines

Deal found 17/9£394

Sun 7/1210:40LGW - IAD

1 stop15h 20mTAP AIR PORTUGAL

Sat 13/1217:30IAD - LGW

1 stop11h 20mTAP AIR PORTUGAL

Deal found 17/9£394

Thu 27/1106:30STN - IAD

1 stop14h 05mMultiple Airlines

Sun 30/1117:05IAD - STN

1 stop11h 45mMultiple Airlines

Deal found 17/9£394

Tue 23/908:30LHR - IAD

1 stop11h 45mUnited Airlines

Fri 3/1018:40IAD - LHR

Nonstop7h 15mUnited Airlines

Deal found 16/9£396

Best flights from London to Dulles Intl
Discover carefully curated flight deals from London to Dulles Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 September 2025.

Fri 31/1009:00LHR - IAD

1 stop12h 40mMultiple Airlines

Fri 7/1118:20IAD - LHR

Nonstop7h 20mMultiple Airlines

Deal found 16/9£391

Sun 1/209:00LHR - IAD

1 stop12h 40mUnited Airlines

Mon 9/222:15IAD - LHR

Nonstop7h 35mUnited Airlines

Deal found 16/9£391

Thu 30/1006:00LHR - IAD

1 stop13h 40mAustrian Airlines

Wed 12/1118:20IAD - LHR

Nonstop7h 20mAustrian Airlines

Deal found 15/9£393

Mon 12/106:00LHR - IAD

1 stop14h 30mSWISS

Thu 15/120:30IAD - LHR

1 stop11h 30mSWISS

Deal found 17/9£394

Thu 2/1015:40LGW - IAD

1 stop32h 40mIcelandair

Tue 7/1020:30IAD - LGW

1 stop13h 10mIcelandair

Deal found 17/9£404

Fri 31/1008:40LCY - IAD

1 stop12h 25mKLM

Wed 5/1118:05IAD - LCY

1 stop9h 45mKLM

Deal found 15/9£453

Thu 6/1110:00LCY - IAD

1 stop11h 05mVirgin Atlantic

Wed 12/1112:11IAD - LCY

2 stops15h 39mVirgin Atlantic

Deal found 15/9£454

Tue 25/1121:20LGW - IAD

2 stops28h 40mTAP AIR PORTUGAL

Sun 30/1122:30IAD - LGW

1 stop12h 15mTAP AIR PORTUGAL

Deal found 17/9£472

Fri 28/1109:00LHR - IAD

1 stop12h 40mUnited Airlines

Fri 12/1206:00IAD - LHR

2 stops20h 10mUnited Airlines

Deal found 16/9£391

Thu 13/1121:20STN - IAD

2 stops26h 10mMultiple Airlines

Sun 30/1119:40IAD - STN

2 stops20h 15mMultiple Airlines

Deal found 16/9£392

Thu 6/1114:50LHR - IAD

1 stop28h 50mAustrian Airlines

Wed 12/1118:20IAD - LHR

Nonstop7h 20mAustrian Airlines

Deal found 16/9£393

Fri 3/1015:40LGW - IAD

1 stop11h 30mIcelandair

Sun 5/1023:15IAD - LGW

1 stop10h 25mIcelandair

Deal found 17/9£407

Thu 13/1119:10LCY - IAD

1 stop25h 20mSWISS

Mon 17/1117:25IAD - LCY

1 stop14h 25mSWISS

Deal found 15/9£410

Fri 7/1109:00LHR - IAD

1 stop12h 40mUnited Airlines

Mon 10/1108:30IAD - LHR

2 stops17h 40mUnited Airlines

Deal found 17/9£393

Mon 2/314:50LHR - IAD

1 stop28h 50mAustrian Airlines

Tue 10/323:15IAD - LHR

Nonstop7h 35mAustrian Airlines

Deal found 15/9£393

Fri 31/1013:05LTN - IAD

2 stops32h 35mMultiple Airlines

Fri 7/1116:25IAD - LTN

2 stops18h 00mMultiple Airlines

Deal found 16/9£408

Fri 31/1019:20LCY - IAD

1 stop24h 15mSWISS

Fri 7/1117:25IAD - LCY

1 stop13h 15mSWISS

Deal found 16/9£411

Thu 30/1010:00LCY - IAD

1 stop11h 05mVirgin Atlantic

Wed 12/1112:11IAD - LCY

2 stops14h 04mVirgin Atlantic

Deal found 15/9£454

Thu 4/1210:10LGW - IAD

2 stops39h 50mTAP AIR PORTUGAL

Sun 14/1222:30IAD - LGW

1 stop12h 15mTAP AIR PORTUGAL

Deal found 16/9£474

Mon 10/1113:45LHR - IAD

1 stop31h 55mUnited Airlines

Sun 23/1117:33IAD - LHR

1 stop10h 37mUnited Airlines

Deal found 17/9£393

Sat 22/1121:00STN - IAD

2 stops26h 30mMultiple Airlines

Sun 30/1119:40IAD - STN

2 stops20h 15mMultiple Airlines

Deal found 17/9£408

Fri 3/1019:30LCY - IAD

1 stop25h 45mSWISS

Mon 6/1020:45IAD - LCY

1 stop10h 45mSWISS

Deal found 15/9£426

Thu 20/1110:10LGW - IAD

2 stops39h 50mTAP AIR PORTUGAL

Sat 6/1217:30IAD - LGW

1 stop11h 20mTAP AIR PORTUGAL

Deal found 16/9£474

Thu 2/1009:30LHR - IAD

1 stop11h 20mUnited Airlines

Tue 7/1018:40IAD - LHR

Nonstop7h 15mUnited Airlines

Deal found 16/9£395

Thu 16/1012:35LTN - IAD

2 stops32h 40mMultiple Airlines

Sun 19/1020:45IAD - LTN

2 stops19h 45mMultiple Airlines

Deal found 16/9£410

Mon 20/1015:40LGW - IAD

1 stop32h 40mIcelandair

Mon 10/1119:40IAD - LGW

1 stop10h 15mIcelandair

Deal found 17/9£500

Thu 6/1118:40LGW - IAD

2 stops24h 55mSWISS

Wed 12/1117:25IAD - LGW

1 stop19h 25mSWISS

Deal found 17/9£431

Thu 2/1009:30LHR - IAD

1 stop11h 20mUnited Airlines

Sun 7/1218:20IAD - LHR

Nonstop7h 20mUnited Airlines

Deal found 16/9£395

Fri 31/1006:30STN - IAD

1 stop14h 05mMultiple Airlines

Fri 7/1121:00IAD - STN

1 stop14h 35mMultiple Airlines

Deal found 16/9£413

Sun 23/1106:50LHR - IAD

1 stop12h 45mUnited Airlines

Tue 2/1218:20IAD - LHR

Nonstop7h 20mUnited Airlines

Deal found 15/9£396

Direct flights from London to Dulles Intl
Explore direct flight options from London to Dulles Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 18 September 2025.

Sat 1/1112:05LHR - IAD

Nonstop8h 30mLufthansa

Sat 8/1118:20IAD - LHR

Nonstop7h 20mLufthansa

Deal found 17/9£398

Thu 6/1112:10LHR - IAD

Nonstop8h 25mBritish Airways

Wed 12/1118:20IAD - LHR

Nonstop7h 10mBritish Airways

Deal found 16/9£399

Thu 20/1112:10LHR - IAD

Nonstop8h 25mBritish Airways

Sat 6/1218:20IAD - LHR

Nonstop7h 10mBritish Airways

Deal found 16/9£401

Thu 25/912:35LHR - IAD

Nonstop8h 25mVirgin Atlantic

Thu 2/1017:50IAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 16/9£402

Thu 6/1112:10LHR - IAD

Nonstop8h 25mBritish Airways

Mon 10/1118:20IAD - LHR

Nonstop7h 10mBritish Airways

Deal found 17/9£402

Fri 14/1116:25LHR - IAD

Nonstop8h 30mBritish Airways

Mon 17/1118:20IAD - LHR

Nonstop7h 10mBritish Airways

Deal found 17/9£403

Wed 1/1012:35LHR - IAD

Nonstop8h 25mVirgin Atlantic

Tue 7/1017:50IAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 17/9£404

Thu 2/1012:35LHR - IAD

Nonstop8h 25mVirgin Atlantic

Sun 19/1018:45IAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 16/9£409

Tue 23/917:00LHR - IAD

Nonstop8h 10mBritish Airways

Tue 30/922:45IAD - LHR

Nonstop7h 20mBritish Airways

Deal found 16/9£410

Tue 25/1112:10LHR - IAD

Nonstop8h 25mBritish Airways

Sun 30/1118:20IAD - LHR

Nonstop7h 10mBritish Airways

Deal found 17/9£410

Thu 6/1116:20LHR - IAD

Nonstop8h 55mUnited Airlines

Wed 12/1122:15IAD - LHR

Nonstop7h 35mUnited Airlines

Deal found 17/9£412

Thu 2/1016:40LHR - IAD

Nonstop8h 15mUnited Airlines

Mon 6/1022:25IAD - LHR

Nonstop7h 15mUnited Airlines

Deal found 17/9£413

Last-minute flights from London to Dulles Intl
Discover last-minute flight deals from London to Dulles Intl. Data last updated 18 September 2025 and is based on user searches.

Tue 23/915:05LHR - IAD

1 stop28h 30mUnited Airlines

Tue 30/912:35IAD - LHR

1 stop12h 20mUnited Airlines

Deal found 16/9£393

Tue 23/907:30LHR - IAD

1 stop12h 45mUnited Airlines

Thu 2/1006:15IAD - LHR

1 stop9h 25mUnited Airlines

Deal found 16/9£396

Tue 23/919:30LHR - IAD

1 stop24h 05mAustrian Airlines

Wed 1/1017:15IAD - LHR

1 stop32h 05mAustrian Airlines

Deal found 16/9£398

Wed 24/907:45LHR - IAD

1 stop11h 40mBrussels Airlines

Thu 2/1017:36IAD - LHR

1 stop13h 44mBrussels Airlines

Deal found 15/9£397

Thu 25/908:40LHR - IAD

1 stop12h 35mUnited Airlines

Tue 30/918:40IAD - LHR

Nonstop7h 15mUnited Airlines

Deal found 16/9£391

Thu 25/908:40LHR - IAD

1 stop12h 35mUnited Airlines

Wed 1/1013:00IAD - LHR

1 stop12h 30mUnited Airlines

Deal found 17/9£393

Fri 26/907:45LHR - IAD

1 stop11h 40mUnited Airlines

Sun 28/909:35IAD - LHR

1 stop15h 55mUnited Airlines

Deal found 16/9£396

Thu 2/1006:00LHR - IAD

1 stop13h 35mAustrian Airlines

Mon 6/1018:40IAD - LHR

Nonstop7h 15mAustrian Airlines

Deal found 15/9£392

Thu 2/1009:30LHR - IAD

1 stop11h 20mUnited Airlines

Sun 7/1222:15IAD - LHR

Nonstop7h 35mUnited Airlines

Deal found 14/9£394

Thu 9/1006:30LHR - IAD

1 stop12h 00mUnited Airlines

Sun 12/1008:30IAD - LHR

2 stops17h 00mUnited Airlines

Deal found 15/9£395

Thu 23/1008:45LTN - IAD

1 stop15h 10mMultiple Airlines

Sun 26/1018:05IAD - LTN

1 stop10h 50mMultiple Airlines

Deal found 17/9£392

Sun 26/1011:10LGW - IAD

1 stop13h 20mMultiple Airlines

Sun 2/1117:05IAD - LGW

1 stop11h 10mMultiple Airlines

Deal found 16/9£396

One-way flights from London to Dulles Intl
Search for one-way flight options from London to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated 18 September 2025.

Fri 10/1020:20LGW - IAD

3 stops51h 45mMultiple Airlines

Deal found 15/9£370

Mon 12/114:25STN - IAD

1 stop31h 05mMultiple Airlines

Deal found 15/9£370

Mon 10/1110:15STN - IAD

1 stop34h 20mMultiple Airlines

Deal found 15/9£371

Tue 23/920:25SEN - IAD

3 stops47h 55mMultiple Airlines

Deal found 15/9£372

Wed 1/1017:30SEN - IAD

3 stops26h 50mMultiple Airlines

Deal found 15/9£373

Wed 11/206:50LTN - IAD

2 stops16h 40mMultiple Airlines

Deal found 15/9£374

Fri 24/1006:40STN - IAD

1 stop14h 10mMultiple Airlines

Deal found 15/9£374

Sat 25/1021:25LTN - IAD

2 stops47h 50mMultiple Airlines

Deal found 16/9£374

Sun 30/1115:15SEN - IAD

2 stops29h 00mMultiple Airlines

Deal found 15/9£374

Fri 26/906:45STN - IAD

2 stops20h 25mMultiple Airlines

Deal found 16/9£375

Sat 25/1017:30STN - IAD

1 stop28h 05mMultiple Airlines

Deal found 16/9£376

Mon 15/1217:50LHR - IAD

2 stops26h 45mMultiple Airlines

Deal found 16/9£377

Cheapflights Fare Finder

Use the filters below to find and compare flights from London to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 31/10

09:00-17:40

1 stop12h 40m

Washington, D.C. Dulles Intl

Fri 7/11

18:20-06:40

Nonstop7h 20m

£391

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sun 1/2

09:00-16:40

1 stop12h 40m

Washington, D.C. Dulles Intl

Mon 9/2

22:15-10:50

Nonstop7h 35m

£391

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 28/11

09:00-16:40

1 stop12h 40m

Washington, D.C. Dulles Intl

Fri 12/12

06:00-07:10

2 stops20h 10m

£391

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 13/11

21:20-18:30

2 stops26h 10m

Washington, D.C. Dulles Intl

Sun 30/11

19:40-20:55

2 stops20h 15m

£392

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 30/10

06:00-15:40

1 stop13h 40m

Washington, D.C. Dulles Intl

Wed 12/11

18:20-06:40

Nonstop7h 20m

£393

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 7/11

09:00-16:40

1 stop12h 40m

Washington, D.C. Dulles Intl

Mon 10/11

08:30-07:10

2 stops17h 40m

£393

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 10/11

13:45-16:40

1 stop31h 55m

Washington, D.C. Dulles Intl

Sun 23/11

17:33-09:10

1 stop10h 37m

£393

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 6/11

14:50-14:40

1 stop28h 50m

Washington, D.C. Dulles Intl

Wed 12/11

18:20-06:40

Nonstop7h 20m

£393

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 2/3

14:50-14:40

1 stop28h 50m

Washington, D.C. Dulles Intl

Tue 10/3

23:15-10:50

Nonstop7h 35m

£393

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 12/1

06:00-15:30

1 stop14h 30m

Washington, D.C. Dulles Intl

Thu 15/1

20:30-13:00

1 stop11h 30m

£394

Flights are sorted by cheapest return flights first.

Deals found on 15/9

Showing 1-10 of 60 results

...

Best time to book a flight from London to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from London with our price prediction graph.

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London to Washington, D.C. Dulles Intl Airport

How far ahead should I book a flight from London to Washington, D.C. Dulles Intl Airport?

The best time to book flights from London to Washington, D.C. Dulles Intl Airport is 64 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from London to Washington, D.C. Dulles Intl Airport?

Currently, January is the cheapest month in which you can book a flight from London to Washington, D.C. Dulles Intl Airport (average of £599). Flying from London to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £947). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LON to IAD?

Unlike in the afternoon, when flights are generally more expensive, you can save up to 17% on flights from London to Washington, D.C. Dulles Intl Airport by exploring options for tickets in the evening.

What is the cheapest day to fly from London to Washington, D.C. Dulles Intl Airport?

Travellers seeking maximum savings on their London to Washington, D.C. Dulles Intl Airport flight should consider departing on Sunday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from London to Washington, D.C. Dulles Intl Airport

The most flights from LON to IAD are scheduled on a Wednesday (32 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (17 on average).

How much does it cost for a return flight from London to Washington, D.C. Dulles Intl Airport?

What’s the top stopover airport for flights from London to Washington, D.C. Dulles Intl Airport?

Reykjavik (KEF) – chosen by Cheapflights users on 41% of one-stop itineraries from London to Washington, D.C. Dulles Intl Airport on Cheapflights.

What’s the cheapest stopover airport for flights from London to Washington, D.C. Dulles Intl Airport?

Lisbon (LIS) is the most affordable one-stop option, with an average return flight price of £434.

What’s the fastest stopover option from London to Washington, D.C. Dulles Intl Airport?

Flights via Reykjavik (KEF) have the shortest average one-way travel time for one-stop routes: 10h 59m.

Which airport typically offers the quickest stopover for flights from London to Washington, D.C. Dulles Intl Airport?

Flights via New York (JFK) offer the fastest connection on this route, with an average stopover time of 1h 11m.

Reviews of airlines servicing Dulles Intl

Read through reviews of airlines operating flights from London to Washington, D.C. Dulles Intl Airport, such as Virgin Atlantic, Aer Lingus, andIcelandair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Virgin Atlantic

7.4

Good

664 reviews

Check prices

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!

Virgin Atlantic

7.4

Good

664 reviews

Virgin Atlantic

7.4

Good

664 reviews

Check prices

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

Aer Lingus

7.2

Good

1,277 reviews

Virgin Atlantic

7.4

Good

664 reviews

Check prices

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

Icelandair

7.0

Good

545 reviews

Virgin Atlantic

7.4

Good

664 reviews

Check prices

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

Lufthansa

6.8

Okay

7,409 reviews

Virgin Atlantic

7.4

Good

664 reviews

Check prices

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

British Airways

6.7

Okay

7,367 reviews

Virgin Atlantic

7.4

Good

664 reviews

Check prices

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

Related info for your journey

How long is the flight from London to Washington, D.C. Dulles Intl Airport?
For as low as £391, United Airlines can have you in Washington, D.C. Dulles Intl Airport from London in 12h 40m. London and Washington, D.C. Dulles Intl Airport are separated by a distance of 3664 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the cheapest airlines flying from London to Washington, D.C. Dulles Intl Airport round-trip?
Our cheapest airline available from London to Washington, D.C. Dulles Intl Airport is Delta. Our recent data shows that you can find tickets from as low as £185 on this airline. Additional options worth looking into are PLAY and Icelandair, starting at £241 and £341 round-trip. Users have found that Delta is 67% cheaper than the other options available to this destination.
What are the cheapest airlines to fly from London to Washington, D.C. Dulles Intl Airport one-way?
The cheapest airline one-way is TAP AIR PORTUGAL, with whom users have recently found tickets for as low as £379. However, be on the lookout for offers from Aer Lingus and British Airways, as they are both options that can get you from London to Washington, D.C. Dulles Intl Airport for a low price.
What are the most popular routes from London to Washington, D.C. Dulles Intl Airport?
The most popular flight routes from London to Washington, D.C. Dulles Intl Airport are London Heathrow - Washington, D.C. Dulles Intl, London Gatwick - Washington, D.C. Dulles Intl and London City - Washington, D.C. Dulles Intl.
What are the most reliable airlines from London to Washington, D.C. Dulles Intl Airport?
Before booking your flight to Washington, D.C. Dulles Intl Airport from London, check out the most reliable airlines to get you to your destination on time: KLM (90%), Air France (90%), Delta( 90%).
What are the cheapest flights from London to Washington, D.C. Dulles Intl Airport?
On average you can expect to pay £1,276 for a flight from London to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is £382 while the most popular route, (London Heathrow - Washington, D.C. Dulles Intl) is currently priced at £332.
Where are the most common stopover locations when flying from London to Washington, D.C. Dulles Intl Airport?
London to Washington, D.C. Dulles Intl Airport flights have a stopover in Dublin most often.
What are some popular things to do or see while on a stopover in Dublin?
Bord Gáis Energy Theatre, 3Olympia Theatre, and Royal Dublin Society are currently the most popular points of interest in Dublin at the moment. Those on a stopover in Dublin interested in visiting Bord Gáis Energy Theatre, 3Olympia Theatre, or Royal Dublin Society can do so by traveling 5.7 mi, 5.7 mi, and 6.9 mi, respectively from Dublin. Those looking to explore during their stopover in Dublin can hire a car from Dublin for about £31 per day.
Where are the least popular stopover locations for London to Washington, D.C. Dulles Intl Airport flights?
London to Washington, D.C. Dulles Intl Airport flights have a stopover in Reykjavik least often.
Can I find deals for flights from London to Dulles Intl that include hotel bookings?
Yes. In addition to deals on London to Dulles Intl flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from London to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Dulles Intl.
Can I find deals for business class flights from London to Dulles Intl?
Yes. Cheapflights offers flight deals from London to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from London to Washington, D.C. Dulles Intl Airport?
Currently, January is the cheapest month in which you can book a flight from London to Washington, D.C. Dulles Intl Airport (average of £599). Flying from London to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £947). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Top 10 airlines flying from London to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest£185	Average£525	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
PLAY	Cheapest£241	Average£388	FlexibilityNo cancel fee	On-timeN/A	Search PLAY flights
Icelandair	Cheapest£341	Average£504	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
TAP AIR PORTUGAL	Cheapest£347	Average£502	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Aer Lingus	Cheapest£392	Average£567	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
United Airlines	Cheapest£413	Average£612	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Finnair	Cheapest£427	Average£603	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Lufthansa	Cheapest£430	Average£594	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Scandinavian Airlines	Cheapest£430	Average£570	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
Air France	Cheapest£431	Average£580	FlexibilityNo cancel fee	On-time77%	Search Air France flights

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How does Cheapflights help users find flights from London to Dulles Intl?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Dulles Intl from London today with Cheapflights!

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It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from London to Dulles Intl.

Can Cheapflights find flights from London to Dulles Intl with no change fees?

Certainly. Search results for flights to Dulles Intl from London shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from London to Dulles Intl become cheaper?

Of course! You can now track prices for flights from London to Dulles Intl and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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Cheap flights from London to Washington, D.C. Dulles Intl Airport from £370

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from London to Washington, D.C. Dulles Intl are usually found in September or March, booked 64 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

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Cheapest flights from London to Dulles IntlExplore the most affordable flight options available from London to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2025.

Explore the most affordable flight options available from London to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2025.

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Use the filters below to find and compare flights from London to Washington, D.C. Dulles Intl Airport that are best for you.

Best time to book a flight from London to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from London with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from London to Washington, D.C. Dulles Intl Airport

How far ahead should I book a flight from London to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the optimal time to book a return flight from London to Dulles Intl. Price data was last updated on 12 September 2025.

What is the cheapest month to book a flight from London to Washington, D.C. Dulles Intl Airport?

What is the cheapest time of day to fly from LON to IAD?

Find hourly flight availability from London to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 18 September 2025.

What is the cheapest day to fly from London to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the cheapest time to fly return from London to Dulles Intl. Price data was last updated on 16 December 2024.

Weekly flight availability from London to Washington, D.C. Dulles Intl Airport

How much does it cost for a return flight from London to Washington, D.C. Dulles Intl Airport?

What’s the top stopover airport for flights from London to Washington, D.C. Dulles Intl Airport?

Share of one-stop return flights from London to Washington, D.C. Dulles Intl Airport chosen by Cheapflights users in the past 12 months, using the same stopover each way.

What’s the cheapest stopover airport for flights from London to Washington, D.C. Dulles Intl Airport?

Average return fare for one-stop flights from London to Washington, D.C. Dulles Intl Airport, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

What’s the fastest stopover option from London to Washington, D.C. Dulles Intl Airport?

Shortest average travel time for one-stop one-way flights from London to Washington, D.C. Dulles Intl Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Which airport typically offers the quickest stopover for flights from London to Washington, D.C. Dulles Intl Airport?

Average stopover duration for one-stop one-way flights from London to Washington, D.C. Dulles Intl Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Reviews of airlines servicing Dulles Intl

Read through reviews of airlines operating flights from London to Washington, D.C. Dulles Intl Airport, such as Virgin Atlantic, Aer Lingus, andIcelandair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from London to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

How long is the flight from London to Washington, D.C. Dulles Intl Airport?

What are the cheapest airlines flying from London to Washington, D.C. Dulles Intl Airport round-trip?

What are the cheapest airlines to fly from London to Washington, D.C. Dulles Intl Airport one-way?

What are the most popular routes from London to Washington, D.C. Dulles Intl Airport?

What are the most reliable airlines from London to Washington, D.C. Dulles Intl Airport?

What are the cheapest flights from London to Washington, D.C. Dulles Intl Airport?

Where are the most common stopover locations when flying from London to Washington, D.C. Dulles Intl Airport?

What are some popular things to do or see while on a stopover in Dublin?

Where are the least popular stopover locations for London to Washington, D.C. Dulles Intl Airport flights?

Can I find deals for flights from London to Dulles Intl that include hotel bookings?

How can I find direct flights from London to Dulles Intl?

Can I find deals for business class flights from London to Dulles Intl?

What is the cheapest month to book a flight from London to Washington, D.C. Dulles Intl Airport?

Travelling to a place near Washington, D.C. Dulles Intl Airport?

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Fly from London to Dulles Intl on these airlines

Choose from the following airlines for your flight from London to Dulles Intl. Flights are based on user searches made on Cheapflights and were last updated on 18 September 2025.

Top 10 airlines flying from London to Dulles Intl

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Why should you use Cheapflights to find cheap flight tickets from London to Dulles Intl?

Can Cheapflights find flights from London to Dulles Intl with no change fees?

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Cheapest flights from London to Dulles Intl
Explore the most affordable flight options available from London to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2025.