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

There are many flights that can get you from Washington, D.C. Dulles Intl Airport to London in 7h 35m. Fly via Icelandair, Scandinavian Airlines, or United Airlines to get the fastest option. Airlines will cover 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 Washington, D.C. Dulles Intl Airport to London round-trip?

Flying on Lufthansa is currently your cheapest option to London, with prices starting at £306. Additional return tickets that might be worth considering are offered by Icelandair and Virgin Atlantic, with the lowest prices starting at £365 and £374, respectively. Lufthansa is 43% cheaper than the average price of flights available within the next 90 days to this destination.

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

The cheapest airline one-way is TAP AIR PORTUGAL, with whom users have recently found tickets for as low as £203. However, be on the lookout for offers from British Airways and ITA Airways, as they are both options that can get you from Washington, D.C. Dulles Intl Airport to London for a low price.

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

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

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London, 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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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

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

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

Looking at all options, your cheapest flight can be booked for £284. While the most popular route (Washington, D.C. Dulles Intl - London Heathrow) can be booked for £312 on average, our data indicates £647 when flying from Washington, D.C. Dulles Intl Airport to London.

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

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Washington, D.C. Dulles Intl Airport to London on time: Aeromexico (100%), KLM (70%), Air France (70%).

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

Air France, British Airways and Icelandair are the most popular airlines when flying from Washington, D.C. Dulles Intl Airport to London.

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

Departing on a Tuesday is a good option for securing a great price. You can expect to save up to 18% when planning your travel around this day of the week.

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

January is one of the best times of the year to fly to London from Washington, D.C. Dulles Intl Airport. Prices for January average £540 per person but you can even find prices for as low as £287. The most expensive prices can be found in the month of June. Opting for a January flight can save you 29% on your journey compared to booking in June

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

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

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

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

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

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

£193+ Flights from Washington, D.C. Dulles Intl Airport to London

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

Airfare is below average for this route at the moment. Washington, D.C. Dulles Intl Airport to London flights typically cost between £422 and £529 in October. The cheapest return flight price found within the last 3 days was £362 on Icelandair (15 Oct-20 Oct).

Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to London are usually found in January or October, booked 81 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from Dulles Intl to London

Round-trip from	£362
One-way from	£193
Popular in	June
Cheapest in	January
Average price	£479
Good round-trip deal	£478 or less
Good one-way deal	£313 or less

Icelandair
15/10-20/10
2 total stops
45h 50m total
Washington, D.C. to London

Search Deals

15/10
2 total stops
16h 55m total
Washington, D.C. to London

Search Deals

Highest demand for flights based on searches. 13% potential increase in price (£63 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£13 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 Washington, D.C. Dulles Intl to London (LON).

Search Deals

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

Search Deals

Find flight deals from Dulles Intl to London

Cheapest flights from Dulles Intl to London
Explore the most affordable flight options available from Dulles Intl to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 September 2025.

Wed 15/1020:30IAD - LGW

1 stop13h 10mIcelandair

Mon 20/1015:40LGW - IAD

1 stop32h 40mIcelandair

Deal found 11/9£362

Wed 8/1020:30IAD - LHR

1 stop18h 50mIcelandair

Wed 15/1013:05LHR - IAD

1 stop14h 05mIcelandair

Deal found 10/9£362

Tue 28/1020:40IAD - STN

2 stops20h 40mMultiple Airlines

Tue 11/1106:30STN - IAD

2 stops17h 00mMultiple Airlines

Deal found 11/9£363

Tue 30/920:30IAD - LGW

1 stop13h 10mIcelandair

Wed 8/1015:40LGW - IAD

1 stop11h 30mIcelandair

Deal found 11/9£363

Wed 1/1020:30IAD - LHR

1 stop10h 25mIcelandair

Thu 9/1021:25LHR - IAD

1 stop26h 55mIcelandair

Deal found 11/9£363

Thu 23/1020:30IAD - STN

2 stops14h 15mMultiple Airlines

Sun 2/1108:30STN - IAD

2 stops15h 00mMultiple Airlines

Deal found 11/9£364

Wed 8/1020:30IAD - LGW

1 stop13h 10mIcelandair

Wed 29/1011:55LGW - IAD

1 stop11h 35mIcelandair

Deal found 10/9£364

Mon 13/1020:30IAD - LHR

1 stop10h 25mIcelandair

Thu 23/1021:25LHR - IAD

1 stop26h 55mIcelandair

Deal found 11/9£364

Tue 30/920:30IAD - LGW

1 stop13h 10mIcelandair

Fri 10/1015:40LGW - IAD

1 stop11h 30mIcelandair

Deal found 11/9£365

Sat 4/1020:30IAD - LHR

1 stop10h 25mIcelandair

Wed 15/1021:25LHR - IAD

1 stop26h 55mIcelandair

Deal found 10/9£365

Wed 15/1023:15IAD - LGW

1 stop10h 25mIcelandair

Thu 23/1015:40LGW - IAD

1 stop32h 40mIcelandair

Deal found 11/9£365

Wed 10/1219:40IAD - LTN

1 stop12h 15mMultiple Airlines

Wed 17/1208:00LTN - IAD

1 stop15h 30mMultiple Airlines

Deal found 9/9£365

Best flights from Dulles Intl to London
Discover carefully curated flight deals from Dulles Intl to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 12 September 2025.

Wed 10/1219:40IAD - LTN

1 stop12h 15mMultiple Airlines

Wed 17/1208:00LTN - IAD

1 stop15h 30mMultiple Airlines

Deal found 9/9£365

Mon 1/1219:40IAD - LGW

1 stop10h 15mIcelandair

Sat 13/1211:55LGW - IAD

1 stop11h 35mIcelandair

Deal found 11/9£382

Tue 14/1012:09IAD - LHR

2 stops16h 26mScandinavian Airlines

Tue 21/1010:20LHR - IAD

1 stop14h 39mScandinavian Airlines

Deal found 11/9£412

Mon 27/1023:15IAD - LHR

Nonstop7h 35mUnited Airlines

Thu 6/1113:45LHR - IAD

1 stop31h 55mUnited Airlines

Deal found 11/9£420

Wed 3/1222:20IAD - LHR

Nonstop7h 30mDelta

Fri 12/1210:00LHR - IAD

1 stop11h 05mDelta

Deal found 11/9£427

Wed 22/1017:25IAD - LCY

1 stop9h 45mKLM

Wed 29/1010:00LCY - IAD

1 stop11h 05mKLM

Deal found 11/9£471

Wed 3/1212:19IAD - LCY

2 stops15h 31mVirgin Atlantic

Tue 9/1207:45LCY - IAD

1 stop13h 20mVirgin Atlantic

Deal found 11/9£474

Tue 14/1016:30IAD - LCY

1 stop12h 35mITA Airways

Thu 2/416:50LCY - IAD

1 stop26h 50mITA Airways

Deal found 12/9£508

Tue 13/119:40IAD - LTN

1 stop14h 10mMultiple Airlines

Tue 20/107:00LTN - IAD

1 stop16h 30mMultiple Airlines

Deal found 10/9£368

Sun 30/1119:40IAD - LGW

1 stop10h 15mIcelandair

Sat 13/1211:55LGW - IAD

1 stop11h 35mIcelandair

Deal found 11/9£382

Wed 3/1219:40IAD - LTN

1 stop12h 15mMultiple Airlines

Mon 15/1208:00LTN - IAD

1 stop15h 30mMultiple Airlines

Deal found 11/9£381

Tue 2/1222:15IAD - LHR

Nonstop7h 35mUnited Airlines

Thu 11/1213:45LHR - IAD

1 stop31h 55mUnited Airlines

Deal found 11/9£420

Direct flights from Dulles Intl to London
Explore direct flight options from Dulles Intl to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 12 September 2025.

Mon 13/1022:25IAD - LHR

Nonstop7h 15mLufthansa

Wed 22/1016:40LHR - IAD

Nonstop8h 15mLufthansa

Deal found 11/9£403

Sun 12/1022:25IAD - LHR

Nonstop7h 15mLufthansa

Tue 21/1012:15LHR - IAD

Nonstop8h 15mLufthansa

Deal found 10/9£406

Sun 28/917:50IAD - LHR

Nonstop7h 30mVirgin Atlantic

Tue 7/1012:35LHR - IAD

Nonstop8h 25mVirgin Atlantic

Deal found 12/9£413

Mon 22/917:50IAD - LHR

Nonstop7h 30mVirgin Atlantic

Wed 8/1012:35LHR - IAD

Nonstop8h 25mVirgin Atlantic

Deal found 11/9£414

Mon 13/1018:45IAD - LHR

Nonstop7h 30mVirgin Atlantic

Wed 22/1012:35LHR - IAD

Nonstop8h 25mVirgin Atlantic

Deal found 12/9£415

Wed 8/1017:50IAD - LHR

Nonstop7h 30mVirgin Atlantic

Wed 15/1012:35LHR - IAD

Nonstop8h 25mVirgin Atlantic

Deal found 10/9£416

Wed 15/1018:45IAD - LHR

Nonstop7h 30mVirgin Atlantic

Tue 21/1012:35LHR - IAD

Nonstop8h 25mVirgin Atlantic

Deal found 11/9£422

Mon 29/917:50IAD - LHR

Nonstop7h 30mVirgin Atlantic

Tue 21/1012:35LHR - IAD

Nonstop8h 25mVirgin Atlantic

Deal found 10/9£424

Wed 24/922:40IAD - LHR

Nonstop7h 25mBritish Airways

Thu 9/1012:45LHR - IAD

Nonstop8h 10mBritish Airways

Deal found 11/9£427

Sun 28/917:50IAD - LHR

Nonstop7h 25mBritish Airways

Tue 7/1017:00LHR - IAD

Nonstop8h 15mBritish Airways

Deal found 12/9£429

Wed 1/1017:50IAD - LHR

Nonstop7h 25mBritish Airways

Wed 29/1016:25LHR - IAD

Nonstop8h 30mBritish Airways

Deal found 11/9£430

Last-minute flights from Dulles Intl to London
Discover last-minute flight deals from Dulles Intl to London. Data last updated 12 September 2025 and is based on user searches.

Sun 21/920:30IAD - LHR

1 stop10h 25mIcelandair

Tue 30/921:25LHR - IAD

1 stop26h 55mIcelandair

Deal found 11/9£367

Sun 21/920:30IAD - LHR

1 stop10h 25mIcelandair

Tue 7/1013:05LHR - IAD

1 stop11h 15mIcelandair

Deal found 11/9£372

Mon 29/920:30IAD - LGW

1 stop13h 05mIcelandair

Fri 10/1015:40LGW - IAD

1 stop11h 30mIcelandair

Deal found 12/9£369

Tue 30/920:30IAD - LGW

1 stop13h 10mIcelandair

Wed 8/1015:40LGW - IAD

1 stop11h 30mIcelandair

Deal found 11/9£363

Wed 8/1020:30IAD - LGW

1 stop13h 10mIcelandair

Wed 29/1011:55LGW - IAD

1 stop11h 35mIcelandair

Deal found 10/9£364

Mon 13/1017:45IAD - LTN

2 stops24h 35mMultiple Airlines

Tue 21/1018:10LTN - IAD

2 stops26h 10mMultiple Airlines

Deal found 10/9£369

Wed 15/1020:30IAD - LGW

1 stop13h 10mIcelandair

Mon 20/1015:40LGW - IAD

1 stop32h 40mIcelandair

Deal found 11/9£362

Wed 15/1020:30IAD - LGW

1 stop13h 10mIcelandair

Wed 22/1015:40LGW - IAD

1 stop32h 40mIcelandair

Deal found 11/9£365

Sat 18/1023:15IAD - LGW

1 stop10h 20mIcelandair

Thu 30/1011:55LGW - IAD

1 stop11h 35mIcelandair

Deal found 10/9£366

Tue 28/1020:40IAD - LGW

2 stops18h 50mMultiple Airlines

Tue 11/1108:50LGW - IAD

2 stops14h 40mMultiple Airlines

Deal found 11/9£368

Tue 28/1018:30IAD - LGW

1 stop17h 15mTAP AIR PORTUGAL

Fri 7/1110:40LGW - IAD

1 stop15h 20mTAP AIR PORTUGAL

Deal found 10/9£371

Tue 28/1020:40IAD - LTN

2 stops19h 25mMultiple Airlines

Tue 11/1109:00LTN - IAD

2 stops14h 30mMultiple Airlines

Deal found 11/9£372

One-way flights from Dulles Intl to London
Search for one-way flight options from Dulles Intl to London. Find affordable one-way fares based on user searches. Data last updated 12 September 2025.

Wed 15/1017:50IAD - LTN

2 stops16h 55mMultiple Airlines

Deal found 10/9£193

Thu 16/1017:50IAD - LGW

2 stops24h 15mMultiple Airlines

Deal found 10/9£195

Sat 18/1022:35IAD - LGW

3 stops43h 10mMultiple Airlines

Deal found 10/9£196

Fri 7/1122:30IAD - LHR

1 stop15h 25mTAP AIR PORTUGAL

Deal found 10/9£196

Thu 16/1022:20IAD - LGW

1 stop30h 25mTAP AIR PORTUGAL

Deal found 10/9£196

Fri 28/1122:30IAD - LTN

2 stops34h 30mMultiple Airlines

Deal found 11/9£196

Mon 3/1118:18IAD - LGW

2 stops30h 42mMultiple Airlines

Deal found 10/9£197

Sun 9/1122:30IAD - LHR

1 stop14h 00mTAP AIR PORTUGAL

Deal found 11/9£197

Mon 3/1117:30IAD - LTN

2 stops20h 55mMultiple Airlines

Deal found 10/9£197

Fri 17/1017:00IAD - LGW

2 stops24h 55mMultiple Airlines

Deal found 10/9£198

Sun 12/1022:20IAD - STN

2 stops20h 39mMultiple Airlines

Deal found 11/9£199

Mon 8/1215:36IAD - LGW

2 stops57h 24mMultiple Airlines

Deal found 11/9£199

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.London

IAD - LTN

IADLTN

Washington, D.C. Dulles Intl

Wed 10/12

19:40-12:55

1 stop12h 15m

London Luton

Wed 17/12

08:00-18:30

1 stop15h 30m

£365

Washington, D.C.London

IAD - LTN

IADLTN

Washington, D.C. Dulles Intl

Tue 13/1

19:40-14:50

1 stop14h 10m

London Luton

Tue 20/1

07:00-18:30

1 stop16h 30m

£368

Washington, D.C.London

IAD - LTN

IADLTN

Washington, D.C. Dulles Intl

Wed 3/12

19:40-12:55

1 stop12h 15m

London Luton

Mon 15/12

08:00-18:30

1 stop15h 30m

£381

Washington, D.C.London

IAD - LTN

IADLTN

Washington, D.C. Dulles Intl

Mon 1/12

19:40-14:00

1 stop13h 20m

London Luton

Mon 15/12

08:00-18:30

1 stop15h 30m

£381

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 1/12

19:40-10:55

1 stop10h 15m

London Gatwick

Sat 13/12

11:55-18:30

1 stop11h 35m

£382

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 30/11

19:40-10:55

1 stop10h 15m

London Gatwick

Sat 13/12

11:55-18:30

1 stop11h 35m

£382

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 17/11

19:40-10:55

1 stop10h 15m

London Gatwick

Fri 21/11

11:55-18:30

1 stop11h 35m

£382

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 18/11

19:40-10:55

1 stop10h 15m

London Gatwick

Tue 25/11

11:55-18:30

1 stop11h 35m

£382

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 8/12

19:40-10:55

1 stop10h 15m

London Gatwick

Fri 23/1

11:55-18:30

1 stop11h 35m

£382

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 7/12

19:40-10:55

1 stop10h 15m

London Gatwick

Fri 23/1

11:55-18:30

1 stop11h 35m

£382

Flights are sorted by cheapest return flights first.

Deals found on 10/9

Showing 1-10 of 60 results

...

Best time to book a flight from Dulles Intl to London

Have a flexible travel schedule? Discover the best time to fly to London from Dulles Intl 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 Washington, D.C. Dulles Intl Airport to London

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

To ensure you get the cheapest price possible for a flight from Washington, D.C. Dulles Intl Airport to London, you should look to book at least 81 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London (average of £112). Flying from Washington, D.C. Dulles Intl Airport to London in August is currently the most expensive (average of £164). 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 IAD to LON?

It’s optimal to fly from Washington, D.C. Dulles Intl Airport to London at midday. By choosing this option you can save up to 3% on the cost of your flight, compared to a flight in the morning.

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

The most flights from IAD to LON are scheduled on a Monday (28 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (22 on average).

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

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

Reykjavik (KEF) – chosen by Cheapflights users on 63% of one-stop itineraries from Washington, D.C. Dulles Intl Airport to London on Cheapflights.

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

Reykjavik (KEF) is the most affordable one-stop option, with an average return flight price of £324.

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

Flights via Dublin (DUB) have the shortest average one-way travel time for one-stop routes: 10h 12m.

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

Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average stopover time of 1h 26m.

Reviews of airlines servicing London

See what other customers who have flown with Virgin Atlantic, Icelandair, andIberia from Washington, D.C. Dulles Intl Airport to London have to say. You can also see how each airline compares in terms of 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

Icelandair

7.0

Good

546 reviews

Virgin Atlantic

7.4

Good

664 reviews

Check prices

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

Iberia

7.0

Good

2,929 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

7,361 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 Washington, D.C. Dulles Intl Airport to London?
There are many flights that can get you from Washington, D.C. Dulles Intl Airport to London in 7h 35m. Fly via Icelandair, Scandinavian Airlines, or United Airlines to get the fastest option. Airlines will cover 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 Washington, D.C. Dulles Intl Airport to London round-trip?
Flying on Lufthansa is currently your cheapest option to London, with prices starting at £306. Additional return tickets that might be worth considering are offered by Icelandair and Virgin Atlantic, with the lowest prices starting at £365 and £374, respectively. Lufthansa is 43% cheaper than the average price of flights available within the next 90 days to this destination.
What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to London one-way?
The cheapest airline one-way is TAP AIR PORTUGAL, with whom users have recently found tickets for as low as £203. However, be on the lookout for offers from British Airways and ITA Airways, as they are both options that can get you from Washington, D.C. Dulles Intl Airport to London for a low price.
What are the most popular routes from Washington, D.C. Dulles Intl Airport to London?
The most popular flight routes from Washington, D.C. Dulles Intl Airport to London are Washington, D.C. Dulles Intl - London Heathrow, Washington, D.C. Dulles Intl - London Gatwick and Washington, D.C. Dulles Intl - London City.
What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to London?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Washington, D.C. Dulles Intl Airport to London on time: Aeromexico (100%), KLM (70%), Air France (70%).
What are the cheapest flights from Washington, D.C. Dulles Intl Airport to London?
Looking at all options, your cheapest flight can be booked for £284. While the most popular route (Washington, D.C. Dulles Intl - London Heathrow) can be booked for £312 on average, our data indicates £647 when flying from Washington, D.C. Dulles Intl Airport to London.
Can I find deals for flights from Dulles Intl to London that include hotel bookings?
Yes. In addition to deals on Dulles Intl to London flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Dulles Intl to London?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to London.
Can I find deals for business class flights from Dulles Intl to London?
Yes. Cheapflights offers flight deals from Dulles Intl to London 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 Washington, D.C. Dulles Intl Airport to London?
Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London (average of £112). Flying from Washington, D.C. Dulles Intl Airport to London in August is currently the most expensive (average of £164). 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 8 airlines flying from Dulles Intl to London

Airline	Cheapest	Average	Flexibility	On-time
Lufthansa	Cheapest£306	Average£519	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Icelandair	Cheapest£365	Average£542	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Virgin Atlantic	Cheapest£374	Average£606	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
British Airways	Cheapest£382	Average£521	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Air France	Cheapest£393	Average£521	FlexibilityNo cancel fee	On-time77%	Search Air France flights
Iberia	Cheapest£452	Average£492	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
KLM	Cheapest£455	Average£587	FlexibilityNo cancel fee	On-time75%	Search KLM flights
United Airlines	Cheapest£518	Average£620	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

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

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

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Cheap flights from Washington, D.C. Dulles Intl Airport to London from £193

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 15/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to London are usually found in January or October, booked 81 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from Dulles Intl to London

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Find flight deals from Dulles Intl to London

Cheapest flights from Dulles Intl to LondonExplore the most affordable flight options available from Dulles Intl to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 September 2025.

Explore the most affordable flight options available from Dulles Intl to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 September 2025.

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

Best time to book a flight from Dulles Intl to London

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

Cheapflights Insights

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

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

Use this chart to determine the optimal time to book a return flight from Dulles Intl to London. Price data was last updated on 29 August 2025.

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

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

Find hourly flight availability from Dulles Intl to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 12 September 2025.

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

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

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

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

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

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

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

Shortest average travel time for one-stop one-way flights from Washington, D.C. Dulles Intl Airport to London, 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 Washington, D.C. Dulles Intl Airport to London?

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

Reviews of airlines servicing London

See what other customers who have flown with Virgin Atlantic, Icelandair, andIberia from Washington, D.C. Dulles Intl Airport to London have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to London. 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 Washington, D.C. Dulles Intl Airport to London?

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

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

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

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

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

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

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

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

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

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Alternative routes for Dulles Intl to London

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Top 8 airlines flying from Dulles Intl to London

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

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

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

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

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Cheapest flights from Dulles Intl to London
Explore the most affordable flight options available from Dulles Intl to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 September 2025.