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

For as low as £392, United Airlines can have you in Washington, D.C. from London Heathrow Airport in 12h 40m. There are 3664 mi between London Heathrow Airport and Washington, D.C.. This flight may include one or multiple stops.

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

According to our current data, Delta (£185), PLAY (£241), and TAP AIR PORTUGAL (£348) offers the cheapest pricing from London Heathrow Airport to Washington, D.C.. Delta is currently priced 67% below the average price you’ll pay for this route.

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

The cheapest airline one-way is Aer Lingus, with whom users have recently found tickets for as low as £382. However, be on the lookout for offers from JetBlue and United Airlines, as they are both options that can get you from London Heathrow Airport to Washington, D.C. for a low price.

In terms of precipitation, rainfall in Washington, D.C. 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. when rainfall is around 66.0 mm.

If weather is an important factor for your trip to Washington, D.C., 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 Heathrow Airport to Washington, D.C.?

When deciding which route to take from London Heathrow Airport to Washington, D.C. consider London Heathrow - Washington, D.C. Dulles Intl, London Heathrow - Baltimore/Washington or London Heathrow - Washington, D.C. Reagan-National as they are the most popular.

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

Looking for the cheapest flight from London Heathrow Airport to Washington, D.C.? While on average our users pay £1,277, our data indicates the cheapest price to be £382. The most popular route (London Heathrow - Washington, D.C. Dulles Intl), is priced around £323.

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

Consider KLM (90%), Air France (90%) or Delta (90%) when booking your flight. These represent the most reliable airlines when flying from London Heathrow Airport to Washington, D.C..

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

When booking a flight from London Heathrow Airport to Washington, D.C., you may want to consider flying on American Airlines, Air Canada or Air France as they are the most popular for this route.

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

The most popular stopover on flights from London Heathrow Airport to Washington, D.C. is Dublin.

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

London Heathrow Airport to Washington, D.C. flights have a stopover in Reykjavik the least frequently.

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 Heathrow to Washington, D.C. that include hotel bookings?

Yes. In addition to deals on Heathrow to Washington, D.C. flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Heathrow to Washington, D.C.?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Washington, D.C..

Can I find deals for business class flights from Heathrow to Washington, D.C.?

Yes. Cheapflights offers flight deals from Heathrow to Washington, D.C. by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£350+ Flights from London Heathrow Airport to Washington, D.C.

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

Airfare is below average for this route at the moment. London Heathrow Airport to Washington, D.C. flights typically cost between £446 and £562 in September. The cheapest return flight price found within the last 3 days was £392 on United Airlines (26 Sept-3 Oct).

Cheapflights Tip: The best prices from London Heathrow to Washington, D.C. are usually found in September or February, booked 44 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

Cheap flight deals from Heathrow to Washington, D.C.

Round-trip from	£392
One-way from	£350
Popular in	July
Cheapest in	September
Average price	£485
Good round-trip deal	£467 or less
Good one-way deal	£468 or less

United Airlines
26/9-3/10
1 total stop
19h 50m total
London to Washington, D.C.

Search Deals

8/12
3 total stops
36h 35m total
London to Washington, D.C.

Search Deals

Highest demand for flights based on searches. 10% potential increase in price (£46 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£9 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 Heathrow to Washington, D.C. (WAS).

Search Deals

Price to beat on a one-way flight from London Heathrow to Washington, D.C. (WAS).

Search Deals

Find flight deals from Heathrow to Washington, D.C.

Cheapest flights from Heathrow to Washington, D.C.
Explore the most affordable flight options available from Heathrow to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2025.

Thu 25/908:40LHR - IAD

1 stop12h 35mUnited Airlines

Thu 2/1006:15IAD - LHR

1 stop9h 25mUnited Airlines

Deal found 16/9£392

Mon 3/1108:40LHR - BWI

2 stops21h 01mVirgin Atlantic

Thu 19/217:30BWI - LHR

1 stop10h 15mVirgin Atlantic

Deal found 14/9£392

Mon 22/906:50LHR - IAD

1 stop11h 40mUnited Airlines

Sun 28/918:40IAD - LHR

Nonstop7h 15mUnited Airlines

Deal found 15/9£392

Mon 27/1020:25LHR - DCA

2 stops30h 34mVirgin Atlantic

Fri 7/1119:35DCA - LHR

2 stops31h 15mVirgin Atlantic

Deal found 15/9£392

Mon 22/906:00LHR - IAD

1 stop13h 35mAustrian Airlines

Sun 28/922:25IAD - LHR

Nonstop7h 15mAustrian Airlines

Deal found 15/9£393

Thu 2/1009:55LHR - DCA

2 stops17h 16mVirgin Atlantic

Sun 19/1020:40DCA - LHR

1 stop29h 05mVirgin Atlantic

Deal found 16/9£393

Thu 6/1106:00LHR - IAD

1 stop13h 40mAustrian Airlines

Wed 12/1122:15IAD - LHR

Nonstop7h 35mAustrian Airlines

Deal found 16/9£394

Thu 2/1009:30LHR - IAD

1 stop11h 20mUnited Airlines

Sun 7/1222:15IAD - LHR

Nonstop7h 35mUnited Airlines

Deal found 14/9£394

Tue 18/1106:00LHR - BWI

2 stops16h 14mMultiple Airlines

Thu 27/1110:56BWI - LHR

1 stop13h 59mMultiple Airlines

Deal found 15/9£394

Thu 9/1006:30LHR - IAD

1 stop12h 00mUnited Airlines

Sun 12/1008:30IAD - LHR

2 stops17h 00mUnited Airlines

Deal found 15/9£395

Fri 7/1109:00LHR - DCA

2 stops15h 45mAir Canada

Mon 10/1112:55DCA - LHR

2 stops13h 15mAir Canada

Deal found 15/9£395

Wed 29/1012:05LHR - BWI

2 stops57h 09mUnited Airlines

Wed 5/1106:15BWI - LHR

1 stop20h 40mUnited Airlines

Deal found 14/9£395

Best flights from Heathrow to Washington, D.C.
Discover carefully curated flight deals from Heathrow to Washington, D.C. that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 September 2025.

Tue 3/309:00LHR - IAD

1 stop12h 40mUnited Airlines

Wed 11/319:20IAD - LHR

Nonstop7h 20mUnited Airlines

Deal found 15/9£392

Thu 6/1114:50LHR - IAD

1 stop28h 50mAustrian Airlines

Wed 12/1118:20IAD - LHR

Nonstop7h 20mAustrian Airlines

Deal found 16/9£394

Wed 1/1006:50LHR - DCA

2 stops14h 01mAir Canada

Sun 12/1016:35DCA - LHR

1 stop12h 00mAir Canada

Deal found 16/9£397

Wed 7/112:15LHR - BWI

1 stop11h 25mIcelandair

Sat 10/119:40BWI - LHR

1 stop10h 10mIcelandair

Deal found 15/9£400

Mon 8/1206:50LHR - BWI

2 stops15h 35mMultiple Airlines

Mon 15/1213:10BWI - LHR

2 stops15h 00mMultiple Airlines

Deal found 15/9£410

Tue 2/1215:25LHR - BWI

Nonstop8h 20mBritish Airways

Thu 11/1220:35BWI - LHR

Nonstop7h 05mBritish Airways

Deal found 16/9£415

Sat 13/1209:40LHR - DCA

1 stop11h 36mVirgin Atlantic

Thu 18/1214:55DCA - LHR

1 stop10h 55mVirgin Atlantic

Deal found 16/9£469

Mon 8/1207:40LHR - IAD

1 stop12h 55mUnited Airlines

Tue 13/118:20IAD - LHR

Nonstop7h 20mUnited Airlines

Deal found 14/9£393

Fri 9/120:35LHR - BWI

1 stop27h 05mIcelandair

Wed 14/119:40BWI - LHR

1 stop18h 50mIcelandair

Deal found 15/9£401

Thu 13/1109:00LHR - DCA

2 stops15h 45mAir Canada

Fri 21/1111:05DCA - LHR

1 stop15h 05mAir Canada

Deal found 16/9£411

Thu 9/1009:30LHR - IAD

1 stop11h 20mUnited Airlines

Mon 13/1022:25IAD - LHR

Nonstop7h 15mUnited Airlines

Deal found 14/9£394

Thu 6/1115:35LHR - DCA

1 stop12h 23mMultiple Airlines

Wed 12/1106:24DCA - LHR

1 stop10h 46mMultiple Airlines

Deal found 16/9£438

Fri 14/1106:50LHR - DCA

2 stops13h 41mAir Canada

Thu 4/1209:40DCA - LHR

1 stop15h 50mAir Canada

Deal found 16/9£417

Thu 11/1212:05LHR - IAD

2 stops16h 16mUnited Airlines

Tue 13/117:38IAD - LHR

1 stop9h 47mUnited Airlines

Deal found 14/9£395

Fri 17/1012:45LHR - DCA

1 stop14h 22mVirgin Atlantic

Tue 4/1116:50DCA - LHR

1 stop10h 00mVirgin Atlantic

Deal found 16/9£485

Sun 8/311:10LHR - DCA

1 stop12h 35mAir Canada

Tue 17/312:55DCA - LHR

2 stops14h 15mAir Canada

Deal found 16/9£423

Wed 29/1008:30LHR - IAD

1 stop12h 20mUnited Airlines

Wed 5/1108:45IAD - LHR

2 stops17h 25mUnited Airlines

Deal found 14/9£395

Fri 3/1014:05LHR - DCA

1 stop12h 46mAir Canada

Tue 14/1012:55DCA - LHR

2 stops15h 40mAir Canada

Deal found 16/9£433

Sun 7/1206:30LHR - IAD

1 stop14h 20mUnited Airlines

Tue 13/122:15IAD - LHR

Nonstop7h 35mUnited Airlines

Deal found 14/9£395

Thu 29/109:00LHR - BWI

2 stops17h 41mUnited Airlines

Wed 4/217:18BWI - LHR

1 stop12h 57mUnited Airlines

Deal found 16/9£396

Sun 23/1106:50LHR - IAD

1 stop12h 45mUnited Airlines

Tue 2/1218:20IAD - LHR

Nonstop7h 20mUnited Airlines

Deal found 15/9£397

Thu 5/309:00LHR - BWI

2 stops16h 57mUnited Airlines

Thu 12/310:45BWI - LHR

1 stop15h 10mUnited Airlines

Deal found 17/9£397

Fri 14/1108:30LHR - BWI

2 stops17h 54mUnited Airlines

Thu 4/1213:10BWI - LHR

1 stop11h 45mUnited Airlines

Deal found 16/9£400

Mon 29/906:30LHR - IAD

1 stop12h 00mUnited Airlines

Sun 5/1008:16IAD - LHR

2 stops17h 19mUnited Airlines

Deal found 14/9£400

Sat 7/316:40LHR - IAD

1 stop27h 55mUnited Airlines

Mon 23/308:15IAD - LHR

2 stops18h 55mUnited Airlines

Deal found 14/9£400

Mon 8/1206:50LHR - BWI

2 stops15h 35mUnited Airlines

Tue 16/1210:20BWI - LHR

2 stops15h 10mUnited Airlines

Deal found 16/9£406

Sun 2/1116:20LHR - IAD

Nonstop8h 55mUnited Airlines

Fri 14/1122:15IAD - LHR

Nonstop7h 35mUnited Airlines

Deal found 14/9£416

Thu 2/1012:15LHR - IAD

Nonstop8h 15mUnited Airlines

Sun 7/1218:20IAD - LHR

Nonstop7h 20mUnited Airlines

Deal found 15/9£416

Mon 9/313:25LHR - DCA

1 stop12h 31mUnited Airlines

Tue 17/316:30DCA - LHR

1 stop9h 50mUnited Airlines

Deal found 16/9£418

Mon 8/1209:10LHR - DCA

1 stop11h 43mUnited Airlines

Mon 15/1206:00DCA - LHR

1 stop9h 35mUnited Airlines

Deal found 15/9£422

Direct flights from Heathrow to Washington, D.C.
Explore direct flight options from Heathrow to Washington, D.C. based on user searches, and compare prices and availability for your desired travel dates. Data last updated 17 September 2025.

Fri 3/1016:40LHR - IAD

Nonstop8h 15mLufthansa

Mon 6/1022:25IAD - LHR

Nonstop7h 15mLufthansa

Deal found 15/9£397

Sun 28/912:35LHR - IAD

Nonstop8h 25mVirgin Atlantic

Sun 12/1017:50IAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 14/9£400

Fri 31/1016:25LHR - IAD

Nonstop8h 30mBritish Airways

Mon 3/1118:20IAD - LHR

Nonstop7h 10mBritish Airways

Deal found 15/9£400

Tue 18/1116:50LHR - IAD

Nonstop8h 40mVirgin Atlantic

Wed 3/1222:20IAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 14/9£401

Mon 29/912:35LHR - IAD

Nonstop8h 25mVirgin Atlantic

Mon 6/1017:50IAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 16/9£402

Tue 30/912:35LHR - IAD

Nonstop8h 25mVirgin Atlantic

Thu 9/1017:50IAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 16/9£403

Thu 30/1016:50LHR - IAD

Nonstop8h 40mVirgin Atlantic

Wed 12/1122:20IAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 15/9£405

Wed 7/116:50LHR - IAD

Nonstop8h 40mVirgin Atlantic

Tue 13/122:20IAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 15/9£408

Mon 3/1116:50LHR - IAD

Nonstop8h 40mVirgin Atlantic

Wed 12/1122:20IAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 15/9£408

Fri 31/1016:25LHR - IAD

Nonstop8h 30mBritish Airways

Wed 5/1118:20IAD - LHR

Nonstop7h 10mBritish Airways

Deal found 15/9£409

Tue 25/1115:25LHR - BWI

Nonstop8h 20mBritish Airways

Tue 2/1220:35BWI - LHR

Nonstop7h 05mBritish Airways

Deal found 14/9£409

Fri 26/914:25LHR - IAD

Nonstop8h 05mBritish Airways

Sun 28/917:50IAD - LHR

Nonstop7h 25mBritish Airways

Deal found 16/9£410

Last-minute flights from Heathrow to Washington, D.C.
Discover last-minute flight deals from Heathrow to Washington, D.C.. Data last updated 17 September 2025 and is based on user searches.

Sun 21/908:30LHR - IAD

1 stop11h 45mUnited Airlines

Thu 2/1006:15IAD - LHR

1 stop9h 25mUnited Airlines

Deal found 14/9£395

Mon 22/919:30LHR - IAD

1 stop24h 05mAustrian Airlines

Sun 28/918:40IAD - LHR

Nonstop7h 15mAustrian Airlines

Deal found 15/9£393

Tue 23/915:05LHR - IAD

1 stop28h 30mAustrian Airlines

Mon 29/918:40IAD - LHR

Nonstop7h 15mAustrian Airlines

Deal found 16/9£394

Tue 23/907:30LHR - IAD

1 stop12h 45mUnited Airlines

Thu 2/1006:15IAD - LHR

1 stop9h 25mUnited Airlines

Deal found 16/9£396

Wed 24/908:40LHR - IAD

1 stop12h 35mUnited Airlines

Thu 2/1018:40IAD - LHR

Nonstop7h 15mUnited Airlines

Deal found 16/9£392

Thu 2/1009:55LHR - DCA

2 stops17h 16mVirgin Atlantic

Sun 19/1020:40DCA - LHR

1 stop29h 05mVirgin Atlantic

Deal found 16/9£393

Thu 2/1009:30LHR - IAD

1 stop11h 20mUnited Airlines

Tue 7/1018:40IAD - LHR

Nonstop7h 15mUnited Airlines

Deal found 14/9£394

Thu 2/1006:50LHR - DCA

2 stops14h 01mAir Canada

Sun 7/1211:05DCA - LHR

1 stop15h 05mAir Canada

Deal found 14/9£396

Tue 7/1008:30LHR - IAD

1 stop11h 45mUnited Airlines

Wed 15/1006:15IAD - LHR

1 stop9h 25mUnited Airlines

Deal found 16/9£397

Thu 9/1006:50LHR - DCA

2 stops14h 01mMultiple Airlines

Mon 13/1016:35DCA - LHR

1 stop12h 00mMultiple Airlines

Deal found 16/9£397

Mon 27/1020:05LHR - IAD

1 stop23h 30mSWISS

Fri 7/1120:30IAD - LHR

1 stop14h 50mSWISS

Deal found 15/9£392

Mon 27/1020:25LHR - DCA

2 stops30h 34mVirgin Atlantic

Fri 7/1119:35DCA - LHR

2 stops31h 15mVirgin Atlantic

Deal found 15/9£392

One-way flights from Heathrow to Washington, D.C.
Search for one-way flight options from Heathrow to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated 17 September 2025.

Mon 8/1214:50LHR - BWI

3 stops36h 35mMultiple Airlines

Deal found 16/9£350

Mon 22/921:25LHR - BWI

1 stop25h 15mMultiple Airlines

Deal found 16/9£350

Fri 5/1209:50LHR - BWI

3 stops29h 04mMultiple Airlines

Deal found 15/9£351

Fri 17/1006:40LHR - BWI

2 stops40h 00mMultiple Airlines

Deal found 16/9£352

Thu 6/1112:25LHR - BWI

3 stops35h 52mMultiple Airlines

Deal found 15/9£353

Mon 26/114:50LHR - BWI

2 stops38h 25mMultiple Airlines

Deal found 15/9£354

Tue 4/1109:50LHR - BWI

2 stops28h 00mMultiple Airlines

Deal found 15/9£355

Tue 23/921:25LHR - BWI

1 stop25h 15mMultiple Airlines

Deal found 16/9£356

Sat 18/1007:05LHR - BWI

1 stop15h 35mMultiple Airlines

Deal found 16/9£356

Mon 2/214:50LHR - BWI

2 stops38h 25mMultiple Airlines

Deal found 15/9£357

Mon 13/1021:25LHR - BWI

1 stop25h 15mMultiple Airlines

Deal found 14/9£359

Sun 5/1006:40LHR - BWI

3 stops40h 00mMultiple Airlines

Deal found 15/9£361

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 3/3

09:00-16:40

1 stop12h 40m

Washington, D.C. Dulles Intl

Wed 11/3

19:20-06:40

Nonstop7h 20m

£392

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 8/12

07:40-15:35

1 stop12h 55m

Washington, D.C. Dulles Intl

Tue 13/1

18:20-06:40

Nonstop7h 20m

£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

£394

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 9/10

09:30-15:50

1 stop11h 20m

Washington, D.C. Dulles Intl

Mon 13/10

22:25-10:40

Nonstop7h 15m

£394

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 11/12

12:05-23:21

2 stops16h 16m

Washington, D.C. Dulles Intl

Tue 13/1

17:38-08:25

1 stop9h 47m

£395

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 29/10

08:30-16:50

1 stop12h 20m

Washington, D.C. Dulles Intl

Wed 5/11

08:45-07:10

2 stops17h 25m

£395

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sun 7/12

06:30-15:50

1 stop14h 20m

Washington, D.C. Dulles Intl

Tue 13/1

22:15-10:50

Nonstop7h 35m

£395

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Thu 29/1

09:00-21:41

2 stops17h 41m

Baltimore/Washington

Wed 4/2

17:18-11:15

1 stop12h 57m

£396

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 1/10

06:50-15:51

2 stops14h 01m

Washington, D.C. Reagan-National

Sun 12/10

16:35-09:35

1 stop12h 00m

£397

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sun 23/11

06:50-14:35

1 stop12h 45m

Washington, D.C. Dulles Intl

Tue 2/12

18:20-06:40

Nonstop7h 20m

£397

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 Heathrow to Washington, D.C.

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

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

The best time to book flights from London Heathrow Airport to Washington, D.C. is 44 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 Heathrow Airport to Washington, D.C.?

Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Washington, D.C. (average of £599). Flying from London Heathrow Airport to Washington, D.C. 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 LHR to WAS?

When flying from London Heathrow Airport to Washington, D.C., the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 19% versus a flight in the afternoon.

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

Travellers seeking maximum savings on their London Heathrow Airport to Washington, D.C. flight should consider departing on Wednesday 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 Heathrow Airport to Washington, D.C.

The most flights from LHR to WAS are scheduled on a Monday (28 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (17 on average).

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

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

Reykjavik (KEF) – chosen by Cheapflights users on 29% of one-stop itineraries from London Heathrow Airport to Washington, D.C. on Cheapflights.

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

Reykjavik (KEF) is the most affordable one-stop option, with an average return flight price of £289.

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

Flights via Montreal (YUL) have the shortest average one-way travel time for one-stop routes: 10h 57m.

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

Flights via Zurich (ZRH) offer the fastest connection on this route, with an average stopover time of 1h 13m.

Reviews of airlines servicing Washington, D.C.

Read through reviews of airlines operating flights from London Heathrow Airport to Washington, D.C., 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

1,274 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

544 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

7,407 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

7,363 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 Heathrow Airport to Washington, D.C.?
For as low as £392, United Airlines can have you in Washington, D.C. from London Heathrow Airport in 12h 40m. There are 3664 mi between London Heathrow Airport and Washington, D.C.. This flight may include one or multiple stops.
What are the cheapest airlines flying from London Heathrow Airport to Washington, D.C. round-trip?
According to our current data, Delta (£185), PLAY (£241), and TAP AIR PORTUGAL (£348) offers the cheapest pricing from London Heathrow Airport to Washington, D.C.. Delta is currently priced 67% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from London Heathrow Airport to Washington, D.C. one-way?
The cheapest airline one-way is Aer Lingus, with whom users have recently found tickets for as low as £382. However, be on the lookout for offers from JetBlue and United Airlines, as they are both options that can get you from London Heathrow Airport to Washington, D.C. for a low price.
What are the most popular routes from London Heathrow Airport to Washington, D.C.?
When deciding which route to take from London Heathrow Airport to Washington, D.C. consider London Heathrow - Washington, D.C. Dulles Intl, London Heathrow - Baltimore/Washington or London Heathrow - Washington, D.C. Reagan-National as they are the most popular.
What are the most reliable airlines from London Heathrow Airport to Washington, D.C.?
Consider KLM (90%), Air France (90%) or Delta (90%) when booking your flight. These represent the most reliable airlines when flying from London Heathrow Airport to Washington, D.C..
What are the cheapest flights from London Heathrow Airport to Washington, D.C.?
Looking for the cheapest flight from London Heathrow Airport to Washington, D.C.? While on average our users pay £1,277, our data indicates the cheapest price to be £382. The most popular route (London Heathrow - Washington, D.C. Dulles Intl), is priced around £323.
Where are the most common stopover locations when flying from London Heathrow Airport to Washington, D.C.?
The most popular stopover on flights from London Heathrow Airport to Washington, D.C. is Dublin.
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 Heathrow Airport to Washington, D.C. flights?
London Heathrow Airport to Washington, D.C. flights have a stopover in Reykjavik the least frequently.
Can I find deals for flights from Heathrow to Washington, D.C. that include hotel bookings?
Yes. In addition to deals on Heathrow to Washington, D.C. flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Heathrow to Washington, D.C.?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Washington, D.C..
Can I find deals for business class flights from Heathrow to Washington, D.C.?
Yes. Cheapflights offers flight deals from Heathrow to Washington, D.C. 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 Heathrow Airport to Washington, D.C.?
Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Washington, D.C. (average of £599). Flying from London Heathrow Airport to Washington, D.C. 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 Heathrow to Washington, D.C.

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest£185	Average£526	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
PLAY	Cheapest£241	Average£387	FlexibilityNo cancel fee	On-timeN/A	Search PLAY flights
TAP AIR PORTUGAL	Cheapest£348	Average£502	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Icelandair	Cheapest£357	Average£494	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
JetBlue	Cheapest£369	Average£618	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Aer Lingus	Cheapest£392	Average£689	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
United Airlines	Cheapest£393	Average£604	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Finnair	Cheapest£427	Average£604	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Lufthansa	Cheapest£430	Average£613	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Scandinavian Airlines	Cheapest£431	Average£571	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights

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How does Cheapflights help users find flights from Heathrow to Washington, D.C.?

Cheapflights makes it easy to find Heathrow to Washington, D.C. flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Washington, D.C.?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Washington, D.C. from Heathrow.

Can Cheapflights find flights from Heathrow to Washington, D.C. with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Heathrow to Washington, D.C. flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Heathrow to Washington, D.C. become cheaper?

Yes, Cheapflights offers price alerts on Heathrow to Washington, D.C. flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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Cheap flights from London Heathrow Airport to Washington, D.C. from £350

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 8/12. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from London Heathrow to Washington, D.C. are usually found in September or February, booked 44 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

Cheap flight deals from Heathrow to Washington, D.C.

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Find flight deals from Heathrow to Washington, D.C.

Cheapest flights from Heathrow to Washington, D.C.Explore the most affordable flight options available from Heathrow to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2025.

Explore the most affordable flight options available from Heathrow to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Heathrow to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Heathrow with our price prediction graph.

Cheapflights Insights

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

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

Use this chart to determine the optimal time to book a return flight from Heathrow to Washington, D.C.. Price data was last updated on 12 September 2025.

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

What is the cheapest time of day to fly from LHR to WAS?

Find hourly flight availability from Heathrow to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 September 2025.

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

Use this chart to determine the cheapest time to fly return from Heathrow to Washington, D.C.. Price data was last updated on 16 December 2024.

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

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

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

Share of one-stop return flights from London Heathrow Airport to Washington, D.C. 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 Heathrow Airport to Washington, D.C.?

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

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

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

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

Reviews of airlines servicing Washington, D.C.

Read through reviews of airlines operating flights from London Heathrow Airport to Washington, D.C., 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 Heathrow to Washington, D.C.. 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 Heathrow Airport to Washington, D.C.?

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

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

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

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

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

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

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

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

Can I find deals for flights from Heathrow to Washington, D.C. that include hotel bookings?

How can I find direct flights from Heathrow to Washington, D.C.?

Can I find deals for business class flights from Heathrow to Washington, D.C.?

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

Travelling to a place near Washington, D.C.?

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Fly from Heathrow to Washington, D.C. on these airlines

Choose from the following airlines for your flight from Heathrow to Washington, D.C.. Flights are based on user searches made on Cheapflights and were last updated on 17 September 2025.

Top 10 airlines flying from Heathrow to Washington, D.C.

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How does Cheapflights help users find flights from Heathrow to Washington, D.C.?

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Washington, D.C.?

Can Cheapflights find flights from Heathrow to Washington, D.C. with no change fees?

Can Cheapflights notify me if prices for flights from Heathrow to Washington, D.C. become cheaper?

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Cheapest flights from Heathrow to Washington, D.C.
Explore the most affordable flight options available from Heathrow to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2025.