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

There are many flights that can get you from Washington, D.C. to London Heathrow Airport in 7h 35m. Fly via Scandinavian Airlines, United Airlines, or Virgin Atlantic to get the fastest option. The distance between Washington, D.C. and London Heathrow Airport is about 3664 mi. This flight may include one or multiple stops.

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

Flying on TAP AIR PORTUGAL is currently your cheapest option to London Heathrow Airport, with prices starting at $420. Additional round-trip tickets that might be worth considering are offered by Virgin Atlantic and Iberia, with the lowest prices starting at $449 and $484, respectively. TAP AIR PORTUGAL is currently priced 53% below the average price you’ll pay for this route.

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

One-way options have recently been found by users for as low as $229 on KLM. Other airlines that offer cheap prices include Icelandair from $244 and JetBlue from $300 one-way.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London Heathrow Airport when rainfall is around 1.6 in.

If weather is an important factor for your trip to London Heathrow 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 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

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

The most popular flight routes from Washington, D.C. to London Heathrow Airport are Washington, D.C. Dulles Intl - London Heathrow, Baltimore/Washington - London Heathrow and Washington, D.C. Reagan-National - London Heathrow.

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

Looking at all options, your cheapest flight can be booked for $354. While the most popular route (Washington, D.C. Dulles Intl - London Heathrow) can be booked for $545 on average, our data indicates $3,160 when flying from Washington, D.C. to London Heathrow Airport.

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

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. to London Heathrow Airport on time: SAUDIA (69%), Aer Lingus (68%), Iberia (68%).

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

Consider British Airways, United Airlines or American Airlines when booking your flight. These represent the most popular airlines when flying from Washington, D.C. to London Heathrow Airport.

Most accurate provider : When it comes to deals on Washington, D.C.-London Heathrow Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C.-London Heathrow Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C.-London Heathrow Airport flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Washington, D.C.-London Heathrow Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C.-London Heathrow Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

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

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

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

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

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

$283+ Cheap Flights from Washington, D.C. to London Heathrow Airport

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Cheapflights Tip: The best prices from Washington, D.C. to London Heathrow are usually found in February or January, booked 86 days in advance, depart on a Wednesday or Monday and return on a Thursday

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

Cheapest

Best

Last-minute

One-way

Cheapest flights from Washington, D.C. to Heathrow
Explore the most affordable flight options available from Washington, D.C. to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 7, 2026.

Tue 10/2011:20 pm -

2 stops14h 10m

Tue 10/276:40 am -

2 stops17h 00m

Deal found 9/6

$681

Sun 11/17:40 pm -

2 stops32h 40m

Thu 11/57:30 pm -

2 stops28h 10m

Deal found 9/6

$683

Wed 11/257:40 pm -

1 stop18h 50m

Wed 4/79:25 pm -

1 stop27h 00m

Deal found 9/3

$684

Sun 11/227:40 pm -

2 stops32h 55m

Thu 11/266:35 am -

2 stops17h 05m

Deal found 9/6

$685

Mon 11/97:40 pm -

2 stops32h 40m

Fri 11/137:30 pm -

2 stops28h 10m

Deal found 9/6

$686

Mon 11/97:40 pm -

1 stop10h 10m

Thu 4/151:05 pm -

1 stop11h 20m

Deal found 9/5

$687

Fri 10/238:30 pm -

1 stop10h 25m

Tue 11/312:15 pm -

1 stop11h 25m

Deal found 9/4

$688

Sun 10/188:30 pm -

1 stop10h 25m

Thu 10/2912:15 pm -

1 stop11h 25m

Deal found 9/4

$689

Tue 10/138:30 pm -

1 stop10h 25m

Fri 10/3012:15 pm -

1 stop11h 25m

Deal found 9/3

$690

Thu 10/1511:20 pm -

1 stop16h 00m

Fri 10/3012:15 pm -

1 stop11h 25m

Deal found 9/4

$691

Thu 12/107:40 pm -

1 stop10h 10m

Tue 1/1212:15 pm -

1 stop11h 25m

Deal found 9/2

$692

Tue 10/138:30 pm -

1 stop10h 25m

Wed 10/288:35 pm -

1 stop27h 05m

Deal found 9/6

$693

Best flights from Washington, D.C. to Heathrow
Discover carefully curated flight deals from Washington, D.C. to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 7, 2026.

Sun 10/118:20 pm -

2 stops44h 15m

Wed 10/149:05 pm -

2 stops24h 55m

Deal found 9/2

$716

Tue 10/278:40 pm -

1 stop10h 10m

Sun 11/11:50 pm -

Nonstop8h 15m

Deal found 9/6

$816

Tue 10/610:05 pm -

Nonstop7h 35m

Tue 10/139:55 am -

1 stop10h 40m

Deal found 9/6

$852

Wed 10/2811:15 pm -

Nonstop7h 35m

Wed 11/46:50 am -

1 stop12h 40m

Deal found 9/4

$852

Tue 10/2712:00 pm -

2 stops15h 45m

Tue 11/1011:45 am -

2 stops16h 42m

Deal found 9/6

$871

Sat 10/241:15 pm -

1 stop13h 40m

Fri 10/309:20 am -

1 stop12h 40m

Deal found 9/4

$896

Mon 11/95:12 pm -

1 stop10h 23m

Tue 11/2412:35 pm -

1 stop12h 24m

Deal found 9/4

$904

Thu 10/1511:20 pm -

1 stop16h 00m

Fri 10/239:25 pm -

1 stop27h 00m

Deal found 9/5

$981

Sun 10/118:20 pm -

1 stop17h 10m

Tue 10/207:50 pm -

2 stops45h 00m

Deal found 9/6

$806

Tue 10/2711:15 pm -

Nonstop7h 35m

Tue 11/106:35 am -

1 stop18h 30m

Deal found 9/6

$852

Mon 11/166:20 pm -

Nonstop7h 20m

Wed 12/211:05 am -

1 stop32h 25m

Deal found 9/6

$865

Wed 10/1412:37 pm -

2 stops15h 13m

Tue 10/2011:30 am -

2 stops16h 34m

Deal found 9/2

$878

Thu 9/178:20 pm -

2 stops18h 35m

Sun 9/206:40 am -

2 stops15h 20m

Deal found 9/2

$811

Tue 11/31:09 pm -

1 stop12h 46m

Mon 11/99:20 am -

1 stop11h 35m

Deal found 9/4

$896

Wed 2/105:17 pm -

1 stop9h 53m

Wed 2/1712:55 pm -

1 stop11h 03m

Deal found 9/6

$905

Wed 11/1110:15 pm -

Nonstop7h 35m

Tue 11/2411:10 am -

1 stop13h 55m

Deal found 9/6

$852

Mon 10/1212:37 pm -

2 stops15h 13m

Thu 10/2911:30 am -

2 stops15h 34m

Deal found 9/4

$879

Sat 12/56:15 am -

1 stop10h 25m

Wed 1/1312:20 pm -

1 stop15h 39m

Deal found 9/2

$897

Wed 10/284:55 pm -

1 stop10h 05m

Tue 11/31:10 pm -

1 stop11h 05m

Deal found 9/6

$905

Tue 10/612:30 pm -

2 stops16h 05m

Thu 11/126:40 am -

1 stop15h 35m

Deal found 9/3

$830

Thu 10/2211:20 pm -

1 stop31h 35m

Sun 10/2512:15 pm -

1 stop11h 25m

Deal found 9/6

$1,021

Thu 10/2912:34 pm -

1 stop15h 21m

Mon 11/911:05 am -

2 stops37h 04m

Deal found 9/5

$929

Mon 10/1210:05 pm -

Nonstop7h 35m

Mon 10/196:40 pm -

1 stop27h 05m

Deal found 9/3

$853

Sun 10/116:10 am -

1 stop9h 35m

Thu 10/158:40 am -

1 stop11h 07m

Deal found 9/2

$897

Thu 9/178:20 pm -

2 stops18h 35m

Wed 9/239:05 pm -

2 stops24h 55m

Deal found 9/2

$841

Tue 11/36:55 pm -

Nonstop7h 10m

Sun 11/81:50 pm -

Nonstop8h 15m

Deal found 9/4

$940

Wed 10/219:50 am -

2 stops15h 55m

Mon 10/2612:55 pm -

2 stops15h 56m

Deal found 9/1

$951

Mon 10/57:10 pm -

1 stop11h 45m

Sun 10/118:00 am -

1 stop15h 13m

Deal found 9/6

$976

Thu 12/106:15 am -

1 stop10h 25m

Thu 1/149:20 am -

1 stop11h 59m

Deal found 9/2

$901

Tue 10/1311:05 am -

2 stops17h 30m

Tue 10/207:05 am -

2 stops20h 50m

Deal found 9/6

$848

Last-minute flights from Washington, D.C. to Heathrow
Discover last-minute flight deals from Washington, D.C. to Heathrow. Data last updated September 7, 2026 and is based on user searches.

Tue 9/298:30 pm -

1 stop10h 25m

Tue 10/139:25 pm -

1 stop27h 00m

Deal found 9/5

$698

Mon 10/128:30 pm -

1 stop10h 25m

Fri 10/3012:15 pm -

1 stop11h 25m

Deal found 9/6

$692

Tue 10/138:30 pm -

1 stop10h 25m

Fri 10/3012:15 pm -

1 stop11h 25m

Deal found 9/3

$690

Tue 10/138:30 pm -

1 stop10h 25m

Wed 10/288:35 pm -

1 stop27h 05m

Deal found 9/6

$693

Tue 10/138:30 pm -

1 stop10h 25m

Thu 10/229:25 pm -

1 stop27h 00m

Deal found 9/2

$694

Thu 10/1511:20 pm -

1 stop16h 00m

Fri 10/3012:15 pm -

1 stop11h 25m

Deal found 9/4

$691

Sat 10/1711:20 pm -

1 stop31h 35m

Mon 11/28:35 pm -

1 stop27h 05m

Deal found 9/6

$695

Sat 10/1711:20 pm -

2 stops14h 30m

Thu 10/226:40 am -

2 stops20h 35m

Deal found 9/3

$697

Sun 10/188:30 pm -

1 stop10h 25m

Thu 10/2912:15 pm -

1 stop11h 25m

Deal found 9/4

$689

Tue 10/2011:20 pm -

2 stops14h 10m

Tue 10/276:40 am -

2 stops17h 00m

Deal found 9/6

$681

Fri 10/238:30 pm -

1 stop10h 25m

Wed 11/412:15 pm -

1 stop11h 25m

Deal found 9/4

$688

Mon 10/268:40 pm -

2 stops15h 20m

Fri 10/306:40 am -

2 stops17h 00m

Deal found 9/5

$687

One-way flights from Washington, D.C. to Heathrow
Search for one-way flight options from Washington, D.C. to Heathrow. Find affordable one-way fares based on user searches. Data last updated September 7, 2026.

Mon 11/97:40 pm -

1 stop10h 10m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/6

$283

Sun 11/17:40 pm -

1 stop10h 10m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/5

$291

Sat 10/178:30 pm -

1 stop10h 25m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/1

$295

Wed 11/47:40 pm -

1 stop18h 50m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/6

$296

Tue 10/138:30 pm -

1 stop18h 50m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/2

$297

Thu 10/2211:20 pm -

1 stop31h 35m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/6

$299

Wed 11/257:40 pm -

1 stop18h 50m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/2

$300

Thu 10/1511:20 pm -

1 stop16h 00m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/2

$301

Fri 11/67:40 pm -

1 stop18h 50m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/2

$302

Sat 10/38:30 pm -

1 stop10h 25m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/3

$304

Tue 11/37:40 pm -

1 stop18h 50m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/3

$308

Sun 10/411:20 pm -

1 stop31h 35m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/6

$327

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

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$681 (Mytrip)
One-way from	$283 (eDestinos)
Popular in	June
Cheapest in	February
Average price	$946
Good round-trip deal	$944 or less
Good one-way deal	$445 or less

Provider with most accurate pricing for Washington, D.C. (WAS)-London Heathrow flight deals.

Search Deals

Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-London Heathrow flights.

Search Deals

From Washington, D.C. (WAS) to London Heathrow

Search Deals

One-way flight from Washington, D.C. (WAS) to London Heathrow

Search Deals

Highest demand for flights based on searches. 19% potential increase in price ($223 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($35 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

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

Search Deals

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

Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.London

DCA Washington, D.C. Reagan-National - LHR London Heathrow

DCALHR

Washington, D.C. Reagan-National

Sun 1/10

6:00 am-7:10 am

1 stop20h 10m

London Heathrow

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$328

Washington, D.C.London

DCA Washington, D.C. Reagan-National - LHR London Heathrow

DCALHR

Washington, D.C. Reagan-National

Mon 9/28

1:15 pm-6:30 am

1 stop12h 15m

London Heathrow

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$329

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Tue 10/27

5:30 pm-3:40 pm

1 stop18h 10m

London Heathrow

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$334

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Sat 3/6

10:10 pm-5:55 am

1 stop26h 45m

London Heathrow

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$340

Washington, D.C.London

DCA Washington, D.C. Reagan-National - LHR London Heathrow

DCALHR

Washington, D.C. Reagan-National

Sun 12/27

4:50 pm-6:55 am

1 stop9h 05m

London Heathrow

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$341

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Thu 11/26

4:30 pm-3:40 pm

1 stop18h 10m

London Heathrow

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$354

Washington, D.C.London

DCA Washington, D.C. Reagan-National - LHR London Heathrow

DCALHR

Washington, D.C. Reagan-National

Wed 12/16

2:55 pm-6:15 am

1 stop10h 20m

London Heathrow

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$375

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Fri 3/5

9:45 pm-10:00 am

Nonstop7h 15m

London Heathrow

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$375

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Sat 2/27

10:30 pm-10:50 am

Nonstop7h 20m

London Heathrow

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$375

Quickest round-trip

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Thu 3/4

6:05 pm-6:15 am

Nonstop7h 10m

London Heathrow

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$375

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/3

Showing 1-10 of 60 resultsSorted by cheapest first

...

Compare providers for flights from Washington, D.C. to Heathrow

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Washington, D.C. to Heathrow in September.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy3 stars	Trust Score*3 stars
Ovago	Price Accuracy3 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy2 stars	Trust Score*1 star
BusinessClass	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy2 stars	Trust Score*3 stars
Gotogate	Price Accuracy2 stars	Trust Score*3 stars
CheapTicketsDeal	Price Accuracy1 star	Trust Score*3 stars
JustAirTicket	Price Accuracy-	Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Washington, D.C.-London Heathrow Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C.-London Heathrow Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C.-London Heathrow Airport flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Washington, D.C.-London Heathrow Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C.-London Heathrow Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

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

WAS-LHR

DCA-LHR

IAD-LHR

BWI-LHR

Estimated round-trip 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. to London Heathrow Airport

WAS-LHR

DCA-LHR

IAD-LHR

BWI-LHR

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

Currently, February is the cheapest month in which you can book a flight from Washington, D.C. to London Heathrow Airport (average of $688). Flying from Washington, D.C. to London Heathrow Airport in June is currently the most expensive (average of $1,304). 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 WAS to LHR?

When flying from Washington, D.C. to London Heathrow Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

The most flights from WAS to LHR are scheduled on a Thursday (29 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (10 on average).

How much does it cost to fly round-trip from Washington, D.C. to London Heathrow Airport?

Airfare is below average for this route at the moment.

Washington, D.C. to London Heathrow Airport flights typically cost between $745 and $1,133 in October.
The cheapest round-trip price found within the last 5 days was $681 on Multiple Airlines (Oct 20-Oct 27).

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

New York (JFK) – chosen by Cheapflights users on 55% of 1-stop itineraries from Washington, D.C. to London Heathrow Airport on Cheapflights.

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

Zurich (ZRH) is the most affordable 1-stop option, with an average round-trip price of $593.

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

Flights via Newark (EWR) have the shortest average one-way travel time for 1-stop routes: 9h 35m.

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

Flights via Zurich (ZRH) offer the fastest connection on this route, with an average layover time of 1h 23m.

How often are flights from Washington, D.C. to London delayed?

About 18% of weekly flights between Washington, D.C. and London have experienced delays in the past year, with the average delay time being 173 minutes.

What is the most punctual flight time for Washington, D.C. to London flights?

Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Monday tends to have the lowest number of delays on this route, whereas Wednesday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Washington, D.C. to London flights?

Over the last year, Virgin Atlantic have had the lowest number of delays on this route, with just 13% of flights being delayed.

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

Booking 65 days in advance of your planned departure date is, on average, the best time to get cheap flights from Washington, D.C. to London Heathrow Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

The best insider tips for Washington, D.C. to London Heathrow Airport flights

Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. to London Heathrow Airport trip

Our travel experts

Ramsey Qubein

Expert on LHR and IAD

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Peruse reviews from past customers who have flown with United Airlines,Virgin Atlantic, andAmerican Airlines from Washington, D.C. to London Heathrow Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

10,174 reviews

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

United Airlines

7.4

Good

10,174 reviews

United Airlines

7.4

Good

10,174 reviews

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

Virgin Atlantic

7.4

Good

694 reviews

United Airlines

7.4

Good

10,174 reviews

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

American Airlines

7.1

Good

12,044 reviews

United Airlines

7.4

Good

10,174 reviews

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

Icelandair

6.9

Okay

741 reviews

United Airlines

7.4

Good

10,174 reviews

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

British Airways

6.7

Okay

8,210 reviews

United Airlines

7.4

Good

10,174 reviews

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

Related info for your journey

How long is the flight from Washington, D.C. to London Heathrow Airport?
There are many flights that can get you from Washington, D.C. to London Heathrow Airport in 7h 35m. Fly via Scandinavian Airlines, United Airlines, or Virgin Atlantic to get the fastest option. The distance between Washington, D.C. and London Heathrow Airport is about 3664 mi. This flight may include one or multiple stops.
What are the cheapest airlines flying from Washington, D.C. to London Heathrow Airport round-trip?
Flying on TAP AIR PORTUGAL is currently your cheapest option to London Heathrow Airport, with prices starting at $420. Additional round-trip tickets that might be worth considering are offered by Virgin Atlantic and Iberia, with the lowest prices starting at $449 and $484, respectively. TAP AIR PORTUGAL is currently priced 53% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from Washington, D.C. to London Heathrow Airport one-way?
One-way options have recently been found by users for as low as $229 on KLM. Other airlines that offer cheap prices include Icelandair from $244 and JetBlue from $300 one-way.
What are the most popular routes from Washington, D.C. to London Heathrow Airport?
The most popular flight routes from Washington, D.C. to London Heathrow Airport are Washington, D.C. Dulles Intl - London Heathrow, Baltimore/Washington - London Heathrow and Washington, D.C. Reagan-National - London Heathrow.
What are the most reliable airlines from Washington, D.C. to London Heathrow Airport?
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. to London Heathrow Airport on time: SAUDIA (69%), Aer Lingus (68%), Iberia (68%).
What are the cheapest flights from Washington, D.C. to London Heathrow Airport?
Looking at all options, your cheapest flight can be booked for $354. While the most popular route (Washington, D.C. Dulles Intl - London Heathrow) can be booked for $545 on average, our data indicates $3,160 when flying from Washington, D.C. to London Heathrow Airport.
Can I find deals for flights from Washington, D.C. to Heathrow that include hotel bookings?
Yes. In addition to deals on Washington, D.C. to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Washington, D.C. to Heathrow?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Heathrow.
Can I find deals for business class flights from Washington, D.C. to Heathrow?
Yes. Cheapflights offers flight deals from Washington, D.C. to Heathrow 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. to London Heathrow Airport?
Currently, February is the cheapest month in which you can book a flight from Washington, D.C. to London Heathrow Airport (average of $688). Flying from Washington, D.C. to London Heathrow Airport in June is currently the most expensive (average of $1,304). 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 Washington, D.C. to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
TAP AIR PORTUGAL	Cheapest$420	Average$646	FlexibilityNo cancel fee	On-timeN/A
Virgin Atlantic	Cheapest$449	Average$891	FlexibilityNo cancel fee	On-time72%
United Airlines	Cheapest$462	Average$927	FlexibilityNo cancel fee	On-time69%
Icelandair	Cheapest$479	Average$713	FlexibilityNo cancel fee	On-time76%
Iberia	Cheapest$484	Average$885	FlexibilityNo cancel fee	On-time77%
Delta	Cheapest$508	Average$962	FlexibilityNo cancel fee	On-timeN/A
Scandinavian Airlines	Cheapest$568	Average$805	FlexibilityNo cancel fee	On-time77%
Air Canada	Cheapest$577	Average$887	FlexibilityNo cancel fee	On-time67%
Air France	Cheapest$581	Average$1,067	FlexibilityNo cancel fee	On-time77%
British Airways	Cheapest$593	Average$922	FlexibilityNo cancel fee	On-time70%

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$283+ Cheap flights from Washington, D.C. (WAS) to Heathrow (LHR)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/9. Fares are subject to change and may not be available on all flights or dates of travel.

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

Cheapest flights from Washington, D.C. to HeathrowExplore the most affordable flight options available from Washington, D.C. to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 7, 2026.

Explore the most affordable flight options available from Washington, D.C. to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 7, 2026.

Best flights from Washington, D.C. to HeathrowDiscover carefully curated flight deals from Washington, D.C. to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 7, 2026.

Discover carefully curated flight deals from Washington, D.C. to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 7, 2026.

Last-minute flights from Washington, D.C. to HeathrowDiscover last-minute flight deals from Washington, D.C. to Heathrow. Data last updated September 7, 2026 and is based on user searches.

Discover last-minute flight deals from Washington, D.C. to Heathrow. Data last updated September 7, 2026 and is based on user searches.

One-way flights from Washington, D.C. to HeathrowSearch for one-way flight options from Washington, D.C. to Heathrow. Find affordable one-way fares based on user searches. Data last updated September 7, 2026.

Search for one-way flight options from Washington, D.C. to Heathrow. Find affordable one-way fares based on user searches. Data last updated September 7, 2026.

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

Compare providers for flights from Washington, D.C. to Heathrow

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Washington, D.C. to Heathrow in September.

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

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

Cheapflights Insights

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

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

Find hourly flight availability from Washington, D.C. to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 7, 2026.

When flying from Washington, D.C. to London Heathrow Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

The most flights from WAS to LHR are scheduled on a Thursday (29 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (10 on average).

How much does it cost to fly round-trip from Washington, D.C. to London Heathrow Airport?

Airfare is below average for this route at the moment.

Washington, D.C. to London Heathrow Airport flights typically cost between $745 and $1,133 in October.The cheapest round-trip price found within the last 5 days was $681 on Multiple Airlines (Oct 20-Oct 27).

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

Share of 1-stop round-trip flights from Washington, D.C. to London Heathrow Airport chosen by Cheapflights users in the past 12 months, using the same layover each way.

New York (JFK) – chosen by Cheapflights users on 55% of 1-stop itineraries from Washington, D.C. to London Heathrow Airport on Cheapflights.

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

Average round-trip fare for 1-stop flights from Washington, D.C. to London Heathrow Airport, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Zurich (ZRH) is the most affordable 1-stop option, with an average round-trip price of $593.

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

Shortest average travel time for 1-stop one-way flights from Washington, D.C. to London Heathrow Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Newark (EWR) have the shortest average one-way travel time for 1-stop routes: 9h 35m.

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

Average layover duration for 1-stop one-way flights from Washington, D.C. to London Heathrow Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Zurich (ZRH) offer the fastest connection on this route, with an average layover time of 1h 23m.

How often are flights from Washington, D.C. to London delayed?

About 18% of weekly flights between Washington, D.C. and London have experienced delays in the past year, with the average delay time being 173 minutes.

What is the most punctual flight time for Washington, D.C. to London flights?

Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Monday tends to have the lowest number of delays on this route, whereas Wednesday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Washington, D.C. to London flights?

Over the last year, Virgin Atlantic have had the lowest number of delays on this route, with just 13% of flights being delayed.

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

Booking 65 days in advance of your planned departure date is, on average, the best time to get cheap flights from Washington, D.C. to London Heathrow Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

The best insider tips for Washington, D.C. to London Heathrow Airport flights

AI-powered summary based on content written by travel experts. AI can make mistakes.

Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. to London Heathrow Airport trip

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Reviews of airlines servicing Heathrow

Related info for your journey

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

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

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

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

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

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

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

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

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

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

Cheapest flights from Washington, D.C. to Heathrow
Explore the most affordable flight options available from Washington, D.C. to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 7, 2026.

Best flights from Washington, D.C. to Heathrow
Discover carefully curated flight deals from Washington, D.C. to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 7, 2026.

Last-minute flights from Washington, D.C. to Heathrow
Discover last-minute flight deals from Washington, D.C. to Heathrow. Data last updated September 7, 2026 and is based on user searches.

One-way flights from Washington, D.C. to Heathrow
Search for one-way flight options from Washington, D.C. to Heathrow. Find affordable one-way fares based on user searches. Data last updated September 7, 2026.

Washington, D.C. to London Heathrow Airport flights typically cost between $745 and $1,133 in October.
The cheapest round-trip price found within the last 5 days was $681 on Multiple Airlines (Oct 20-Oct 27).