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$345+ Cheap flights from Washington, D.C. (WAS) to Heathrow (LHR)

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 7/4. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — LHR
Jun 21 — Jun 281
Sun 6/21
Sun 6/28
1 adult, Economy
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1. Tell us where you want to go

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3. Compare prices and book

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Cheapflights Tip: The best prices from Washington, D.C. to London Heathrow are usually found in August or February, booked 73 days in advance, depart on a Wednesday or Tuesday and return on a Thursday

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

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 May 22, 2026.

This oojo deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/198:30 pm
BWI
-
LHR
1 stop10h 25m
Icelandair
Mon 8/241:05 pm
LHR
-
BWI
1 stop11h 20m
Icelandair
Deal found 5/18$823
This Cheapflightsfares deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/18:20 pm
IAD
-
LHR
2 stops15h 05m
Scandinavian Airlines
Sun 10/1110:20 am
LHR
-
IAD
1 stop11h 40m
Scandinavian Airlines
Deal found 5/18$840
This oojo deal was found by Cheapflights users on 5/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/128:30 pm
BWI
-
LHR
1 stop18h 50m
Icelandair
Fri 10/169:25 pm
LHR
-
BWI
1 stop29h 50m
Icelandair
Deal found 5/20$842
This Kiwi.com deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/18:30 pm
IAD
-
LHR
1 stop10h 25m
Icelandair
Thu 8/139:25 pm
LHR
-
IAD
1 stop29h 50m
Icelandair
Deal found 5/18$842
This oojo deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/188:30 pm
BWI
-
LHR
1 stop18h 50m
Icelandair
Tue 8/189:25 pm
LHR
-
BWI
1 stop29h 50m
Icelandair
Deal found 5/17$843
This Cheapflightsfares deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/168:20 pm
IAD
-
LHR
1 stop12h 15m
Scandinavian Airlines
Wed 10/219:05 pm
LHR
-
IAD
2 stops24h 55m
Scandinavian Airlines
Deal found 5/18$843
This oojo deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/118:30 pm
BWI
-
LHR
1 stop10h 25m
Icelandair
Fri 10/169:25 pm
LHR
-
BWI
1 stop29h 50m
Icelandair
Deal found 5/17$844
This Cheapflightsfares deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/18:20 pm
IAD
-
LHR
2 stops15h 05m
Scandinavian Airlines
Mon 10/57:05 am
LHR
-
IAD
2 stops14h 55m
Scandinavian Airlines
Deal found 5/17$844
This oojo deal was found by Cheapflights users on 5/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/48:30 pm
BWI
-
LHR
1 stop10h 25m
Icelandair
Thu 8/209:25 pm
LHR
-
BWI
1 stop27h 00m
Icelandair
Deal found 5/20$845
This deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/308:30 pm
BWI
-
LHR
1 stop10h 25m
Icelandair
Wed 6/31:05 pm
LHR
-
BWI
1 stop11h 20m
Icelandair
Deal found 5/19$846
This Austrian Airlines deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/106:30 pm
IAD
-
LHR
Nonstop7h 25m
Austrian Airlines
Tue 8/189:05 am
LHR
-
IAD
1 stop34h 30m
Austrian Airlines
Deal found 5/17$846
This Orbitz deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/245:45 pm
IAD
-
LHR
Nonstop7h 35m
Iberia
Tue 9/156:15 am
LHR
-
IAD
1 stop14h 15m
Iberia
Deal found 5/17$847

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

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$823
(oojo)

One-way from

$345
(Mytrip)

Popular in

June

Cheapest in

August

Average price

$936

Good round-trip deal

$992 or less

Good one-way deal

$482 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. 20% potential increase in price ($205 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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

 
Customize your flight search to find flights from Washington, D.C. to Heathrow that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 22, 2026.
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

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Mon 8/10

12:30 pm-8:50 am

2 stops15h 20m

London Heathrow

Wed 9/9

9:55 am-8:51 pm

2 stops15h 56m

$870

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Mon 8/3

6:30 pm-6:55 am

Nonstop7h 25m

London Heathrow

Mon 8/17

12:10 pm-4:45 pm

1 stop33h 35m

$891

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 7/26

8:30 pm-11:55 am

1 stop10h 25m

London Heathrow

Thu 8/6

9:25 pm-7:20 pm

1 stop26h 55m

$909
Quickest round-trip

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 8/4

10:55 pm-11:20 am

Nonstop7h 25m

London Heathrow

Fri 8/14

5:55 pm-8:55 pm

Nonstop8h 00m

$917

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sat 8/15

10:41 pm-8:40 pm

1 stop16h 59m

London Heathrow

Mon 9/14

12:15 pm-3:30 pm

Nonstop8h 15m

$929

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Sat 8/15

6:00 am-9:25 pm

1 stop10h 25m

London Heathrow

Wed 8/19

2:10 pm-12:00 pm

1 stop26h 50m

$934

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Fri 8/14

12:30 pm-7:15 am

2 stops13h 45m

London Heathrow

Sat 8/22

9:20 am-5:15 pm

1 stop12h 55m

$1,000

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Tue 7/28

9:30 pm-9:50 am

Nonstop7h 20m

London Heathrow

Thu 8/6

4:25 pm-7:40 pm

Nonstop8h 15m

$1,014

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Thu 8/6

9:30 pm-9:50 am

Nonstop7h 20m

London Heathrow

Thu 8/13

3:00 pm-9:58 pm

1 stop11h 58m

$1,018

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Thu 8/6

5:55 pm-9:25 pm

1 stop22h 30m

London Heathrow

Sun 8/16

2:05 pm-10:18 am

1 stop25h 13m

$1,024

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/17

Showing 1-10 of 60 resultsSorted by cheapest first
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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 May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*1 star
JustAirTicketPrice 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.
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

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

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. to London Heathrow Airport (average of $281). Flying from Washington, D.C. to London Heathrow Airport in December is currently the most expensive (average of $1,299). 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?

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 May 22, 2026.

It’s typically best to fly out from Washington, D.C. to London Heathrow Airport in the morning. Doing so could potentially save you 50% on the flight price compared to flying at noon, which is usually more expensive.

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

Explore weekly flight availability from Washington, D.C. to Heathrow. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated May 22, 2026.

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

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

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 64% 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.

Reykjavik (KEF) is the most affordable 1-stop option, with an average round-trip price of $560.

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 19% of weekly flights between Washington, D.C. and London have experienced delays in the past year, with the average delay time being 170 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 Friday 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 15% of flights being delayed.

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

Booking 72 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
Our travel experts
Ramsey Qubein

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.

Read more

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated May 22, 2026.
Peruse reviews from past customers who have flown with Delta,Virgin Atlantic, andUnited 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.
Delta
7.9
Good
8,445 reviews

Boarding

8.1

Food

7.2

Crew

8.5

Entertainment

7.8

Comfort

7.8

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Delta
7.9
Good
8,445 reviews
Delta
7.9
Good
8,445 reviews

Boarding

8.1

Food

7.2

Crew

8.5

Entertainment

7.8

Comfort

7.8

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Virgin Atlantic
7.5
Good
689 reviews
Delta
7.9
Good
8,445 reviews

Boarding

8.1

Food

7.2

Crew

8.5

Entertainment

7.8

Comfort

7.8

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
United Airlines
7.4
Good
9,752 reviews
Delta
7.9
Good
8,445 reviews

Boarding

8.1

Food

7.2

Crew

8.5

Entertainment

7.8

Comfort

7.8

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
American Airlines
7.1
Good
11,645 reviews
Delta
7.9
Good
8,445 reviews

Boarding

8.1

Food

7.2

Crew

8.5

Entertainment

7.8

Comfort

7.8

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
British Airways
6.7
Okay
7,995 reviews
Delta
7.9
Good
8,445 reviews

Boarding

8.1

Food

7.2

Crew

8.5

Entertainment

7.8

Comfort

7.8

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

Related info for your journey

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

    There are many flights that can get you from Washington, D.C. to London Heathrow Airport in 7h 25m. Fly via Virgin Atlantic, United Airlines, or Icelandair 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 $411. Additional round-trip tickets that might be worth considering are offered by Icelandair and Scandinavian Airlines, with the lowest prices starting at $436 and $492, respectively. TAP AIR PORTUGAL is currently priced 48% 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 $202 on Icelandair. Other airlines that offer cheap prices include TAP AIR PORTUGAL from $222 and SWISS from $280 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: United Airlines (86%), Aer Lingus (83%), Finnair (83%).

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

    Looking at all options, your cheapest flight can be booked for $368. While the most popular route (Washington, D.C. Dulles Intl - London Heathrow) can be booked for $614 on average, our data indicates $2,359 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, January is the cheapest month in which you can book a flight from Washington, D.C. to London Heathrow Airport (average of $281). Flying from Washington, D.C. to London Heathrow Airport in December is currently the most expensive (average of $1,299). 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.

See more FAQs

Traveling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Ilford
Hounslow
Dorking
Winchester
Croydon
Gatwick
Southend-on-Sea
Harrow
Eastleigh
Dartford
Dover
Orpington
Watford
Northampton
Chipping Norton
Hayes
Kingston upon Thames
Eastbourne
Slough
Stansted

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Washington, D.C. to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Heathrow flights
Reagan-National to Heathrow flights
Dulles Intl to Gatwick flights
Dulles Intl to Stansted flights
Dulles Intl to Luton flights

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

Discover the top 10 airlines that operate flights from Washington, D.C. to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$411Average$561FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$436Average$649FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$462Average$898FlexibilityNo cancel feeOn-time69%
Virgin AtlanticCheapest$471Average$824FlexibilityNo cancel feeOn-time72%
Scandinavian AirlinesCheapest$492Average$754FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$497Average$806FlexibilityNo cancel feeOn-time71%
DeltaCheapest$519Average$918FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$529Average$800FlexibilityNo cancel feeOn-time70%
Aer LingusCheapest$554Average$789FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$560Average$800FlexibilityNo cancel feeOn-time77%

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Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.