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$346+ 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 4/14. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — LHR
May 4 — May 111
Mon 5/4
Mon 5/11
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Washington, D.C. to London Heathrow are usually found in August or September, booked 28 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 April 4, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/30. 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.
Sun 4/198:20 pm
IAD
-
LHR
1 stop14h 40m
Scandinavian Airlines
Thu 4/2310:20 am
LHR
-
IAD
1 stop11h 40m
Scandinavian Airlines
Deal found 3/30$644
This deal was found by Cheapflights users on 4/1. 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.
Thu 5/144:05 pm
IAD
-
LHR
1 stop12h 30m
Air Canada
Sat 5/309:30 am
LHR
-
IAD
1 stop14h 28m
Air Canada
Deal found 4/1$648
This deal was found by Cheapflights users on 4/1. 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.
Tue 5/193:45 pm
IAD
-
LHR
1 stop13h 15m
Air Canada
Wed 6/39:30 am
LHR
-
IAD
1 stop14h 28m
Air Canada
Deal found 4/1$649
This deal was found by Cheapflights users on 4/1. 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.
Mon 5/183:45 pm
IAD
-
LHR
1 stop13h 15m
Air Canada
Tue 6/29:30 am
LHR
-
IAD
1 stop14h 28m
Air Canada
Deal found 4/1$650
This Kiwi.com deal was found by Cheapflights users on 4/1. 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.
Sun 4/1910:35 pm
IAD
-
LHR
1 stop19h 20m
TAP AIR PORTUGAL
Tue 5/56:00 am
LHR
-
IAD
1 stop14h 10m
TAP AIR PORTUGAL
Deal found 4/1$651
This Kiwi.com deal was found by Cheapflights users on 4/1. 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.
Sun 4/2610:35 pm
IAD
-
LHR
1 stop19h 20m
TAP AIR PORTUGAL
Wed 5/66:00 am
LHR
-
IAD
1 stop14h 10m
TAP AIR PORTUGAL
Deal found 4/1$652
This Kiwi.com deal was found by Cheapflights users on 3/30. 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.
Sun 4/2610:35 pm
IAD
-
LHR
1 stop18h 25m
TAP AIR PORTUGAL
Tue 5/56:00 am
LHR
-
IAD
1 stop14h 10m
TAP AIR PORTUGAL
Deal found 3/30$653
This deal was found by Cheapflights users on 4/3. 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 4/188:20 pm
IAD
-
LHR
1 stop14h 40m
Scandinavian Airlines
Mon 4/206:40 am
LHR
-
IAD
1 stop15h 20m
Scandinavian Airlines
Deal found 4/3$654
This oojo deal was found by Cheapflights users on 3/31. 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 4/2710:35 pm
IAD
-
LHR
1 stop15h 15m
TAP AIR PORTUGAL
Thu 5/76:00 am
LHR
-
IAD
1 stop19h 35m
TAP AIR PORTUGAL
Deal found 3/31$655
This oojo deal was found by Cheapflights users on 3/30. 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 4/2710:35 pm
IAD
-
LHR
1 stop15h 15m
TAP AIR PORTUGAL
Thu 5/146:45 pm
LHR
-
IAD
1 stop25h 25m
TAP AIR PORTUGAL
Deal found 3/30$656
This Kiwi.com deal was found by Cheapflights users on 3/31. 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.
Mon 4/208:20 pm
IAD
-
LHR
1 stop14h 40m
Scandinavian Airlines
Fri 4/2410:20 am
LHR
-
IAD
1 stop11h 40m
Scandinavian Airlines
Deal found 3/31$657
This Kiwi.com deal was found by Cheapflights users on 4/3. 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.
Sun 4/268:20 pm
IAD
-
LHR
1 stop20h 20m
Scandinavian Airlines
Wed 4/2910:20 am
LHR
-
IAD
1 stop11h 40m
Scandinavian Airlines
Deal found 4/3$658

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 April 4, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$644
(Kiwi.com)

One-way from

$346
(Mytrip)

Popular in

June

Cheapest in

August

Average price

$740

Good round-trip deal

$833 or less

Good one-way deal

$491 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. 14% potential increase in price ($136 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 4, 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

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 5/5

9:50 pm-10:40 am

Nonstop7h 50m

London Heathrow

Thu 5/14

6:50 am-2:20 pm

1 stop12h 30m

$848

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 5/12

6:25 pm-6:55 am

Nonstop7h 30m

London Heathrow

Tue 5/19

6:50 am-1:30 pm

1 stop11h 40m

$850

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Wed 4/22

9:00 am-6:25 am

1 stop16h 25m

London Heathrow

Tue 5/19

6:30 am-5:07 pm

2 stops15h 37m

$864

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 4/19

6:00 am-8:40 pm

1 stop9h 40m

London Heathrow

Tue 4/28

12:15 pm-3:30 pm

Nonstop8h 15m

$874

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Tue 4/28

9:30 pm-9:50 am

Nonstop7h 20m

London Heathrow

Thu 5/7

4:25 pm-7:40 pm

Nonstop8h 15m

$877

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Sun 4/19

9:35 pm-9:55 am

Nonstop7h 20m

London Heathrow

Tue 4/28

4:25 pm-7:40 pm

Nonstop8h 15m

$879

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Sun 8/9

6:22 pm-9:15 am

1 stop9h 53m

London Heathrow

Fri 8/21

9:20 am-5:08 pm

1 stop12h 48m

$892

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Tue 9/1

2:10 pm-7:15 am

1 stop12h 05m

London Heathrow

Tue 9/8

11:45 am-12:16 am

2 stops17h 31m

$897

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Thu 8/20

6:30 pm-6:55 am

Nonstop7h 25m

London Heathrow

Tue 9/1

7:25 am-7:25 pm

1 stop17h 00m

$898

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 4/21

10:10 pm-10:40 am

Nonstop7h 30m

London Heathrow

Sun 4/26

6:50 am-1:30 pm

1 stop11h 40m

$899

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy1 starTrust Score*2 stars
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

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

Use this chart to determine the optimal time to book a round-trip flight from Washington, D.C. to Heathrow. Price data was last updated on April 2, 2026.

Booking 28 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.

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

Currently, August is the cheapest month in which you can book a flight from Washington, D.C. to London Heathrow Airport (average of $436). Flying from Washington, D.C. to London Heathrow Airport in June is currently the most expensive (average of $712). 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 April 4, 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 April 4, 2026.

The most flights from WAS to LHR are scheduled on a Thursday (28 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (22 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 61% 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 19% of weekly flights between Washington, D.C. and London have experienced delays in the past year, with the average delay time being 165 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.

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 April 4, 2026.
Peruse reviews from past customers who have flown with Virgin Atlantic,United Airlines, 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.
Virgin Atlantic
7.5
Good
685 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.5

Food

6.9

Overall

7.5

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
7.5
Good
685 reviews
Virgin Atlantic
7.5
Good
685 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.5

Food

6.9

Overall

7.5

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!
United Airlines
7.4
Good
9,543 reviews
Virgin Atlantic
7.5
Good
685 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.5

Food

6.9

Overall

7.5

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!
American Airlines
7.1
Good
11,558 reviews
Virgin Atlantic
7.5
Good
685 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.5

Food

6.9

Overall

7.5

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!
Iberia
7.0
Good
3,163 reviews
Virgin Atlantic
7.5
Good
685 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.5

Food

6.9

Overall

7.5

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!
British Airways
6.7
Okay
7,848 reviews
Virgin Atlantic
7.5
Good
685 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.5

Food

6.9

Overall

7.5

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!

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 20m. Fly via United Airlines, Delta, or British Airways to get the fastest option. The distance between Washington, D.C. and London Heathrow Airport is about 3622 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 Icelandair is currently your cheapest option to London Heathrow Airport, with prices starting at $398. Additional round-trip tickets that might be worth considering are offered by TAP AIR PORTUGAL and Scandinavian Airlines, with the lowest prices starting at $411 and $454, respectively. Icelandair 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 (89%), Delta (88%), Virgin Atlantic (88%).

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

    Looking at all options, your cheapest flight can be booked for $344. While the most popular route (Washington, D.C. Dulles Intl - London Heathrow) can be booked for $520 on average, our data indicates $2,305 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, August is the cheapest month in which you can book a flight from Washington, D.C. to London Heathrow Airport (average of $436). Flying from Washington, D.C. to London Heathrow Airport in June is currently the most expensive (average of $712). 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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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
Croydon
Gatwick
Southend-on-Sea
Harrow
Eastleigh
Dartford
Dover
Winchester
Orpington
Watford
Northampton
Borehamwood
Broadway
Chipping Norton
Hayes
Kingston upon Thames
Eastbourne
Sutton

Browse thousands of different options on Cheapflights for your next trip

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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
Dulles Intl to Gatwick flights
Reagan-National to Heathrow 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 April 4, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$398Average$608FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$411Average$550FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$454Average$629FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$462Average$883FlexibilityNo cancel feeOn-time69%
Virgin AtlanticCheapest$471Average$807FlexibilityNo cancel feeOn-time72%
American AirlinesCheapest$497Average$800FlexibilityNo cancel feeOn-time71%
IberiaCheapest$527Average$753FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$529Average$801FlexibilityNo cancel feeOn-time70%
DeltaCheapest$530Average$866FlexibilityNo cancel feeOn-timeN/A
Aer LingusCheapest$561Average$781FlexibilityNo cancel feeOn-timeN/A

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