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$249+ 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 2/10. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — LHR
Jan 26 — Feb 21
Mon 1/26
Mon 2/2
1 adult, Economy
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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 December 27, 2025.

This JetBlue deal was found by Cheapflights users on 12/26. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/294:45 pmDCA - LHR
1 stop9h 10mJetBlue
Fri 1/912:20 pmLHR - DCA
1 stop15h 39mJetBlue
Deal found 12/26$640
This CheapOair deal was found by Cheapflights users on 12/26. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/294:45 pmDCA - LHR
1 stop9h 10mJetBlue
Sun 1/117:45 amLHR - DCA
1 stop20h 14mJetBlue
Deal found 12/26$656
This Kiwi.com deal was found by Cheapflights users on 12/24. 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 12/297:40 pmIAD - LHR
1 stop18h 50mIcelandair
Mon 1/128:35 pmLHR - IAD
1 stop26h 55mIcelandair
Deal found 12/24$662
This Cheapflightsfares deal was found by Cheapflights users on 12/27. 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.
Tue 12/3010:15 pmIAD - LHR
Nonstop7h 35mMultiple Airlines
Tue 1/139:00 amLHR - IAD
1 stop12h 40mMultiple Airlines
Deal found 12/27$687
This Cheapflightsfares deal was found by Cheapflights users on 12/25. 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.
Wed 12/3110:15 pmIAD - LHR
Nonstop7h 35mLufthansa
Wed 1/147:40 amLHR - IAD
1 stop12h 55mLufthansa
Deal found 12/25$691
This Cheapflightsfares deal was found by Cheapflights users on 12/26. 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.
Tue 12/308:30 pmIAD - LHR
1 stop11h 30mSWISS
Tue 1/139:00 amLHR - IAD
1 stop12h 40mSWISS
Deal found 12/26$698
This Kiwi.com deal was found by Cheapflights users on 12/24. 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.
Tue 12/307:40 pmBWI - LHR
1 stop10h 10mIcelandair
Sun 1/118:35 pmLHR - BWI
1 stop27h 05mIcelandair
Deal found 12/24$707
This Netflights deal was found by Cheapflights users on 12/26. 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 Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2910:55 pmIAD - LHR
Nonstop7h 30mVirgin Atlantic
Wed 1/149:00 amLHR - IAD
1 stop12h 35mVirgin Atlantic
Deal found 12/26$709
This Expedia deal was found by Cheapflights users on 12/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/297:40 pmIAD - LHR
1 stop10h 10mIcelandair
Wed 1/1412:15 pmLHR - IAD
1 stop11h 15mIcelandair
Deal found 12/26$711
This CrystalTravel deal was found by Cheapflights users on 12/24. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:20 pmIAD - LHR
Nonstop7h 20mAustrian Airlines
Fri 1/94:20 pmLHR - IAD
Nonstop8h 55mAustrian Airlines
Deal found 12/24$712
This Cheapflightsfares deal was found by Cheapflights users on 12/26. 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.
Tue 12/306:20 pmIAD - LHR
Nonstop7h 20mMultiple Airlines
Fri 1/94:20 pmLHR - IAD
Nonstop8h 55mMultiple Airlines
Deal found 12/26$713
This Kiwi.com deal was found by Cheapflights users on 12/24. 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.
Wed 12/315:31 pmIAD - LHR
1 stop12h 44mAustrian Airlines
Fri 1/94:20 pmLHR - IAD
Nonstop8h 55mAustrian Airlines
Deal found 12/24$716

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 December 27, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$569
(Kiwi.com)

One-way from

$249
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$1,003

Good round-trip deal

$642 or less

Good one-way deal

$435 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. 4% potential increase in price ($36 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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.
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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 December 27, 2025.
Use the filters below to find and compare flights from Washington, D.C. to London Heathrow Airport that are best for you.

Fly from

Washington, D.C.

Fly to

Heathrow

Route

Depart

Return

Price

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Mon 2/9

6:20 pm-6:40 am

Nonstop7h 20m

London Heathrow

Tue 2/17

6:50 am-2:35 pm

1 stop12h 45m

$614

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 2/11

6:20 pm-6:40 am

Nonstop7h 20m

London Heathrow

Wed 2/18

6:50 am-2:35 pm

1 stop12h 45m

$614

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 2/10

10:15 pm-10:50 am

Nonstop7h 35m

London Heathrow

Fri 2/20

6:50 am-2:35 pm

1 stop12h 45m

$614

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 2/8

10:15 pm-10:50 am

Nonstop7h 35m

London Heathrow

Thu 2/19

6:50 am-2:35 pm

1 stop12h 45m

$614

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Thu 2/12

6:20 pm-6:40 am

Nonstop7h 20m

London Heathrow

Fri 2/20

6:50 am-2:35 pm

1 stop12h 45m

$614

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 2/15

10:15 pm-10:50 am

Nonstop7h 35m

London Heathrow

Tue 2/24

6:50 am-2:35 pm

1 stop12h 45m

$615

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Fri 2/13

6:20 pm-6:40 am

Nonstop7h 20m

London Heathrow

Tue 2/17

6:50 am-2:35 pm

1 stop12h 45m

$615

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 3/10

7:20 pm-6:40 am

Nonstop7h 20m

London Heathrow

Tue 3/17

6:50 am-3:35 pm

1 stop12h 45m

$615

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 2/24

10:15 pm-10:50 am

Nonstop7h 35m

London Heathrow

Sun 3/1

6:50 am-2:35 pm

1 stop12h 45m

$615

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Thu 3/5

6:20 pm-6:40 am

Nonstop7h 20m

London Heathrow

Mon 3/9

6:50 am-3:35 pm

1 stop12h 45m

$615

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/26

Showing 1-10 of 60 results
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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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Washington, D.C.-London Heathrow Airport flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 December 19, 2025.

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, March is the cheapest month in which you can book a flight from Washington, D.C. to London Heathrow Airport (average of $31). Flying from Washington, D.C. to London Heathrow Airport in June is currently the most expensive (average of $728). 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 December 27, 2025.

It’s typically best to fly out from Washington, D.C. to London Heathrow Airport in the morning. Doing so could potentially save you 26% 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 December 27, 2025.

The most flights from WAS to LHR are scheduled on a Wednesday (30 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (17 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.

Reykjavik (KEF) – 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.

Dublin (DUB) is the most affordable 1-stop option, with an average round-trip price of $479.

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 Montreal (YUL) have the shortest average one-way travel time for 1-stop routes: 9h 20m.

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 Montreal (YUL) offer the fastest connection on this route, with an average layover time of 1h 24m.

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

About 21% of weekly flights between Washington, D.C. and London have experienced delays in the past year, with the average delay time being 159 minutes.

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

Historically, flights departing in the early afternoon 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 Saturday 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
Airports
IAD

For evening departures, expect crowded check-in areas at IAD. Plan extra time for security and navigating the terminal layout.

Read more about IADBy Ramsey Qubein
LHR

Take the Heathrow Express for the fastest route to central London from LHR. It connects to Paddington Station for further travel options.

Read more about LHRBy Ramsey Qubein
Our travel experts
Ramsey Qubein

Ramsey Qubein

Expert on LHR and IAD

Ramsey Qubein

Ramsey Qubein

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 December 27, 2025.
Peruse reviews from past customers who have flown with United Airlines, American Airlines, and Icelandair 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
9,116 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
United Airlines
7.4
Good
9,116 reviews
United Airlines
7.4
Good
9,116 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
American Airlines
7.2
Good
11,068 reviews
United Airlines
7.4
Good
9,116 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
Icelandair
7.0
Good
592 reviews
United Airlines
7.4
Good
9,116 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
Iberia
7.0
Good
3,059 reviews
United Airlines
7.4
Good
9,116 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
British Airways
6.7
Okay
7,614 reviews
United Airlines
7.4
Good
9,116 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

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 to get the fastest option. The distance between Washington, D.C. and London Heathrow Airport is about 3664 mi. All flights are typically nonstop.

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

    Flying on JetBlue is currently your cheapest option to London Heathrow Airport, with prices starting at $31. Additional round-trip tickets that might be worth considering are offered by TAP AIR PORTUGAL and Icelandair, with the lowest prices starting at $395 and $421, respectively. JetBlue is currently priced 95% 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 $191 on Icelandair. Other airlines that offer cheap prices include Scandinavian Airlines from $213 and TAP AIR PORTUGAL from $222 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: KLM (95%), Air France (92%), Delta (92%).

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

    Looking at all options, your cheapest flight can be booked for $350. While the most popular route (Washington, D.C. Dulles Intl - London Heathrow) can be booked for $422 on average, our data indicates $2,116 when flying from Washington, D.C. to London Heathrow Airport.

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

    Washington, D.C. to London Heathrow Airport flights have a layover in Reykjavik most of the time.

  • What are some popular things to do or see while on a layover in Reykjavik?

    Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool are the most popular attractions in Reykjavik if you're in need of something to do during your layover. Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool can be accessed by traveling approximately 23.2 mi, 23.3 mi, and 24.6 mi, respectively from Reykjavik Keflavik Intl. Those looking to explore during their layover in Reykjavik can rent a car from Reykjavik Keflavik Intl for about $49 per day.

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

    Washington, D.C. to London Heathrow Airport flights that have layovers will least frequently stop in Dublin.

  • 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, March is the cheapest month in which you can book a flight from Washington, D.C. to London Heathrow Airport (average of $31). Flying from Washington, D.C. to London Heathrow Airport in June is currently the most expensive (average of $728). 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
Southend-on-Sea
Harrow
Eastleigh
Dartford
Dover
Winchester
Croydon
Hayes
Orpington
Northampton
Watford
Borehamwood
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Horley
Kingston upon Thames
Folkestone

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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 December 27, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$31Average$811FlexibilityNo cancel feeOn-time62%
TAP AIR PORTUGALCheapest$395Average$566FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$429Average$588FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$429Average$593FlexibilityNo cancel feeOn-time77%
PLAYCheapest$429Average$521FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$447Average$1,061FlexibilityNo cancel feeOn-time76%
Virgin AtlanticCheapest$497Average$842FlexibilityNo cancel feeOn-time72%
American AirlinesCheapest$497Average$846FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$506Average$834FlexibilityNo cancel feeOn-time69%
KLMCheapest$520Average$615FlexibilityNo cancel feeOn-time75%

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