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$264+ Cheap flights from Washington 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 3/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LHR
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from Washington to Heathrow

Keep the following information in mind while searching for Washington to Heathrow flight deals. Data was last updated September 15, 2025.

Round-trip from

$508
(United Airlines)

One-way from

$264
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$697

Good round-trip deal

$654 or less

Good one-way deal

$417 or less
From Washington to London Heathrow
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One-way flight from Washington to London Heathrow
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Highest demand for flights based on searches. 15% potential increase in price ($138 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Washington to London Heathrow.
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Price to beat on a one-way flight from Washington to London Heathrow.
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Find flight deals from Washington to Heathrow

Cheapest flights from Washington to Heathrow
Explore the most affordable flight options available from Washington to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This Booking.com deal was found by Cheapflights users on 9/13. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/225:35 pmSEA - LHR
Nonstop9h 45mVirgin Atlantic
Tue 10/77:45 pmLHR - SEA
1 stop23h 30mVirgin Atlantic
Deal found 9/13$508
This Delta deal was found by Cheapflights users on 9/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/308:25 pmSEA - LHR
Nonstop9h 50mDelta
Thu 10/99:00 amLHR - SEA
1 stop16h 40mDelta
Deal found 9/15$509
This Delta deal was found by Cheapflights users on 9/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/124:48 pmSEA - LHR
Nonstop9h 42mDelta
Tue 11/186:20 amLHR - SEA
1 stop13h 05mDelta
Deal found 9/13$510
This Delta deal was found by Cheapflights users on 9/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/148:25 pmSEA - LHR
Nonstop9h 50mDelta
Thu 10/236:30 amLHR - SEA
1 stop17h 35mDelta
Deal found 9/15$511
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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 10/11:30 pmSEA - LHR
Nonstop9h 20mBritish Airways
Tue 10/149:25 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 9/14$512
This Mytrip deal was found by Cheapflights users on 9/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/87:15 amSEA - LHR
1 stop15h 15mAir Canada
Tue 10/146:50 amLHR - SEA
2 stops22h 55mAir Canada
Deal found 9/14$513
This Delta deal was found by Cheapflights users on 9/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/15:45 pmSEA - LHR
1 stop13h 55mDelta
Fri 10/316:20 amLHR - SEA
1 stop15h 00mDelta
Deal found 9/14$514
This Delta deal was found by Cheapflights users on 9/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/57:50 amSEA - LHR
1 stop16h 15mDelta
Tue 10/1411:45 amLHR - SEA
1 stop32h 05mDelta
Deal found 9/14$515
This United deal was found by Cheapflights users on 9/13. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/48:30 amSEA - LHR
2 stops38h 45mMultiple Airlines
Tue 10/212:10 pmLHR - SEA
1 stop32h 06mMultiple Airlines
Deal found 9/13$516
This Delta deal was found by Cheapflights users on 9/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/18:25 pmSEA - LHR
Nonstop9h 50mDelta
Tue 10/145:25 pmLHR - SEA
Nonstop10h 25mDelta
Deal found 9/14$517
This United Airlines deal was found by Cheapflights users on 9/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/274:35 pmSEA - LHR
1 stop31h 05mUnited Airlines
Fri 10/109:00 amLHR - SEA
1 stop15h 59mUnited Airlines
Deal found 9/15$518
This KAYAK deal was found by Cheapflights users on 9/13. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/303:45 pmSEA - LHR
1 stop12h 10mIcelandair
Wed 10/298:35 pmLHR - SEA
1 stop28h 25mIcelandair
Deal found 9/13$519

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington 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 September 15, 2025.
Use the filters below to find and compare flights from Washington to London Heathrow Airport that are best for you.

Fly from

Washington

Fly to

Heathrow

Route

Depart

Return

Price

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 10/29

5:45 pm-10:30 am

Nonstop9h 45m

London Heathrow

Wed 11/5

6:20 am-1:20 pm

1 stop15h 00m

$509

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 3/11

6:31 am-7:55 am

1 stop18h 24m

London Heathrow

Tue 3/17

1:25 pm-10:29 pm

2 stops40h 04m

$509

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 10/27

5:45 pm-10:30 am

Nonstop9h 45m

London Heathrow

Fri 11/7

6:20 am-1:20 pm

1 stop15h 00m

$509

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 10/28

8:20 pm-12:50 pm

Nonstop9h 30m

London Heathrow

Tue 11/11

6:20 am-11:25 am

1 stop13h 05m

$510

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 10/27

8:20 pm-12:50 pm

Nonstop9h 30m

London Heathrow

Tue 11/11

6:20 am-11:25 am

1 stop13h 05m

$510

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 11/2

4:48 pm-10:30 am

Nonstop9h 42m

London Heathrow

Tue 11/11

6:20 am-11:25 am

1 stop13h 05m

$510

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 10/8

2:10 pm-2:35 pm

1 stop16h 25m

London Heathrow

Wed 10/15

6:15 am-11:15 am

1 stop13h 00m

$514

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 10/7

9:59 pm-8:00 pm

1 stop14h 01m

London Heathrow

Wed 10/15

6:15 am-11:15 am

1 stop13h 00m

$514

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 10/1

11:25 am-9:15 am

1 stop13h 50m

London Heathrow

Wed 11/5

6:20 am-1:20 pm

1 stop15h 00m

$514

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 10/22

6:15 am-1:20 pm

1 stop23h 05m

London Heathrow

Fri 10/31

6:50 am-8:29 pm

2 stops20h 39m

$546

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 60 results
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Best time to book a flight from Washington to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Washington 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 to London Heathrow Airport

What is the cheapest month to book a flight from State of Washington to London Heathrow Airport?

Currently, November is the cheapest month in which you can book a flight from State of Washington to London Heathrow Airport (average of $661). Flying from State of Washington to London Heathrow Airport in June is currently the most expensive (average of $1,097). 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 WA to LHR?

Find hourly flight availability from Washington 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 15, 2025.

When flying from State of Washington 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 State of Washington to London Heathrow Airport

Explore weekly flight availability from Washington 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 September 15, 2025.

The most flights from USWA to LHR are scheduled on a Monday (21 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (21 on average).

Related info for your journey

Find useful and relevant information for your journey from Washington 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 State of Washington to London Heathrow Airport?

    There are many flights that can get you from State of Washington to London Heathrow Airport in 9h 45m. Fly via Delta, United Airlines, or KLM to get the fastest option. There are 4783 mi between State of Washington and London Heathrow Airport. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from State of Washington to London Heathrow Airport one-way?

    $323 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on JetBlue and Scandinavian Airlines, with prices starting from $349 and $359, respectively.

  • What are the most popular routes from State of Washington to London Heathrow Airport?

    While some choose either Portland - London Heathrow or Spokane - London Heathrow, Seattle/Tacoma Intl - London Heathrow is the most popular route from State of Washington to London Heathrow Airport.

  • What are the most reliable airlines from State of Washington to London Heathrow Airport?

    No one likes to see their flight delayed. When booking a flight from State of Washington to London Heathrow Airport consider choosing Aeromexico (88%), KLM (87%) or Air France (87%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from State of Washington to London Heathrow Airport?

    On average you can expect to pay $2,215 for a flight from State of Washington to London Heathrow Airport. The cheapest flight overall is $326 while the most popular route, (Seattle/Tacoma Intl - London Heathrow) is currently priced at $471.

  • Can I find deals for flights from Washington to Heathrow that include hotel bookings?

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

  • How can I find direct flights from Washington to Heathrow?

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

  • Can I find deals for business class flights from Washington to Heathrow?

    Yes. Cheapflights offers flight deals from Washington 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 State of Washington to London Heathrow Airport?

    Currently, November is the cheapest month in which you can book a flight from State of Washington to London Heathrow Airport (average of $661). Flying from State of Washington to London Heathrow Airport in June is currently the most expensive (average of $1,097). 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
Hounslow
Hayes
Southend-on-Sea
Harrow
Canterbury
Croydon
Eastleigh
Dartford
Dover
Winchester
Orpington
Northampton
Gatwick
Borehamwood
Broadway
Aylesbury
Bedford
Wembley
Folkestone
Chichester

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Alternative routes for Washington to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
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Miami to Heathrow flights
John F Kennedy Intl to Luton flights
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John F Kennedy Intl to Stansted flights
Hobby to Heathrow flights
Boston to Gatwick flights
Boston to London City flights
Philadelphia to Heathrow flights
Reagan-National to Heathrow flights
Los Angeles to London City flights
Dulles Intl to Gatwick flights
Newark to Stansted flights
George Bush Intcntl to Heathrow flights
Orlando to Heathrow flights
Dulles Intl to London City flights
Baltimore to Gatwick flights
Newark to Luton flights
Los Angeles to Gatwick flights
O'Hare Intl to Gatwick flights
Minneapolis to Heathrow flights
San Francisco to Gatwick flights
Raleigh to Heathrow flights
Reagan-National to Gatwick flights
Tampa to Heathrow flights
Charlotte to Heathrow flights
Dallas/Fort Worth to Gatwick flights
O'Hare Intl to London City flights
San Francisco to London City flights
Sky Harbor Intl to Heathrow flights
Seattle to Gatwick flights
Detroit to Heathrow flights
San Diego to Heathrow flights
LaGuardia to London City flights

Top 10 airlines flying from Washington to Heathrow

Discover the top 10 airlines that operate flights from Washington 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$378Average$865FlexibilityNo cancel feeOn-time76%
IcelandairCheapest$484Average$641FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$523Average$733FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$532Average$741FlexibilityNo cancel feeOn-time77%
Air FranceCheapest$532Average$804FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$547Average$851FlexibilityNo cancel feeOn-time69%
FinnairCheapest$556Average$706FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$556Average$804FlexibilityNo cancel feeOn-time70%
DeltaCheapest$563Average$914FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$569Average$944FlexibilityNo cancel feeOn-time71%

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