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$234+ Cheap flights from Washington to the United Kingdom

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 10/3. 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 United Kingdom

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

Round-trip from

$465
(Mytrip)

One-way from

$234
(Mytrip)

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 United Kingdom
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One-way flight from Washington to United Kingdom
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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 United Kingdom.
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Price to beat on a one-way flight from Washington to United Kingdom.
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Find flight deals from Washington to United Kingdom

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

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 11/122:35 pmSEA - EDI
2 stops23h 40mMultiple Airlines
Mon 11/177:55 amEDI - SEA
2 stops17h 05mMultiple Airlines
Deal found 9/14$465
This Mytrip deal was found by Cheapflights users on 9/12. 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.
Mon 10/273:35 pmSEA - GLA
2 stops19h 50mMultiple Airlines
Mon 11/38:20 amGLA - SEA
2 stops16h 40mMultiple Airlines
Deal found 9/12$481
This Mytrip deal was found by Cheapflights users on 9/12. 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.
Sun 10/123:45 pmSEA - EDI
2 stops23h 25mMultiple Airlines
Sun 10/197:50 amEDI - SEA
2 stops20h 50mMultiple Airlines
Deal found 9/12$495
This CrystalTravel 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/73:45 pmSEA - GLA
1 stop13h 40mIcelandair
Tue 10/212:20 pmGLA - SEA
1 stop11h 30mIcelandair
Deal found 9/14$496
This Mytrip deal was found by Cheapflights users on 9/12. 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.
Sat 10/113:45 pmSEA - GLA
2 stops16h 25mMultiple Airlines
Sat 10/1811:50 pmGLA - SEA
2 stops28h 50mMultiple Airlines
Deal found 9/12$499
This Mytrip deal was found by Cheapflights users on 9/11. 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.
Sat 10/113:45 pmSEA - EDI
2 stops16h 55mMultiple Airlines
Sat 10/1811:35 pmEDI - SEA
2 stops29h 05mMultiple Airlines
Deal found 9/11$507
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 10/13:45 pmSEA - STN
2 stops22h 45mMultiple Airlines
Wed 10/88:15 amSTN - SEA
2 stops20h 25mMultiple Airlines
Deal found 9/14$508
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 9/14. 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.
Tue 9/305:35 pmSEA - LHR
Nonstop9h 45mDelta
Wed 11/56:20 amLHR - SEA
1 stop15h 00mDelta
Deal found 9/14$509
This Delta deal was found by Cheapflights users on 9/12. 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 9/12$510
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/27:00 pmSEA - GLA
1 stop10h 25mIcelandair
Sat 10/252:20 pmGLA - SEA
1 stop14h 20mIcelandair
Deal found 9/13$511
This Gurufare deal was found by Cheapflights users on 9/12. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/273:35 pmSEA - LGW
1 stop12h 20mIcelandair
Wed 11/511:55 amLGW - SEA
1 stop13h 05mIcelandair
Deal found 9/12$511

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington to United Kingdom 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 the United Kingdom that are best for you.

Fly from

Washington

Fly to

United Kingdom

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 10/14

7:37 pm-10:25 am

1 stop30h 48m

London Heathrow

Tue 10/21

2:10 pm-2:16 pm

1 stop32h 06m

$510

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

Wed 11/26

4:48 pm-10:30 am

Nonstop9h 42m

London Heathrow

Tue 12/2

10:00 am-11:50 am

1 stop33h 50m

$511

SeattleGlasgow

SEA - GLA

SEAGLA

Seattle/Tacoma Intl

Tue 10/7

7:00 pm-1:25 pm

1 stop10h 25m

Glasgow Intl

Wed 10/22

2:20 pm-5:50 pm

1 stop11h 30m

$513

SeattleGlasgow

SEA - GLA

SEAGLA

Seattle/Tacoma Intl

Sat 10/11

7:00 pm-1:25 pm

1 stop10h 25m

Glasgow Intl

Sat 10/18

2:20 pm-5:50 pm

1 stop11h 30m

$513

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Fri 11/7

2:35 pm-10:55 am

1 stop12h 20m

London Gatwick

Sat 11/15

11:55 am-5:00 pm

1 stop13h 05m

$518

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/12

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

Have a flexible travel schedule? Discover the best time to fly to United Kingdom 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 the United Kingdom

What is the cheapest month to book a flight from State of Washington to United Kingdom?

Currently, November is the cheapest month in which you can book a flight from State of Washington to United Kingdom (average of $661). Flying from State of Washington to United Kingdom 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 GB?

Find hourly flight availability from Washington to United Kingdom. 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 United Kingdom, 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 United Kingdom

Explore weekly flight availability from Washington to United Kingdom. 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 GB0 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 United Kingdom. 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 United Kingdom?

    For as low as $509, Delta can have you in United Kingdom from State of Washington in 9h 45m. Airlines will cover a distance of 4783 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from State of Washington to United Kingdom one-way?

    To fly one-way, consider booking your trip with WestJet, which is currently one of the cheapest options available, starting at $278. JetBlue flights start at $349 while deals on SWISS start at $394 one-way.

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

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

  • How can I find direct flights from Washington to United Kingdom?

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

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

    Yes. Cheapflights offers flight deals from Washington to United Kingdom 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 United Kingdom?

    Currently, November is the cheapest month in which you can book a flight from State of Washington to United Kingdom (average of $661). Flying from State of Washington to United Kingdom 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

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Alternative routes for Washington to United Kingdom

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Washington to United Kingdom

Discover the top 10 airlines that operate flights from Washington to United Kingdom. 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
JetBlueCheapest$213Average$1,046FlexibilityNo cancel feeOn-time62%
LufthansaCheapest$378Average$871FlexibilityNo cancel feeOn-time76%
IcelandairCheapest$484Average$876FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$523Average$846FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$532Average$741FlexibilityNo cancel feeOn-time77%
Air FranceCheapest$532Average$874FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$547Average$960FlexibilityNo cancel feeOn-time69%
FinnairCheapest$556Average$706FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$556Average$971FlexibilityNo cancel feeOn-time70%
DeltaCheapest$563Average$956FlexibilityNo cancel feeOn-timeN/A

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