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$290+ 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 12/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LHR
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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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 October 30, 2025.

This oojo deal was found by Cheapflights users on 10/29. 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 12/12:35 pmSEA - EDI
1 stop11h 45mIcelandair
Fri 12/511:30 amEDI - SEA
1 stop13h 30mIcelandair
Deal found 10/29$491
This FlightHub deal was found by Cheapflights users on 10/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:35 pmSEA - EDI
1 stop11h 45mIcelandair
Fri 1/1612:20 pmEDI - SEA
1 stop12h 40mIcelandair
Deal found 10/29$493
This Mytrip deal was found by Cheapflights users on 10/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/22:35 pmSEA - EDI
2 stops19h 50mMultiple Airlines
Tue 12/98:20 amEDI - SEA
2 stops16h 40mMultiple Airlines
Deal found 10/30$504
This Mytrip deal was found by Cheapflights users on 10/29. 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 11/272:35 pmSEA - EDI
2 stops23h 55mMultiple Airlines
Thu 12/47:45 amEDI - SEA
2 stops17h 15mMultiple Airlines
Deal found 10/29$508
This KAYAK deal was found by Cheapflights users on 10/29. 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.
Wed 12/312:35 pmSEA - EDI
1 stop11h 45mIcelandair
Tue 1/1312:20 pmEDI - SEA
1 stop12h 40mIcelandair
Deal found 10/29$516
This oojo deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/42:35 pmSEA - LHR
1 stop20h 55mIcelandair
Tue 11/118:35 pmLHR - SEA
1 stop28h 25mIcelandair
Deal found 10/28$519
This Mytrip deal was found by Cheapflights users on 10/29. 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 - LGW
2 stops20h 20mMultiple Airlines
Wed 11/198:50 amLGW - SEA
2 stops16h 10mMultiple Airlines
Deal found 10/29$520
This Icelandair deal was found by Cheapflights users on 10/29. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/242:35 pmSEA - LHR
1 stop12h 15mIcelandair
Thu 12/412:15 pmLHR - SEA
1 stop12h 45mIcelandair
Deal found 10/29$520
This Icelandair deal was found by Cheapflights users on 10/29. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/242:35 pmSEA - LHR
1 stop12h 15mIcelandair
Sat 12/68:35 pmLHR - SEA
1 stop28h 25mIcelandair
Deal found 10/29$522
This Mytrip deal was found by Cheapflights users on 10/29. 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 - LTN
2 stops18h 30mMultiple Airlines
Wed 11/196:50 amLTN - SEA
2 stops18h 10mMultiple Airlines
Deal found 10/29$523
This Gurufare deal was found by Cheapflights users on 10/29. 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.
Wed 12/312:35 pmSEA - EDI
1 stop11h 45mIcelandair
Sun 1/1811:20 amEDI - SEA
1 stop13h 40mIcelandair
Deal found 10/29$524
This Mytrip deal was found by Cheapflights users on 10/29. 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 11/132:35 pmSEA - STN
2 stops24h 45mMultiple Airlines
Tue 11/186:30 amSTN - SEA
2 stops18h 30mMultiple Airlines
Deal found 10/29$529

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 October 30, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$490
(oojo)

One-way from

$290
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$663

Good round-trip deal

$688 or less

Good one-way deal

$460 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-London (LON) flights.
Search Deals
From Washington to United Kingdom
Search Deals
One-way flight from Washington to United Kingdom
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($134 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 October 2025
Search Deals
Price to beat on a round-trip flight from Washington to United Kingdom.
Search Deals
Price to beat on a one-way flight from Washington to United Kingdom.
Search Deals

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 October 30, 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

Thu 11/27

2:35 pm-10:50 am

1 stop12h 15m

London Heathrow

Thu 12/4

12:15 pm-5:00 pm

1 stop12h 45m

$520

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 11/26

2:35 pm-10:50 am

1 stop12h 15m

London Heathrow

Thu 12/4

12:15 pm-5:00 pm

1 stop12h 45m

$520

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Thu 11/13

2:35 pm-11:20 pm

2 stops24h 45m

London Stansted

Thu 11/27

6:30 am-5:00 pm

2 stops18h 30m

$540

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 11/24

2:35 pm-10:55 am

1 stop12h 20m

London Gatwick

Mon 12/8

11:55 am-5:00 pm

1 stop13h 05m

$540

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Thu 11/27

2:35 pm-10:55 am

1 stop12h 20m

London Gatwick

Mon 12/8

11:55 am-5:00 pm

1 stop13h 05m

$540

PortlandLondon

PDX - LGW

PDXLGW

Portland

Tue 11/4

2:45 pm-10:55 am

1 stop12h 10m

London Gatwick

Mon 11/17

11:55 am-5:00 pm

1 stop13h 05m

$540

PortlandLondon

PDX - LGW

PDXLGW

Portland

Tue 11/4

2:45 pm-10:55 am

1 stop12h 10m

London Gatwick

Mon 11/10

11:55 am-5:00 pm

1 stop13h 05m

$540

PortlandLondon

PDX - LGW

PDXLGW

Portland

Tue 11/4

2:45 pm-10:55 am

1 stop12h 10m

London Gatwick

Fri 11/14

11:55 am-5:00 pm

1 stop13h 05m

$540

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Sun 1/11

8:35 am-4:15 pm

2 stops23h 40m

London Stansted

Tue 1/20

8:25 pm-11:42 pm

2 stops35h 17m

$545

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Wed 11/5

3:10 pm-10:50 pm

2 stops23h 40m

London Stansted

Tue 11/18

9:45 pm-7:16 pm

3 stops29h 31m

$552

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

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 $459). Flying from State of Washington to United Kingdom in June is currently the most expensive (average of $653). 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 October 30, 2025.

When flying from State of Washington to United Kingdom, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 13% versus a flight at noon.

What is the cheapest day to fly from State of Washington to United Kingdom?

Use this chart to determine the cheapest time to fly round-trip from Washington to United Kingdom. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their State of Washington to United Kingdom flight should consider departing on Saturday at noon when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 $581, Icelandair can have you in United Kingdom from State of Washington in 9h 30m. 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 American Airlines, which is currently one of the cheapest options available, starting at $302. Icelandair flights start at $339 while deals on Scandinavian Airlines start at $344 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 $459). Flying from State of Washington to United Kingdom in June is currently the most expensive (average of $653). 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$213Average$1,004FlexibilityNo cancel feeOn-time62%
Scandinavian AirlinesCheapest$465Average$741FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$484Average$870FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$500Average$899FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$517Average$847FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$518Average$845FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$546Average$966FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$547Average$953FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$553Average$999FlexibilityNo cancel feeOn-time75%
FinnairCheapest$556Average$694FlexibilityNo cancel feeOn-time76%

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