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$251+ 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 2/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LHR
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheap 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 December 15, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 12/14. 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 12/319:50 amPDX - LHR
1 stop18h 00mLufthansa
Fri 1/236:35 amLHR - PDX
2 stops19h 55mLufthansa
Deal found 12/14$668
This Cheapflightsfares deal was found by Cheapflights users on 12/14. 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 12/319:50 amPDX - LHR
1 stop18h 00mLufthansa
Wed 1/286:35 amLHR - PDX
2 stops19h 35mLufthansa
Deal found 12/14$677
This CrystalTravel deal was found by Cheapflights users on 12/14. 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.
Wed 12/242:35 pmSEA - LHR
1 stop12h 15mIcelandair
Sat 1/1712:15 pmLHR - SEA
1 stop12h 45mIcelandair
Deal found 12/14$677
This CrystalTravel deal was found by Cheapflights users on 12/14. 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.
Wed 12/317:10 amPDX - LHR
1 stop14h 45mBrussels Airlines
Wed 1/2810:25 amLHR - PDX
1 stop16h 31mBrussels Airlines
Deal found 12/14$703
This Cheapflightsfares deal was found by Cheapflights users on 12/13. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3110:05 amSEA - LHR
2 stops16h 05mLufthansa
Mon 1/127:30 pmLHR - SEA
2 stops30h 44mLufthansa
Deal found 12/13$706
This Gotogate deal was found by Cheapflights users on 12/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/292:35 pmSEA - LHR
1 stop20h 55mIcelandair
Sun 1/188:35 pmLHR - SEA
1 stop28h 25mIcelandair
Deal found 12/14$710
This KLM deal was found by Cheapflights users on 12/14. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/311:45 pmPDX - LHR
1 stop12h 15mKLM
Wed 1/216:30 amLHR - PDX
1 stop12h 55mKLM
Deal found 12/14$711
This Cheapflightsfares deal was found by Cheapflights users on 12/14. 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 12/3111:53 amPDX - LHR
1 stop14h 07mBritish Airways
Wed 1/211:45 pmLHR - PDX
Nonstop10h 10mBritish Airways
Deal found 12/14$722
This Cheapflightsfares deal was found by Cheapflights users on 12/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3012:54 pmPDX - LHR
1 stop12h 46mLufthansa
Sun 2/811:10 amLHR - PDX
2 stops21h 29mLufthansa
Deal found 12/15$727
This Gotogate deal was found by Cheapflights users on 12/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/298:00 pmSEA - LHR
1 stop31h 50mMultiple Airlines
Sun 1/187:40 amLHR - SEA
2 stops19h 36mMultiple Airlines
Deal found 12/14$733
This United Airlines deal was found by Cheapflights users on 12/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/303:50 pmSEA - LHR
1 stop33h 50mUnited Airlines
Wed 1/72:30 pmLHR - SEA
1 stop26h 45mUnited Airlines
Deal found 12/14$747
This Air Canada deal was found by Cheapflights users on 12/13. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/308:00 pmSEA - LHR
1 stop31h 50mAir Canada
Wed 1/73:00 pmLHR - SEA
2 stops15h 06mAir Canada
Deal found 12/13$754

Find 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 December 15, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$474
(CrystalTravel)

One-way from

$251
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$986

Good round-trip deal

$643 or less

Good one-way deal

$379 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 ($139 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($23 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 to United Kingdom.
Search Deals
Price to beat on a one-way flight from Washington to United Kingdom.
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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 December 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

SeattleGlasgow

SEA - GLA

SEAGLA

Seattle/Tacoma Intl

Thu 2/19

2:35 pm-9:55 am

1 stop11h 20m

Glasgow Intl

Sat 2/28

12:35 pm-5:00 pm

1 stop12h 25m

$474

SeattleGlasgow

SEA - GLA

SEAGLA

Seattle/Tacoma Intl

Thu 1/15

2:35 pm-9:55 am

1 stop11h 20m

Glasgow Intl

Thu 1/29

11:15 am-5:00 pm

1 stop13h 45m

$487

SeattleGlasgow

SEA - GLA

SEAGLA

Seattle/Tacoma Intl

Tue 2/10

2:35 pm-9:55 am

1 stop11h 20m

Glasgow Intl

Tue 2/24

12:35 pm-5:00 pm

1 stop12h 25m

$492

SeattleGlasgow

SEA - GLA

SEAGLA

Seattle/Tacoma Intl

Tue 1/27

2:35 pm-8:20 pm

2 stops21h 45m

Glasgow Intl

Tue 2/3

8:25 am-5:00 pm

2 stops16h 35m

$556

SeattleEdinburgh

SEA - EDI

SEAEDI

Seattle/Tacoma Intl

Thu 1/8

2:35 pm-10:30 pm

2 stops23h 55m

Edinburgh Turnhouse

Tue 1/13

8:40 am-5:00 pm

2 stops16h 20m

$567

SeattleGlasgow

SEA - GLA

SEAGLA

Seattle/Tacoma Intl

Fri 3/6

1:35 pm-10:45 am

1 stop13h 10m

Glasgow Intl

Fri 3/13

10:40 am-5:55 pm

1 stop14h 15m

$583

SeattleGlasgow

SEA - GLA

SEAGLA

Seattle/Tacoma Intl

Fri 2/20

1:35 pm-10:45 am

1 stop13h 10m

Glasgow Intl

Sat 2/28

6:35 am-11:30 am

1 stop12h 55m

$583

SeattleGlasgow

SEA - GLA

SEAGLA

Seattle/Tacoma Intl

Tue 1/27

6:50 pm-3:50 pm

1 stop13h 00m

Glasgow Intl

Tue 2/3

10:50 am-4:55 pm

1 stop14h 05m

$583

SeattleGlasgow

SEA - GLA

SEAGLA

Seattle/Tacoma Intl

Sat 2/7

1:35 pm-1:20 pm

1 stop15h 45m

Glasgow Intl

Sat 2/14

11:40 am-4:55 pm

1 stop13h 15m

$583

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Sun 2/1

3:10 pm-8:05 pm

3 stops20h 55m

London Stansted

Sat 2/7

9:10 pm-1:20 pm

2 stops24h 10m

$588

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/13

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, January is the cheapest month in which you can book a flight from State of Washington to United Kingdom (average of $449). Flying from State of Washington to United Kingdom in June is currently the most expensive (average of $649). 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 December 15, 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 14% 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 Monday afternoons 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.

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 December 15, 2025.

The most flights from USWA to GB0 are scheduled on a Saturday (16 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (12 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 $474, Icelandair can have you in United Kingdom from State of Washington in 11h 20m. Airlines will cover a distance of 4445 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 Icelandair, which is currently one of the cheapest options available, starting at $166. JetBlue flights start at $181 while deals on WestJet start at $222 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, January is the cheapest month in which you can book a flight from State of Washington to United Kingdom (average of $449). Flying from State of Washington to United Kingdom in June is currently the most expensive (average of $649). 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

Browse thousands of different options on Cheapflights for your next trip

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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 December 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$213Average$1,004FlexibilityNo cancel feeOn-time62%
Scandinavian AirlinesCheapest$465Average$718FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$481Average$807FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$500Average$883FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$517Average$886FlexibilityNo cancel feeOn-time71%
Air FranceCheapest$532Average$844FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$543Average$942FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$547Average$944FlexibilityNo cancel feeOn-time69%
Virgin AtlanticCheapest$552Average$840FlexibilityNo cancel feeOn-time72%
Alaska AirlinesCheapest$553Average$989FlexibilityNo cancel feeOn-time75%

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