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$220+ 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 10/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LHR
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
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 July 31, 2025.

Round-trip from

$491
(Mytrip)

One-way from

$220
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$935

Good round-trip deal

$589 or less

Good one-way deal

$426 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 ($136 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 31, 2025.

This Delta deal was found by Cheapflights users on 7/31. 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 9/23:05 pmSEA - LHR
1 stop15h 30mDelta
Tue 9/306:15 amLHR - SEA
1 stop13h 00mDelta
Deal found 7/31$512
This Gotogate deal was found by Cheapflights users on 7/30. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/183:45 pmSEA - LGW
1 stop12h 00mIcelandair
Sun 8/313:40 pmLGW - SEA
1 stop34h 10mIcelandair
Deal found 7/30$513
This Virgin Atlantic deal was found by Cheapflights users on 7/31. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/133:15 pmSEA - LHR
1 stop14h 15mVirgin Atlantic
Wed 8/206:15 amLHR - SEA
1 stop13h 00mVirgin Atlantic
Deal found 7/31$513
This British Airways deal was found by Cheapflights users on 7/29. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/101:30 pmSEA - LHR
Nonstop9h 20mBritish Airways
Wed 9/249:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 7/29$516
This Mytrip deal was found by Cheapflights users on 7/31. 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 10/303:35 pmSEA - STN
2 stops24h 45mMultiple Airlines
Fri 11/146:30 amSTN - SEA
2 stops18h 30mMultiple Airlines
Deal found 7/31$517
This SWISS deal was found by Cheapflights users on 7/29. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/114:25 pmSEA - LHR
1 stop16h 00mSWISS
Mon 8/188:05 pmLHR - SEA
2 stops30h 31mSWISS
Deal found 7/29$518
This Kiwi.com deal was found by Cheapflights users on 7/31. 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 9/87:35 pmSEA - LTN
1 stop12h 25mMultiple Airlines
Tue 9/1610:00 amLTN - SEA
1 stop15h 50mMultiple Airlines
Deal found 7/31$518
This Mytrip deal was found by Cheapflights users on 7/31. 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 8/263:45 pmSEA - LGW
2 stops21h 30mMultiple Airlines
Tue 9/29:40 amLGW - SEA
2 stops16h 10mMultiple Airlines
Deal found 7/31$521
This Air Canada deal was found by Cheapflights users on 7/31. 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.
Mon 9/87:15 amSEA - LHR
1 stop18h 20mAir Canada
Wed 10/18:30 amLHR - SEA
2 stops18h 06mAir Canada
Deal found 7/31$521
This Icelandair deal was found by Cheapflights users on 7/29. 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.
Fri 11/282:35 pmSEA - LHR
1 stop20h 55mIcelandair
Sun 12/712:15 pmLHR - SEA
1 stop12h 45mIcelandair
Deal found 7/29$522
This SWISS deal was found by Cheapflights users on 7/30. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/114:25 pmSEA - LGW
1 stop17h 25mSWISS
Mon 8/256:35 pmLGW - SEA
2 stops36h 24mSWISS
Deal found 7/30$523
This United Airlines deal was found by Cheapflights users on 7/31. 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.
Mon 9/84:55 pmSEA - LHR
2 stops29h 35mUnited Airlines
Fri 9/196:30 amLHR - SEA
2 stops20h 06mUnited Airlines
Deal found 7/31$526

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 July 31, 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

Tue 9/2

3:05 pm-2:35 pm

1 stop15h 30m

London Heathrow

Tue 9/30

6:15 am-11:15 am

1 stop13h 00m

$512

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 8/18

3:45 pm-11:45 am

1 stop12h 00m

London Gatwick

Sun 8/31

3:40 pm-5:50 pm

1 stop34h 10m

$513

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 8/13

3:15 pm-1:30 pm

1 stop14h 15m

London Heathrow

Wed 8/20

6:15 am-11:15 am

1 stop13h 00m

$513

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 9/10

1:30 pm-6:50 am

Nonstop9h 20m

London Heathrow

Wed 9/24

9:50 am-11:35 am

Nonstop9h 45m

$516

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Thu 10/30

3:35 pm-11:20 pm

2 stops24h 45m

London Stansted

Fri 11/14

6:30 am-5:00 pm

2 stops18h 30m

$517

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 8/11

4:25 pm-4:25 pm

1 stop16h 00m

London Heathrow

Mon 8/18

8:05 pm-6:36 pm

2 stops30h 31m

$518

SeattleLondon

SEA - LTN

SEALTN

Seattle/Tacoma Intl

Mon 9/8

7:35 pm-4:00 pm

1 stop12h 25m

London Luton

Tue 9/16

10:00 am-5:50 pm

1 stop15h 50m

$518

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 9/3

2:29 pm-2:10 pm

1 stop15h 41m

London Heathrow

Tue 9/16

9:30 am-7:31 pm

1 stop18h 01m

$519

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 9/8

7:15 am-9:35 am

1 stop18h 20m

London Heathrow

Wed 10/1

8:30 am-6:36 pm

2 stops18h 06m

$521

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 8/26

3:45 pm-9:15 pm

2 stops21h 30m

London Gatwick

Tue 9/2

9:40 am-5:50 pm

2 stops16h 10m

$521

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

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 July 31, 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 July 31, 2025.

The most flights from USWA to GB0 are scheduled on a Monday (22 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (16 on average).

Reviews of airlines servicing United Kingdom

Get insights into the airlines that provide service to United Kingdom. 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 United Kingdom. Reviews last updated July 31, 2025.
Peruse reviews from past customers who have flown with Delta, KLM, and Austrian Airlines from Washington to the United Kingdom 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.
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Austrian Airlines
7.6
Good
823 reviews
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Finnair
7.6
Good
1,316 reviews
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air France
7.5
Good
1,465 reviews
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

  • 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 $258. Icelandair flights start at $331 while deals on JetBlue start at $366 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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$213Average$1,040FlexibilityNo cancel feeOn-time62%
LufthansaCheapest$378Average$887FlexibilityNo cancel feeOn-time76%
IcelandairCheapest$479Average$804FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$532Average$741FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$547Average$945FlexibilityNo cancel feeOn-time69%
FinnairCheapest$556Average$729FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$565Average$970FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$568Average$870FlexibilityNo cancel feeOn-time71%
Aer LingusCheapest$572Average$887FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$574Average$949FlexibilityNo cancel feeOn-time75%

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