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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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LHR
Jul 14 — Jul 211
Mon 7/14
Mon 7/21
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 9, 2025.

Round-trip from

$406
(Mytrip)

One-way from

$220
(Icelandair)

Popular in

June

Cheapest in

October

Average price

$977

Good round-trip deal

$642 or less

Good one-way deal

$427 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 ($147 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 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 9, 2025.

This Mytrip deal was found by Cheapflights users on 7/7. 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 8/37:35 pmSEA - GLA
1 stop17h 50mMultiple Airlines
Tue 8/197:35 amGLA - SEA
1 stop18h 15mMultiple Airlines
Deal found 7/7$406
This Mytrip deal was found by Cheapflights users on 7/8. 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 8/117:35 pmSEA - EDI
1 stop18h 15mMultiple Airlines
Wed 8/276:55 amEDI - SEA
1 stop18h 55mMultiple Airlines
Deal found 7/8$444
This Trip.com deal was found by Cheapflights users on 7/8. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/67:35 pmSEA - EDI
1 stop16h 15mAer Lingus
Fri 8/159:15 amEDI - SEA
1 stop16h 35mAer Lingus
Deal found 7/8$499
This FlightHub deal was found by Cheapflights users on 7/7. 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.
Sat 10/47:00 pmSEA - EDI
1 stop10h 20mIcelandair
Sun 10/122:15 pmEDI - SEA
1 stop14h 25mIcelandair
Deal found 7/7$502
This Cheapflightsfares deal was found by Cheapflights users on 7/9. 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.
Thu 11/132:35 pmSEA - GLA
1 stop11h 20mIcelandair
Wed 11/1912:35 pmGLA - SEA
1 stop12h 25mIcelandair
Deal found 7/9$509
This Flightnetwork deal was found by Cheapflights users on 7/9. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/37:35 pmSEA - GLA
1 stop16h 05mAer Lingus
Tue 8/1912:00 pmGLA - SEA
1 stop13h 50mAer Lingus
Deal found 7/9$534
This Gotogate deal was found by Cheapflights users on 7/9. 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 10/2710:05 amSEA - LHR
1 stop18h 45mMultiple Airlines
Sun 11/93:00 pmLHR - SEA
2 stops15h 06mMultiple Airlines
Deal found 7/9$551
This Ovago deal was found by Cheapflights users on 7/9. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/271:30 pmSEA - LHR
Nonstop9h 20mBritish Airways
Mon 8/119:35 pmLHR - SEA
2 stops32h 51mBritish Airways
Deal found 7/9$552
This Mytrip deal was found by Cheapflights users on 7/8. 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 8/257:20 amSEA - STN
2 stops29h 40mMultiple Airlines
Mon 9/810:00 pmSTN - SEA
3 stops32h 16mMultiple Airlines
Deal found 7/8$553
This Cheapflightsfares deal was found by Cheapflights users on 7/8. 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.
Sun 8/37:00 pmSEA - LGW
1 stop11h 40mIcelandair
Fri 8/153:40 pmLGW - SEA
1 stop13h 00mIcelandair
Deal found 7/8$553
This FlightHub deal was found by Cheapflights users on 7/7. 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.
Fri 10/34:20 pmSEA - EDI
2 stops33h 05mScandinavian Airlines
Sat 10/1811:10 amEDI - SEA
2 stops34h 50mScandinavian Airlines
Deal found 7/7$553
This Cheapflightsfares deal was found by Cheapflights users on 7/8. 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.
Thu 8/283:45 pmSEA - LHR
1 stop12h 10mIcelandair
Thu 9/41:05 pmLHR - SEA
1 stop12h 45mIcelandair
Deal found 7/8$553

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 9, 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

Sun 8/3

7:35 pm-9:25 pm

1 stop17h 50m

Glasgow Intl

Tue 8/19

7:35 am-5:50 pm

1 stop18h 15m

$406

SeattleEdinburgh

SEA - EDI

SEAEDI

Seattle/Tacoma Intl

Mon 8/11

7:35 pm-9:50 pm

1 stop18h 15m

Edinburgh Turnhouse

Wed 8/27

6:55 am-5:50 pm

1 stop18h 55m

$444

SeattleEdinburgh

SEA - EDI

SEAEDI

Seattle/Tacoma Intl

Wed 8/6

7:35 pm-7:50 pm

1 stop16h 15m

Edinburgh Turnhouse

Fri 8/15

9:15 am-5:50 pm

1 stop16h 35m

$499

SeattleEdinburgh

SEA - EDI

SEAEDI

Seattle/Tacoma Intl

Sat 10/4

7:00 pm-1:20 pm

1 stop10h 20m

Edinburgh Turnhouse

Sun 10/12

2:15 pm-8:40 pm

1 stop14h 25m

$502

SeattleGlasgow

SEA - GLA

SEAGLA

Seattle/Tacoma Intl

Thu 11/13

2:35 pm-9:55 am

1 stop11h 20m

Glasgow Intl

Wed 11/19

12:35 pm-5:00 pm

1 stop12h 25m

$509

SeattleGlasgow

SEA - GLA

SEAGLA

Seattle/Tacoma Intl

Sun 8/3

7:35 pm-7:40 pm

1 stop16h 05m

Glasgow Intl

Tue 8/19

12:00 pm-5:50 pm

1 stop13h 50m

$534

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 10/27

10:05 am-11:50 am

1 stop18h 45m

London Heathrow

Sun 11/9

3:00 pm-10:06 pm

2 stops15h 06m

$551

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 7/27

1:30 pm-6:50 am

Nonstop9h 20m

London Heathrow

Mon 8/11

9:35 pm-10:26 pm

2 stops32h 51m

$552

SeattleEdinburgh

SEA - EDI

SEAEDI

Seattle/Tacoma Intl

Fri 10/3

4:20 pm-9:25 am

2 stops33h 05m

Edinburgh Turnhouse

Sat 10/18

11:10 am-2:00 pm

2 stops34h 50m

$553

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 8/3

7:00 pm-2:40 pm

1 stop11h 40m

London Gatwick

Fri 8/15

3:40 pm-8:40 pm

1 stop13h 00m

$553

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/7

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 $1,096). 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 9, 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 9, 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 9, 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
7,954 reviews

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

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
7,954 reviews
Delta
8.0
Very good
7,954 reviews

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

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
1,370 reviews
Delta
8.0
Very good
7,954 reviews

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

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
806 reviews
Delta
8.0
Very good
7,954 reviews

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

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
1,312 reviews
Delta
8.0
Very good
7,954 reviews

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

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
1,468 reviews
Delta
8.0
Very good
7,954 reviews

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

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 Icelandair, which is currently one of the cheapest options available, starting at $220. SWISS flights start at $391 while deals on United Airlines 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 $1,096). 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 9, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$378Average$897FlexibilityNo cancel feeOn-time76%
IcelandairCheapest$487Average$804FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$498Average$949FlexibilityNo cancel feeOn-time69%
Scandinavian AirlinesCheapest$532Average$741FlexibilityNo cancel feeOn-time77%
FinnairCheapest$556Average$725FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$568Average$874FlexibilityNo cancel feeOn-time71%
KLMCheapest$574Average$1,032FlexibilityNo cancel feeOn-time75%
IberiaCheapest$579Average$733FlexibilityNo cancel feeOn-time77%
Air FranceCheapest$583Average$1,046FlexibilityNo cancel feeOn-time77%
Aer LingusCheapest$583Average$923FlexibilityNo cancel feeOn-timeN/A

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