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$233+ 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 3/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LHR
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
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 January 29, 2026.

This Gotogate deal was found by Cheapflights users on 1/28. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/162:35 pm
SEA
-
EDI
1 stop11h 25m
Icelandair
Tue 3/311:00 am
EDI
-
SEA
1 stop14h 00m
Icelandair
Deal found 1/28$527
This oojo deal was found by Cheapflights users on 1/28. 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.
Sun 10/47:00 pm
SEA
-
LGW
1 stop11h 40m
Icelandair
Fri 10/93:40 pm
LGW
-
SEA
1 stop13h 00m
Icelandair
Deal found 1/28$542
This oojo deal was found by Cheapflights users on 1/27. 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.
Wed 4/153:40 pm
SEA
-
LHR
1 stop12h 15m
Icelandair
Fri 4/241:05 pm
LHR
-
SEA
1 stop12h 50m
Icelandair
Deal found 1/27$542
This Mytrip deal was found by Cheapflights users on 1/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/32:35 pm
SEA
-
STN
2 stops19h 45m
Multiple Airlines
Tue 3/106:30 am
STN
-
SEA
2 stops18h 30m
Multiple Airlines
Deal found 1/28$543
This oojo deal was found by Cheapflights users on 1/28. 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 3/173:35 pm
SEA
-
LGW
1 stop12h 20m
Icelandair
Wed 4/13:40 pm
LGW
-
SEA
1 stop34h 15m
Icelandair
Deal found 1/28$543
This Trip.com deal was found by Cheapflights users on 1/26. 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.
Mon 3/163:35 pm
SEA
-
LHR
2 stops22h 45m
Multiple Airlines
Sun 3/296:40 am
LHR
-
SEA
2 stops43h 15m
Multiple Airlines
Deal found 1/26$543
This Mytrip deal was found by Cheapflights users on 1/27. 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 4/163:40 pm
SEA
-
STN
2 stops19h 55m
Multiple Airlines
Tue 4/216:30 am
STN
-
SEA
2 stops22h 10m
Multiple Airlines
Deal found 1/27$544
This oojo deal was found by Cheapflights users on 1/28. 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 3/243:35 pm
SEA
-
LGW
1 stop12h 20m
Icelandair
Tue 3/313:40 pm
LGW
-
SEA
1 stop13h 00m
Icelandair
Deal found 1/28$544
This oojo deal was found by Cheapflights users on 1/27. 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.
Wed 4/13:40 pm
SEA
-
LHR
1 stop12h 15m
Icelandair
Sun 4/129:25 pm
LHR
-
SEA
1 stop31h 15m
Icelandair
Deal found 1/27$544
This oojo deal was found by Cheapflights users on 1/28. 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.
Fri 10/27:00 pm
SEA
-
LGW
1 stop11h 40m
Icelandair
Tue 10/63:40 pm
LGW
-
SEA
1 stop34h 15m
Icelandair
Deal found 1/28$545
This oojo deal was found by Cheapflights users on 1/27. 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.
Sun 4/123:40 pm
SEA
-
LHR
1 stop20h 40m
Icelandair
Fri 4/241:05 pm
LHR
-
SEA
1 stop15h 35m
Icelandair
Deal found 1/27$545
This Mytrip deal was found by Cheapflights users on 1/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/32:35 pm
SEA
-
LTN
2 stops21h 30m
Multiple Airlines
Tue 3/109:00 am
LTN
-
SEA
2 stops16h 00m
Multiple Airlines
Deal found 1/28$545

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$527
(Gotogate)

One-way from

$233
(Trip.com)

Popular in

June

Cheapest in

October

Average price

$650

Good round-trip deal

$618 or less

Good one-way deal

$370 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 ($137 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 January 2026
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 January 29, 2026.
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 - LTN

SEALTN

Seattle/Tacoma Intl

Tue 3/3

2:35 pm-8:05 pm

2 stops21h 30m

London Luton

Tue 3/10

9:00 am-6:00 pm

2 stops16h 00m

$545

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Wed 4/29

3:40 pm-9:40 pm

2 stops22h 00m

London Stansted

Mon 5/11

11:35 am-8:40 pm

2 stops17h 05m

$549

SeattleEdinburgh

SEA - EDI

SEAEDI

Seattle/Tacoma Intl

Mon 4/27

7:00 pm-1:20 pm

1 stop10h 20m

Edinburgh Turnhouse

Sun 5/10

2:15 pm-5:55 pm

1 stop11h 40m

$552

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Fri 5/1

7:00 pm-12:50 am

2 stops21h 50m

London Stansted

Sun 5/10

5:55 am-8:40 pm

2 stops22h 45m

$559

SeattleLondon

SEA - LTN

SEALTN

Seattle/Tacoma Intl

Thu 2/26

2:35 pm-8:30 pm

2 stops21h 55m

London Luton

Thu 3/5

9:00 am-5:00 pm

2 stops16h 00m

$585

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 2/23

5:30 am-10:30 am

1 stop21h 00m

London Heathrow

Thu 3/5

11:45 am-11:25 am

1 stop31h 40m

$621

SeattleEdinburgh

SEA - EDI

SEAEDI

Seattle/Tacoma Intl

Tue 4/21

1:29 pm-2:35 pm

2 stops17h 06m

Edinburgh Turnhouse

Thu 4/30

11:25 am-9:23 pm

1 stop17h 58m

$621

SeattleEdinburgh

SEA - EDI

SEAEDI

Seattle/Tacoma Intl

Mon 3/30

10:10 am-11:05 pm

2 stops28h 55m

Edinburgh Turnhouse

Fri 4/10

9:00 am-7:18 pm

2 stops18h 18m

$623

SeattleEdinburgh

SEA - EDI

SEAEDI

Seattle/Tacoma Intl

Wed 2/25

7:00 am-7:55 am

2 stops16h 55m

Edinburgh Turnhouse

Wed 3/11

11:30 am-10:45 pm

2 stops18h 15m

$624

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 2/24

5:00 pm-8:10 pm

2 stops19h 10m

London Heathrow

Thu 3/5

8:40 am-11:25 am

1 stop34h 45m

$626

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

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 $446). Flying from State of Washington to United Kingdom in June is currently the most expensive (average of $651). 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 January 29, 2026.

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 January 29, 2026.

The most flights from USWA to GB0 are scheduled on a Tuesday (21 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (7 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 $552, Icelandair can have you in United Kingdom from State of Washington in 10h 20m. Airlines will cover a distance of 4468 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 $162. JetBlue flights start at $181 while deals on WestJet start at $225 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 $446). Flying from State of Washington to United Kingdom in June is currently the most expensive (average of $651). 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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$213Average$946FlexibilityNo cancel feeOn-time62%
Scandinavian AirlinesCheapest$465Average$718FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$483Average$784FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$500Average$882FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$517Average$838FlexibilityNo cancel feeOn-time71%
Air FranceCheapest$532Average$842FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$535Average$899FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$547Average$923FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$553Average$980FlexibilityNo cancel feeOn-time75%
FinnairCheapest$556Average$694FlexibilityNo cancel feeOn-time76%

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