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Cheap flights from the United Kingdom to Washington from £389

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 7/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SEA
9 Jul — 16 Jul1
1 adult

Cheap flight deals from United Kingdom to Washington

Keep the following information in mind while searching for United Kingdom to Washington flight deals. Data was last updated 4 July 2025.

Round-trip from

£471

One-way from

£392

Popular in

August

Cheapest in

January

Average price

£719

Good round-trip deal

£512 or less

Good one-way deal

£541 or less
Air Canada
  • Air Canada
  • 11/11-17/11
  • 4 total stops
  • 36h 56m total
  • United Kingdom to Washington
25/8
  • 25/8
  • 3 total stops
  • 28h 30m total
  • United Kingdom to Washington
Highest demand for flights based on searches. 15% potential increase in price (£72 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£12 potential savings vs. average return price).
Average for round-trip flights in July 2025
Price to beat on a round-trip flight from United Kingdom to Washington.
Price to beat on a one-way flight from United Kingdom to Washington.

Find flight deals from United Kingdom to Washington

Cheapest flights from United Kingdom to Washington
Explore the most affordable flight options available from United Kingdom to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 July 2025.

Tue 11/1107:40LHR - SEA
2 stops19h 36mMultiple Airlines
Mon 17/1105:50SEA - LHR
2 stops17h 20mMultiple Airlines
Deal found 1/7£471
Thu 28/810:45LGW - SEA
2 stops21h 14mMultiple Airlines
Sun 14/919:00SEA - LGW
1 stop11h 40mMultiple Airlines
Deal found 2/7£472
Wed 29/1018:40LGW - SEA
2 stops35h 35mSWISS
Mon 3/1113:20SEA - LGW
2 stops20h 30mSWISS
Deal found 2/7£473
Mon 10/1106:30LHR - SEA
1 stop13h 40mUnited Airlines
Sun 16/1106:20SEA - LHR
2 stops20h 55mUnited Airlines
Deal found 1/7£473
Thu 11/908:40LHR - SEA
2 stops17h 56mAir Canada
Thu 18/912:00SEA - LHR
1 stop14h 00mAir Canada
Deal found 1/7£473
Thu 2/1015:40LGW - SEA
1 stop13h 00mIcelandair
Sat 11/1019:00SEA - LGW
1 stop11h 40mIcelandair
Deal found 3/7£474
Mon 10/1117:10LHR - SEA
2 stops38h 05mSWISS
Mon 17/1114:30SEA - LHR
2 stops20h 45mSWISS
Deal found 1/7£474
Tue 4/1112:15LHR - SEA
1 stop12h 45mIcelandair
Mon 10/1114:35SEA - LHR
1 stop12h 15mIcelandair
Deal found 2/7£475
Sat 13/914:10LHR - SEA
1 stop27h 11mLufthansa
Sat 27/906:30SEA - LHR
2 stops17h 50mLufthansa
Deal found 2/7£476
Thu 28/812:35LTN - SEA
2 stops33h 15mMultiple Airlines
Sun 31/816:00SEA - LTN
2 stops21h 30mMultiple Airlines
Deal found 1/7£476
Thu 28/819:30LHR - SEA
1 stop26h 20mScandinavian Airlines
Sun 31/816:00SEA - LHR
1 stop17h 40mScandinavian Airlines
Deal found 2/7£477
Mon 25/817:25LHR - SEA
Nonstop10h 20mAir France
Wed 10/920:25SEA - LHR
Nonstop9h 50mAir France
Deal found 1/7£481

Cheapflights Fare Finder

Customise your flight search to find flights from United Kingdom to Washington 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 858,174 searches. Data last updated 4 July 2025.
Use the filters below to find and compare flights from the United Kingdom to Washington that are best for you.

Fly from

United Kingdom

Fly to

Washington

Route

Depart

Return

Price

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 11/11

07:40-19:16

2 stops19h 36m

Seattle/Tacoma Intl

Mon 17/11

05:50-07:10

2 stops17h 20m

£471

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Thu 28/8

10:45-23:59

2 stops21h 14m

Seattle/Tacoma Intl

Sun 14/9

19:00-14:40

1 stop11h 40m

£472

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Wed 29/10

18:40-23:15

2 stops35h 35m

Seattle/Tacoma Intl

Mon 3/11

13:20-17:50

2 stops20h 30m

£473

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 10/11

06:30-12:10

1 stop13h 40m

Seattle/Tacoma Intl

Mon 17/11

09:25-10:50

2 stops17h 25m

£473

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 11/9

08:40-18:36

2 stops17h 56m

Seattle/Tacoma Intl

Thu 18/9

12:00-10:00

1 stop14h 00m

£473

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Thu 2/10

15:40-20:40

1 stop13h 00m

Seattle/Tacoma Intl

Sat 11/10

19:00-14:40

1 stop11h 40m

£474

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 10/11

17:10-23:15

2 stops38h 05m

Seattle/Tacoma Intl

Mon 17/11

14:30-19:15

2 stops20h 45m

£474

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 4/11

12:15-17:00

1 stop12h 45m

Seattle/Tacoma Intl

Mon 10/11

14:35-10:50

1 stop12h 15m

£475

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sat 13/9

14:10-09:21

1 stop27h 11m

Seattle/Tacoma Intl

Sat 27/9

06:30-08:20

2 stops17h 50m

£476

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Thu 28/8

12:35-13:50

2 stops33h 15m

Seattle/Tacoma Intl

Sun 31/8

16:00-21:30

2 stops21h 30m

£476

Flights are sorted by cheapest return flights first.

Deals found on 30/6

Showing 1-10 of 60 results
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Best time to book a flight from United Kingdom to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington from United Kingdom with our price prediction graph.
Estimated return 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 the United Kingdom to Washington

What is the cheapest month to book a flight from United Kingdom to State of Washington?

Currently, January is the cheapest month in which you can book a flight from United Kingdom to State of Washington (average of £622). Flying from United Kingdom to State of Washington in July is currently the most expensive (average of £946). 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 GB to WA?

Find hourly flight availability from United Kingdom to Washington. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 4 July 2025.

When flying from United Kingdom to State of Washington, 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 United Kingdom to State of Washington

Explore weekly flight availability from United Kingdom to Washington. 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 4 July 2025.

The most flights from GB0 to USWA are scheduled on a Monday (22 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (11 on average).

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. 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 Washington. Reviews last updated 4 July 2025.
Get a feel of what it's like to fly with Delta, KLM, andFinnair from the United Kingdom to Washington by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Boarding

8.2

Crew

8.5

Overall

8.0

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!
8.0
Very Good

Boarding

8.2

Crew

8.5

Overall

8.0

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!

Boarding

8.2

Crew

8.5

Overall

8.0

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!

Boarding

8.2

Crew

8.5

Overall

8.0

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!

Boarding

8.2

Crew

8.5

Overall

8.0

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!

Boarding

8.2

Crew

8.5

Overall

8.0

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 United Kingdom to Washington. 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 United Kingdom to State of Washington one-way?

    £396 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Aer Lingus and Icelandair, with prices starting from £404 and £424, respectively.

  • Can I find deals for flights from United Kingdom to Washington that include hotel bookings?

    Yes. In addition to deals on United Kingdom to Washington flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from United Kingdom to Washington?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from United Kingdom to Washington.

  • Can I find deals for business class flights from United Kingdom to Washington?

    Yes. Cheapflights offers flight deals from United Kingdom to Washington 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 United Kingdom to State of Washington?

    Currently, January is the cheapest month in which you can book a flight from United Kingdom to State of Washington (average of £622). Flying from United Kingdom to State of Washington in July is currently the most expensive (average of £946). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for United Kingdom to Washington

See prices for flight routes from nearby airports that may be better suited for you.

Top 10 airlines flying from United Kingdom to Washington

Discover the top 10 airlines that operate flights from United Kingdom to Washington. 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 858,174 searches. Data last updated 4 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£7Average£760FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IcelandairCheapest£320Average£594FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
United AirlinesCheapest£341Average£617FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air FranceCheapest£379Average£605FlexibilityNo cancel feeOn-time77%
Search Air France flights
LufthansaCheapest£385Average£563FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
FinnairCheapest£397Average£600FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£400Average£644FlexibilityNo cancel feeOn-time75%
Search KLM flights
Air CanadaCheapest£414Average£576FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
British AirwaysCheapest£418Average£798FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Scandinavian AirlinesCheapest£434Average£653FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights

Fly with Cheapflights

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How does Cheapflights help users find flights from United Kingdom to Washington?

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Why should you use Cheapflights to find cheap flight tickets from United Kingdom to Washington?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from United Kingdom to Washington.

Can Cheapflights find flights from United Kingdom to Washington with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from United Kingdom to Washington flexibly with Cheapflights today.

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