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Cheap flights from the United Kingdom to Washington from £284

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 14/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SEA
9 Aug — 16 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from United Kingdom to Washington

Enter your travel dates to find the best prices.

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 10 July 2026.

Thu 13/809:50
LHR
-
SEA
Nonstop9h 45m
British Airways
Fri 21/820:20
SEA
-
LHR
Nonstop9h 25m
British Airways
Deal found 7/7£450
Mon 24/815:40
LGW
-
SEA
1 stop28h 05m
Icelandair
Tue 8/919:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 5/7£453
Fri 4/915:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Fri 18/915:40
SEA
-
LGW
1 stop15h 00m
Icelandair
Deal found 7/7£454
Thu 8/1015:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Sat 17/1019:00
SEA
-
LGW
1 stop11h 35m
Icelandair
Deal found 8/7£454
Tue 1/913:00
LGW
-
SEA
1 stop12h 55m
Icelandair
Sat 31/1015:35
SEA
-
LGW
1 stop12h 20m
Icelandair
Deal found 10/7£456
Sat 26/915:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Thu 22/1019:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 9/7£457
Thu 24/1211:55
LGW
-
SEA
1 stop13h 05m
Icelandair
Mon 28/1214:35
SEA
-
LGW
1 stop12h 20m
Icelandair
Deal found 7/7£457
Fri 4/915:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Sat 19/919:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 6/7£458
Thu 27/813:00
LGW
-
SEA
1 stop15h 40m
Icelandair
Wed 9/915:40
SEA
-
LGW
1 stop15h 00m
Icelandair
Deal found 8/7£459
Fri 9/1015:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Sat 17/1019:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 6/7£459
Wed 2/915:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Wed 16/919:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 6/7£462
Thu 13/813:00
LHR
-
SEA
1 stop15h 43m
United Airlines
Fri 21/810:41
SEA
-
LHR
1 stop14h 19m
United Airlines
Deal found 7/7£470

Find 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 10 July 2026.

Round-trip from

£450

One-way from

£284

Popular in

July

Cheapest in

February

Average price

£631

Good round-trip deal

£510 or less

Good one-way deal

£271 or less
British Airways
  • British Airways
  • 13/8-21/8
  • Nonstop
  • 19h 10m total
  • United Kingdom to Washington
Search Deals
14/9
  • 14/9
  • 3 total stops
  • 31h 19m total
  • United Kingdom to Washington
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£44 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£6 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from United Kingdom to Washington.
Search Deals
Price to beat on a one-way flight from United Kingdom to Washington.
Search Deals

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 10 July 2026.
Use the filters below to find and compare flights from the United Kingdom to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Mon 12/10

20:35-15:40

2 stops27h 05m

Seattle/Tacoma Intl

Tue 20/10

18:05-19:55

2 stops17h 50m

£492

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Thu 27/8

18:50-16:00

2 stops29h 10m

Seattle/Tacoma Intl

Thu 10/9

18:05-00:50

2 stops22h 45m

£515

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 7/9

06:30-11:47

1 stop13h 17m

Seattle/Tacoma Intl

Mon 21/9

18:20-12:10

Nonstop9h 50m

£541

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 21/8

06:55-16:59

1 stop18h 04m

Seattle/Tacoma Intl

Fri 11/9

07:00-06:55

2 stops15h 55m

£545

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 23/12

12:20-14:45

Nonstop10h 25m

Seattle/Tacoma Intl

Sat 23/1

16:45-10:30

Nonstop9h 45m

£554

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sun 20/12

12:20-14:45

Nonstop10h 25m

Seattle/Tacoma Intl

Mon 18/1

16:45-10:30

Nonstop9h 45m

£555

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Wed 2/9

05:40-15:40

2 stops18h 00m

Seattle/Tacoma Intl

Wed 16/9

17:40-22:40

2 stops21h 00m

£563

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 13/8

06:30-16:27

1 stop17h 57m

Seattle/Tacoma Intl

Thu 27/8

07:15-06:20

1 stop15h 05m

£564

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Thu 8/10

10:25-23:59

2 stops21h 34m

Seattle/Tacoma Intl

Thu 22/10

13:30-09:25

1 stop11h 55m

£565

LondonSeattle

LCY - SEA

LCYSEA

London City

Thu 24/9

10:00-16:35

1 stop14h 35m

Seattle/Tacoma Intl

Sun 4/10

13:45-09:30

1 stop11h 45m

£569

Flights are sorted by cheapest return flights first.

Deals found on 10/7

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
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6

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, February is the cheapest month in which you can book a flight from United Kingdom to State of Washington (average of £291). Flying from United Kingdom to State of Washington in December is currently the most expensive (average of £829). 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 10 July 2026.

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 10 July 2026.

The most flights from GB0 to USWA are scheduled on a Tuesday (22 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (15 on average).

How far ahead should I book a flight from United Kingdom to State of Washington?

Booking 56 days in advance of your planned departure date is, on average, the best time to get cheap flights from United Kingdom to State of Washington. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 10 July 2026.
Get a feel of what it's like to fly with Alaska Airlines,KLM, andVirgin Atlantic 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.
Alaska Airlines
7.9
Good
12,654 reviews
Check prices

Food

7.1

Entertainment

7.0

Overall

7.9

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Alaska Airlines
7.9
Good
12,654 reviews
Alaska Airlines
7.9
Good
12,654 reviews
Check prices

Food

7.1

Entertainment

7.0

Overall

7.9

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
KLM
7.8
Good
1,536 reviews
Alaska Airlines
7.9
Good
12,654 reviews
Check prices

Food

7.1

Entertainment

7.0

Overall

7.9

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Virgin Atlantic
7.5
Good
693 reviews
Alaska Airlines
7.9
Good
12,654 reviews
Check prices

Food

7.1

Entertainment

7.0

Overall

7.9

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Icelandair
7.0
Good
704 reviews
Alaska Airlines
7.9
Good
12,654 reviews
Check prices

Food

7.1

Entertainment

7.0

Overall

7.9

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
British Airways
6.7
Okay
8,108 reviews
Alaska Airlines
7.9
Good
12,654 reviews
Check prices

Food

7.1

Entertainment

7.0

Overall

7.9

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.

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.

  • How long is the flight from United Kingdom to State of Washington?

    KLM, United Airlines, and Delta can get you from United Kingdom to State of Washington in just under 10h 25m. Your travel time can differ by up to 7h 39m. There are 4783 mi between United Kingdom and State of Washington. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from United Kingdom to State of Washington one-way?

    £349 is the cheapest one-way deal found within the past few days, from British Airways. You may also be able to find cheap deals on Icelandair and Virgin Atlantic, with prices starting from £353 and £372, 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, February is the cheapest month in which you can book a flight from United Kingdom to State of Washington (average of £291). Flying from United Kingdom to State of Washington in December is currently the most expensive (average of £829). 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 United Kingdom to Washington

See prices for flight routes from nearby airports that may be better suited for you.
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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 10 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£270Average£728FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
LufthansaCheapest£335Average£562FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£341Average£558FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
British AirwaysCheapest£363Average£628FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£392Average£701FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
United AirlinesCheapest£431Average£665FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
KLMCheapest£437Average£778FlexibilityNo cancel feeOn-time75%
Search KLM flights
DeltaCheapest£442Average£628FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air FranceCheapest£451Average£738FlexibilityNo cancel feeOn-time77%
Search Air France flights
Scandinavian AirlinesCheapest£462Average£685FlexibilityNo 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?

Cheapflights helps you search for flights from United Kingdom to Washington via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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.

Can Cheapflights notify me if prices for flights from United Kingdom to Washington become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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