Cheap flights from the United Kingdom to Washington from £280

LHR — SEA
10 Dec — 17 Dec1
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

Thu 10/1209:25 -
Nonstop10h 00m
Fri 25/1218:45 -
Nonstop9h 25m
Deal found 5/11£407
Thu 10/1209:25 -
Nonstop10h 00m
Thu 24/1213:40 -
Nonstop9h 30m
Deal found 8/11£409
Thu 3/1214:45 -
Nonstop10h 15m
Thu 10/1218:45 -
Nonstop9h 35m
Deal found 9/11£415
Fri 20/1106:30 -
1 stop13h 17m
Sat 28/1116:50 -
Nonstop9h 50m
Deal found 5/11£416
Tue 24/1114:45 -
Nonstop10h 15m
Thu 3/1218:45 -
Nonstop9h 35m
Deal found 9/11£417
Wed 25/1107:40 -
1 stop13h 20m
Wed 2/1215:15 -
1 stop12h 35m
Deal found 5/11£418
Fri 25/1212:15 -
1 stop12h 45m
Tue 29/1214:35 -
1 stop12h 15m
Deal found 5/11£418
Thu 3/1213:50 -
1 stop16h 48m
Mon 7/1218:45 -
Nonstop9h 25m
Deal found 7/11£419
Tue 24/1108:20 -
1 stop16h 39m
Thu 3/1210:52 -
1 stop13h 43m
Deal found 9/11£421
Thu 10/1216:30 -
1 stop16h 17m
Mon 14/1209:15 -
1 stop13h 20m
Deal found 9/11£421
Tue 24/1108:20 -
1 stop16h 39m
Tue 1/1210:33 -
1 stop14h 02m
Deal found 8/11£422
Thu 24/1213:50 -
1 stop17h 18m
Fri 8/109:58 -
1 stop14h 37m
Deal found 9/11£423

Find flight deals from United Kingdom to Washington

Round-trip from

£407

One-way from

£280

Popular in

August

Cheapest in

February

Average price

£492

Good round-trip deal

£423 or less

Good one-way deal

£391 or less
British Airways
  • British Airways
  • 10/12-25/12
  • Nonstop
  • 19h 25m total
  • United Kingdom to Washington
26/4-31/12
  • 26/4-31/12
  • 3 total stops
  • 43h 55m total
  • United Kingdom to Washington
Highest demand for flights based on searches. 8% potential increase in price (£37 potential increase over avg. return price).
Cheapest flight prices on average. 1% potential price decrease (£6 potential savings vs. average return price).
Average for round-trip flights in November 2026
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.

Cheapflights Fare Finder

 
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

ManchesterSeattle

MAN Manchester - SEA Seattle/Tacoma Intl

MANSEA

Manchester

Mon 12/4

21:40-14:40

3 stops49h 00m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£303

BirminghamSeattle

BHX Birmingham - SEA Seattle/Tacoma Intl

BHXSEA

Birmingham

Mon 11/1

07:55-17:00

2 stops17h 05m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£352

ManchesterSeattle

MAN Manchester - SEA Seattle/Tacoma Intl

MANSEA

Manchester

Mon 7/12

07:30-17:00

3 stops41h 30m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£362

ManchesterSeattle

MAN Manchester - SEA Seattle/Tacoma Intl

MANSEA

Manchester

Wed 2/12

13:25-17:00

3 stops35h 35m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£365

GlasgowSeattle

GLA Glasgow Intl - SEA Seattle/Tacoma Intl

GLASEA

Glasgow Intl

Tue 26/1

22:05-17:00

3 stops50h 55m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£366

GlasgowSeattle

GLA Glasgow Intl - SEA Seattle/Tacoma Intl

GLASEA

Glasgow Intl

Mon 25/1

20:40-17:00

3 stops52h 20m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£367

LondonSeattle

LHR London Heathrow - SEA Seattle/Tacoma Intl

LHRSEA

London Heathrow

Fri 22/1

06:30-11:50

1 stop13h 20m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£394

LondonSeattle

LGW London Gatwick - SEA Seattle/Tacoma Intl

LGWSEA

London Gatwick

Wed 21/4

09:25-22:29

2 stops21h 04m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£396
Fastest return journey

LondonSeattle

LGW London Gatwick - SEA Seattle/Tacoma Intl

LGWSEA

London Gatwick

Wed 10/3

10:00-14:55

1 stop12h 55m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£396

LondonSeattle

LHR London Heathrow - SEA Seattle/Tacoma Intl

LHRSEA

London Heathrow

Thu 14/1

11:45-22:02

2 stops18h 17m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£398

Flights are sorted by cheapest return flights first.

Deals found on 5/11

Showing 1-10 of 60 resultsSorted by cheapest first
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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

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 £501). Flying from United Kingdom to State of Washington in July is currently the most expensive (average of £656). 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?

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

The most flights from GB0 to USWA are scheduled on a Thursday (19 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (13 on average).

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

Booking 83 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 a feel of what it's like to fly with Alaska Airlines,Virgin Atlantic, andAer Lingus 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

8.1

Entertainment

7.0

Crew

8.5

Overall

7.9

Food

7.0

Comfort

7.8

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.

Boarding

8.1

Entertainment

7.0

Crew

8.5

Overall

7.9

Food

7.0

Comfort

7.8

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.

Boarding

8.1

Entertainment

7.0

Crew

8.5

Overall

7.9

Food

7.0

Comfort

7.8

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.

Boarding

8.1

Entertainment

7.0

Crew

8.5

Overall

7.9

Food

7.0

Comfort

7.8

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.

Boarding

8.1

Entertainment

7.0

Crew

8.5

Overall

7.9

Food

7.0

Comfort

7.8

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.

Boarding

8.1

Entertainment

7.0

Crew

8.5

Overall

7.9

Food

7.0

Comfort

7.8

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

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

    KLM, Delta, and Alaska Airlines can get you from United Kingdom to State of Washington in just under 10h 05m. Your travel time can differ by up to 3h 12m. 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?

    £316 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 Alaska Airlines, with prices starting from £339 and £348, 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 £501). Flying from United Kingdom to State of Washington in July is currently the most expensive (average of £656). 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

Top 10 airlines flying from United Kingdom to Washington

AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£325Average£594FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
LufthansaCheapest£335Average£463FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest£363Average£646FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£370Average£490FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Aer LingusCheapest£391Average£732FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
DeltaCheapest£394Average£654FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Virgin AtlanticCheapest£406Average£742FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Air FranceCheapest£410Average£602FlexibilityNo cancel feeOn-time77%
Search Air France flights
KLMCheapest£417Average£778FlexibilityNo cancel feeOn-time75%
Search KLM flights
Alaska AirlinesCheapest£419Average£652FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights

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