Washington

$375+ Cheap flights from the United Kingdom to Washington

LHR — SEA
Dec 11 — Dec 181
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Cheap flight deals from United Kingdom to Washington

Cheapest flights from United Kingdom to Washington

Thu 12/109:25 am -
Nonstop10h 00m
Thu 12/241:40 pm -
Nonstop9h 30m
Deal found 11/8$549
Thu 12/32:45 pm -
Nonstop10h 15m
Thu 12/106:45 pm -
Nonstop9h 35m
Deal found 11/9$557
Tue 11/242:45 pm -
Nonstop10h 15m
Thu 12/36:45 pm -
Nonstop9h 35m
Deal found 11/9$559
Thu 12/109:25 am -
Nonstop10h 00m
Fri 12/256:45 pm -
Nonstop9h 25m
Deal found 11/8$560
Thu 12/31:50 pm -
1 stop16h 48m
Mon 12/76:45 pm -
Nonstop9h 25m
Deal found 11/7$562
Thu 12/103:40 pm -
1 stop17h 07m
Thu 12/246:45 pm -
Nonstop9h 25m
Deal found 11/9$564
Thu 12/104:30 pm -
1 stop16h 17m
Mon 12/149:15 am -
1 stop13h 20m
Deal found 11/9$565
Tue 11/248:20 am -
1 stop16h 39m
Tue 12/11:30 pm -
Nonstop9h 30m
Deal found 11/8$566
Thu 12/241:50 pm -
1 stop17h 18m
Fri 1/89:58 am -
1 stop14h 37m
Deal found 11/9$567
Tue 12/14:30 pm -
1 stop16h 12m
Mon 12/72:07 pm -
1 stop14h 03m
Deal found 11/6$568
Tue 11/173:40 pm -
1 stop16h 55m
Thu 11/2610:33 am -
1 stop14h 02m
Deal found 11/6$569
Fri 12/2511:50 am -
1 stop16h 32m
Tue 1/1211:00 am -
1 stop15h 00m
Deal found 11/10$570

Find flight deals from United Kingdom to Washington

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$546
(Expedia)

One-way from

$375
(Kiwi.com)

Popular in

August

Cheapest in

February

Average price

$659

Good round-trip deal

$576 or less

Good one-way deal

$522 or less
Provider with most accurate pricing for London (LON)-Seattle/Tacoma Intl flight deals.
Provider most trusted by Cheapflights users for London (LON)-Seattle/Tacoma Intl flights.
From United Kingdom to Washington
One-way flight from United Kingdom to Washington
Highest demand for flights based on searches. 8% potential increase in price ($68 potential increase over avg. RT price).
Cheapest flight prices on average. 1% potential price decrease ($10 potential savings vs. average RT 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 round-trip

GlasgowSeattle

GLA Glasgow Intl - SEA Seattle/Tacoma Intl

GLASEA

Glasgow Intl

Mon 4/26

9:45 pm-9:40 am

3 stops43h 55m

Seattle/Tacoma Intl

Wed 12/31

12:00 am-9:00 am

Nonstop0h 00m

$375

BirminghamSeattle

BHX Birmingham - SEA Seattle/Tacoma Intl

BHXSEA

Birmingham

Mon 1/11

7:55 am-5:00 pm

2 stops17h 05m

Seattle/Tacoma Intl

Wed 12/31

12:00 am-9:00 am

Nonstop0h 00m

$472

ManchesterSeattle

MAN Manchester - SEA Seattle/Tacoma Intl

MANSEA

Manchester

Mon 12/7

7:30 am-5:00 pm

3 stops41h 30m

Seattle/Tacoma Intl

Wed 12/31

12:00 am-9:00 am

Nonstop0h 00m

$486

ManchesterSeattle

MAN Manchester - SEA Seattle/Tacoma Intl

MANSEA

Manchester

Wed 12/2

1:25 pm-5:00 pm

3 stops35h 35m

Seattle/Tacoma Intl

Wed 12/31

12:00 am-9:00 am

Nonstop0h 00m

$490

ManchesterSeattle

MAN Manchester - SEA Seattle/Tacoma Intl

MANSEA

Manchester

Wed 12/9

5:10 pm-5:00 pm

3 stops31h 50m

Seattle/Tacoma Intl

Wed 12/31

12:00 am-9:00 am

Nonstop0h 00m

$491

GlasgowSeattle

GLA Glasgow Intl - SEA Seattle/Tacoma Intl

GLASEA

Glasgow Intl

Tue 1/26

10:05 pm-5:00 pm

3 stops50h 55m

Seattle/Tacoma Intl

Wed 12/31

12:00 am-9:00 am

Nonstop0h 00m

$491

LondonSeattle

LGW London Gatwick - SEA Seattle/Tacoma Intl

LGWSEA

London Gatwick

Wed 3/10

10:00 am-2:55 pm

1 stop12h 55m

Seattle/Tacoma Intl

Wed 12/31

12:00 am-9:00 am

Nonstop0h 00m

$531
Quickest round-trip

LondonSeattle

LHR London Heathrow - SEA Seattle/Tacoma Intl

LHRSEA

London Heathrow

Sun 1/17

2:45 pm-4:50 pm

Nonstop10h 05m

Seattle/Tacoma Intl

Wed 12/31

12:00 am-9:00 am

Nonstop0h 00m

$532

LondonSeattle

LHR London Heathrow - SEA Seattle/Tacoma Intl

LHRSEA

London Heathrow

Thu 1/14

11:45 am-10:02 pm

2 stops18h 17m

Seattle/Tacoma Intl

Wed 12/31

12:00 am-9:00 am

Nonstop0h 00m

$533

LondonSeattle

LHR London Heathrow - SEA Seattle/Tacoma Intl

LHRSEA

London Heathrow

Mon 1/11

7:30 am-7:38 pm

2 stops20h 08m

Seattle/Tacoma Intl

Wed 12/31

12:00 am-9:00 am

Nonstop0h 00m

$534

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/9

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 round-trip 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 $672). Flying from United Kingdom to State of Washington in July is currently the most expensive (average of $880). 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 Monday (13 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (8 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

Peruse reviews from past customers who have flown with Alaska Airlines,Delta, andVirgin Atlantic from the United Kingdom to Washington to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Comfort

7.8

Crew

8.5

Entertainment

7.0

Boarding

8.1

Overall

7.9

Food

7.0

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.

Comfort

7.8

Crew

8.5

Entertainment

7.0

Boarding

8.1

Overall

7.9

Food

7.0

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.

Comfort

7.8

Crew

8.5

Entertainment

7.0

Boarding

8.1

Overall

7.9

Food

7.0

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.

Comfort

7.8

Crew

8.5

Entertainment

7.0

Boarding

8.1

Overall

7.9

Food

7.0

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.

Comfort

7.8

Crew

8.5

Entertainment

7.0

Boarding

8.1

Overall

7.9

Food

7.0

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.

Comfort

7.8

Crew

8.5

Entertainment

7.0

Boarding

8.1

Overall

7.9

Food

7.0

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?

    There are many flights that can get you from United Kingdom to State of Washington in 13h 05m. Fly via KLM, Delta, or United Airlines to get the fastest option. The distance from United Kingdom to State of Washington is about 4783 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    To fly one-way, consider booking your trip with Icelandair, which is currently one of the cheapest options available, starting at $368. Virgin Atlantic flights start at $430 while deals on Aer Lingus start at $469 one-way.

  • 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 vacation 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 $672). Flying from United Kingdom to State of Washington in July is currently the most expensive (average of $880). 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 7 airlines flying from United Kingdom to Washington

AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$380Average$803FlexibilityNo cancel feeOn-time75%
KLMCheapest$485Average$787FlexibilityNo cancel feeOn-time75%
IcelandairCheapest$534Average$782FlexibilityNo cancel feeOn-time76%
DeltaCheapest$536Average$856FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$579Average$908FlexibilityNo cancel feeOn-time72%
British AirwaysCheapest$661Average$1,013FlexibilityNo cancel feeOn-time70%
Scandinavian AirlinesCheapest$981Average$981FlexibilityNo cancel feeOn-time77%

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