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Cheap flights from Washington to the United Kingdom from $239

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to the United Kingdom departing on 9/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Washington to the United Kingdom

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
3:55 pm - 5:15 pmSEA  Seattle/Tacoma Intl-STN London Stansted
17h 20m1 stop Kastrup Copenhagen
Multiple Airlines Logo
7:05 am - 1:45 pmSTN  London Stansted-SEA Seattle/Tacoma Intl
14h 40m1 stop Kastrup Copenhagen
$642Multiple Airlines
Sun, Sep 27 - Sun, Oct 4
Multiple Airlines Logo
3:55 pm - 3:25 pmSEA  Seattle/Tacoma Intl-STN London Stansted
15h 30m1 stop Kastrup Copenhagen
Multiple Airlines Logo
6:20 am - 1:45 pmSTN  London Stansted-SEA Seattle/Tacoma Intl
15h 25m1 stop Kastrup Copenhagen
$642Multiple Airlines
Fri, Sep 25 - Fri, Oct 2
Scandinavian Airlines Logo
11:08 pm - 4:00 pmSEA  Seattle/Tacoma Intl-LHR London Heathrow
32h 52m2 stops Boston Logan Intl Kastrup Copenhagen
Scandinavian Airlines Logo
6:40 am - 1:45 pmLHR  London Heathrow-SEA Seattle/Tacoma Intl
15h 05m2 stops Stockholm Arlanda Kastrup Copenhagen
$644Scandinavian Airlines
Sat, Oct 3 - Tue, Oct 6
Scandinavian Airlines Logo
3:55 pm - 5:00 pmSEA  Seattle/Tacoma Intl-LHR London Heathrow
17h 05m2 stops Kastrup Copenhagen Stockholm Arlanda
Scandinavian Airlines Logo
6:40 am - 11:14 pmLHR  London Heathrow-SEA Seattle/Tacoma Intl
24h 34m2 stops Kastrup Copenhagen San Francisco
$658Scandinavian Airlines
Sat, Sep 19 - Mon, Sep 21
Icelandair Logo
7:00 pm - 8:20 pmSEA  Seattle/Tacoma Intl-LHR London Heathrow
17h 20m1 stop Reykjavik Keflavik Intl
Icelandair Logo
9:25 pm - 5:55 pmLHR  London Heathrow-SEA Seattle/Tacoma Intl
28h 30m1 stop Reykjavik Keflavik Intl
$704Icelandair
Thu, Oct 8 - Wed, Oct 14
Icelandair Logo
7:00 pm - 8:20 pmSEA  Seattle/Tacoma Intl-LHR London Heathrow
17h 20m1 stop Reykjavik Keflavik Intl
Icelandair Logo
1:05 pm - 5:55 pmLHR  London Heathrow-SEA Seattle/Tacoma Intl
12h 50m1 stop Reykjavik Keflavik Intl
$704Icelandair
Fri, Oct 2 - Sun, Oct 4
United Airlines Logo
7:05 pm - 11:50 amSEA  Seattle/Tacoma Intl-LHR London Heathrow
32h 45m1 stop Vancouver Intl
United Airlines Logo
6:50 am - 8:56 pmLHR  London Heathrow-SEA Seattle/Tacoma Intl
22h 06m2 stops Brussels Bruxelles-National Washington, D.C. Dulles Intl
$732United Airlines
Sat, Nov 7 - Tue, Nov 10
United Airlines Logo
8:30 am - 7:10 amSEA  Seattle/Tacoma Intl-LHR London Heathrow
38h 40m3 stops Denver Intl Newark Montreal Pierre Elliott Trudeau Intl
United Airlines Logo
6:50 am - 7:03 pmLHR  London Heathrow-SEA Seattle/Tacoma Intl
20h 13m2 stops Brussels Bruxelles-National Chicago O'Hare Intl
$740United Airlines
Sat, Nov 7 - Tue, Nov 10
Lufthansa Logo
2:50 pm - 1:00 pmSEA  Seattle/Tacoma Intl-LHR London Heathrow
14h 10m1 stop Munich Franz Josef Strauss
Lufthansa Logo
7:40 am - 11:17 pmLHR  London Heathrow-SEA Seattle/Tacoma Intl
23h 37m2 stops Munich Franz Josef Strauss Chicago O'Hare Intl
$753Lufthansa
Wed, Nov 11 - Fri, Nov 13
Lufthansa Logo
7:00 am - 4:50 pmSEA  Seattle/Tacoma Intl-LHR London Heathrow
25h 50m2 stops Chicago O'Hare Intl Frankfurt am Main
Lufthansa Logo
2:30 pm - 9:27 amLHR  London Heathrow-SEA Seattle/Tacoma Intl
26h 57m1 stop Vancouver Intl
$768Lufthansa
Tue, Nov 10 - Thu, Nov 12

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Lufthansa flights from State of Washington to United Kingdom

Our best Lufthansa deals on State of Washington to United Kingdom flight tickets
Lufthansa
Nov 8
PDX10:00 amPortland
17h 50m
1 stop
LHR11:50 amLondon Heathrow
Nov 14
LHR6:35 amLondon Heathrow
22h 38m
2 stops
PDX9:13 pmPortland
$911
Lufthansa
Nov 23
SEA1:50 pmSeattle/Tacoma Intl
19h 50m
1 stop
LCY5:40 pmLondon City
Dec 2
LCY6:15 pmLondon City
25h 45m
1 stop
SEA12:00 pmSeattle/Tacoma Intl
$928
Lufthansa
Oct 7
PDX10:10 amPortland
19h 10m
1 stop
LHR1:20 pmLondon Heathrow
Oct 14
LHR7:25 amLondon Heathrow
23h 32m
2 stops
PDX10:57 pmPortland
$939

Air Canada flights from State of Washington to United Kingdom

Our best Air Canada deals on State of Washington to United Kingdom flight tickets
Air Canada
Sep 20
PDX7:45 pmPortland
32h 05m
2 stops
LHR11:50 amLondon Heathrow
Oct 6
LHR3:05 pmLondon Heathrow
31h 46m
1 stop
PDX2:51 pmPortland
$948
Air Canada
Sep 20
PDX7:45 pmPortland
32h 05m
2 stops
LHR11:50 amLondon Heathrow
Oct 6
LHR3:05 pmLondon Heathrow
31h 46m
1 stop
PDX2:51 pmPortland
$951
Air Canada
Aug 12
PDX7:00 amPortland
19h 00m
2 stops
LHR10:00 amLondon Heathrow
Aug 25
LHR3:05 pmLondon Heathrow
28h 55m
2 stops
PDX12:00 pmPortland
$1,122

momondo Fare Finder

 
Customize your flight search to find flights from State of 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, momondo users made 832,500 searches. Data last updated August 11, 2026.
Use the filters below to find and compare flights from Washington to the United Kingdom that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleLondon

SEA Seattle/Tacoma Intl - STN London Stansted

SEASTN

Seattle/Tacoma Intl

Sun 9/27

3:55 pm-5:15 pm

1 stop17h 20m

London Stansted

Sun 10/4

7:05 am-1:45 pm

1 stop14h 40m

$642

SeattleLondon

SEA Seattle/Tacoma Intl - STN London Stansted

SEASTN

Seattle/Tacoma Intl

Fri 9/25

3:55 pm-3:25 pm

1 stop15h 30m

London Stansted

Fri 10/2

6:20 am-1:45 pm

1 stop15h 25m

$642

SeattleLondon

SEA Seattle/Tacoma Intl - LHR London Heathrow

SEALHR

Seattle/Tacoma Intl

Sat 10/3

11:08 pm-4:00 pm

2 stops32h 52m

London Heathrow

Tue 10/6

6:40 am-1:45 pm

2 stops15h 05m

$644

SeattleLondon

SEA Seattle/Tacoma Intl - LHR London Heathrow

SEALHR

Seattle/Tacoma Intl

Sat 9/19

3:55 pm-5:00 pm

2 stops17h 05m

London Heathrow

Mon 9/21

6:40 am-11:14 pm

2 stops24h 34m

$658

SeattleLondon

SEA Seattle/Tacoma Intl - LHR London Heathrow

SEALHR

Seattle/Tacoma Intl

Thu 10/8

7:00 pm-8:20 pm

1 stop17h 20m

London Heathrow

Wed 10/14

9:25 pm-5:55 pm

1 stop28h 30m

$704
Quickest round-trip

SeattleLondon

SEA Seattle/Tacoma Intl - LHR London Heathrow

SEALHR

Seattle/Tacoma Intl

Fri 10/2

7:00 pm-8:20 pm

1 stop17h 20m

London Heathrow

Sun 10/4

1:05 pm-5:55 pm

1 stop12h 50m

$704

SeattleLondon

SEA Seattle/Tacoma Intl - LHR London Heathrow

SEALHR

Seattle/Tacoma Intl

Sat 11/7

7:05 pm-11:50 am

1 stop32h 45m

London Heathrow

Tue 11/10

6:50 am-8:56 pm

2 stops22h 06m

$732

SeattleLondon

SEA Seattle/Tacoma Intl - LHR London Heathrow

SEALHR

Seattle/Tacoma Intl

Sat 11/7

8:30 am-7:10 am

3 stops38h 40m

London Heathrow

Tue 11/10

6:50 am-7:03 pm

2 stops20h 13m

$740

SeattleLondon

SEA Seattle/Tacoma Intl - LHR London Heathrow

SEALHR

Seattle/Tacoma Intl

Wed 11/11

2:50 pm-1:00 pm

1 stop14h 10m

London Heathrow

Fri 11/13

7:40 am-11:17 pm

2 stops23h 37m

$753

SeattleLondon

SEA Seattle/Tacoma Intl - LHR London Heathrow

SEALHR

Seattle/Tacoma Intl

Tue 11/10

7:00 am-4:50 pm

2 stops25h 50m

London Heathrow

Thu 11/12

2:30 pm-9:27 am

1 stop26h 57m

$768

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to the United Kingdom from

How to get the cheapest flight ticket from State of Washington to United Kingdom

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to United Kingdom?

In general, January is the cheapest month to fly from State of Washington to United Kingdom. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $659. If you aren’t able to travel to United Kingdom during the month of January, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $683.

What is the cheapest day to depart on your flight to United Kingdom?

The cheapest day to depart from State of Washington to United Kingdom is on a Wednesday when prices can be found for as low as $882. The most expensive day to fly to United Kingdom is Saturday, with ticket prices averaging around $970.

What is the cheapest time of day to depart on your flight to United Kingdom?

According to our data, the cheapest time of day to fly to United Kingdom is in the afternoon. momondo users have found flights departing from State of Washington to United Kingdom in the afternoon for as low as $912. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to United Kingdom are more costly in the evening, with an average ticket price of $940. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Washington to United Kingdom flight route?

Fly from Seattle/Tacoma Intl to London Heathrow for the best Washington - United Kingdom flight prices

How far in advance should I book a flight from Washington to the United Kingdom?

You are more likely to see cheaper flights to United Kingdom from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to United Kingdom for around $852 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United Kingdom from State of Washington for as low as $762 on momondo.

What cabin class options are available on State of Washington to United Kingdom flights?

There are 4 cabin classes available to choose from on State of Washington to United Kingdom flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on State of Washington to United Kingdom flights?

No. A direct flight is the cheapest option for a flight between State of Washington to United Kingdom.

Cheap State of Washington to United Kingdom flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to United Kingdom

Best Price Found

$374

Fastest flight time

9h 15m

Direct flights

Every day

Airports in United Kingdom

1,285 airports
The best one-way flight to United Kingdom from State of Washington in the past 72 hours is $374. The best round-trip flight deal from State of Washington to United Kingdom found on momondo in the last 72 hours is $935.
The fastest flight from State of Washington to United Kingdom takes 9h 15m
Direct flights go from State of Washington to United Kingdom every day.
There are 1,285 airports in United Kingdom. From State of Washington there are direct flights to London Heathrow (LHR).
Search flight deals

Frequently asked questions about flying from Washington to the United Kingdom

  • When did momondo last update prices for flights from Washington to United Kingdom?

    Prices for flights from Washington to United Kingdom were last updated today.

  • How many operators does momondo search for flights from Washington to United Kingdom?

  • How old do you have to be to fly from Washington to United Kingdom?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington to United Kingdom.

  • What documentation or ID do you need to fly to United Kingdom?

    The necessary travel and health documents for your United Kingdom trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from State of Washington to United Kingdom?

Best airlines flying from State of Washington to United Kingdom

Compare and see reviews for airlines that fly from State of Washington to United Kingdom with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom $488Free CancellationRating
6.9
727 reviews
Search Icelandair flights
Aer LingusPriceFrom $500Free CancellationRating
7.3
1,697 reviews
Search Aer Lingus flights
Virgin AtlanticPriceFrom $528Free CancellationRating
7.5
694 reviews
Search Virgin Atlantic flights
British AirwaysPriceFrom $533Free CancellationRating
6.7
8,159 reviews
Search British Airways flights
United AirlinesPriceFrom $559Free CancellationRating
7.4
10,111 reviews
Search United Airlines flights
FinnairPriceFrom $560Free CancellationRating
7.6
1,429 reviews
Search Finnair flights
DeltaPriceFrom $563Free CancellationRating
7.8
8,505 reviews
Search Delta flights
Air FrancePriceFrom $565Free CancellationRating
7.5
1,641 reviews
Search Air France flights
American AirlinesPriceFrom $568Free CancellationRating
7.1
11,911 reviews
Search American Airlines flights
Scandinavian AirlinesPriceFrom $580Free CancellationRating
7.4
1,947 reviews
Search Scandinavian Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Washington to United Kingdom?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Washington to United Kingdom. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Washington to United Kingdom with flexible booking policies on momondo?

Yes. All flights to United Kingdom from Washington on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Washington to United Kingdom?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Washington to United Kingdom.

I’m not ready to book a flight from Washington to United Kingdom right now. Can momondo alert me if prices change?

If you are simply researching potential flights to United Kingdom, momondo offers a useful price alert feature which will track prices for flights to United Kingdom from Washington and alert you when they change.

An easier way to manage your United Kingdom trip

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Find better results for your trip to the United Kingdom

Popular cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo
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Flights to Leedsfrom $623