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Cheap flights from Washington to the United Kingdom from $224

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 12/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

Logo
8:05 pm - 5:50 pmSEA-STN
13h 45m1 stop
Logo
6:30 am - 6:20 pmSTN-SEA
19h 50m1 stop
$460
Find Deal
mié., nov. 12 - mié., nov. 19
Virgin Atlantic Logo
8:25 pm - 2:15 pmSEA-LHR
9h 50mnonstop
Virgin Atlantic Logo
11:30 am - 5:40 pmLHR-SEA
14h 10m1 stop
$462Virgin Atlantic
Find Deal
dom., ago. 17 - mar., sep. 2
United Airlines Logo
5:05 am - 9:40 amSEA-LHR
20h 35m1 stop
United Airlines Logo
6:35 am - 1:20 pmLHR-SEA
14h 45m1 stop
$468United Airlines
Find Deal
mar., nov. 4 - mié., nov. 19
Aer Lingus Logo
8:05 pm - 7:50 pmSEA-LHR
15h 45m1 stop
Aer Lingus Logo
8:50 am - 6:20 pmLHR-SEA
17h 30m1 stop
$469Aer Lingus
Find Deal
mié., nov. 19 - mié., nov. 26
Aer Lingus Logo
7:35 pm - 6:55 pmSEA-LHR
15h 20m1 stop
Aer Lingus Logo
8:50 am - 5:50 pmLHR-SEA
17h 00m1 stop
$471Aer Lingus
Find Deal
mar., oct. 14 - vie., oct. 24
Air Canada Logo
7:15 am - 9:35 amSEA-LHR
18h 20m1 stop
Air Canada Logo
9:30 am - 7:31 pmLHR-SEA
18h 01m1 stop
$482Air Canada
Find Deal
mar., sep. 9 - mar., sep. 30
Icelandair Logo
2:35 pm - 10:55 amSEA-LGW
12h 20m1 stop
Icelandair Logo
11:55 am - 5:00 pmLGW-SEA
13h 05m1 stop
$485Icelandair
Find Deal
mar., nov. 4 - mié., nov. 19
Icelandair Logo
7:00 pm - 2:40 pmSEA-LGW
11h 40m1 stop
Icelandair Logo
3:40 pm - 5:50 pmLGW-SEA
34h 10m1 stop
$487Icelandair
Find Deal
mié., oct. 1 - mié., oct. 8
United Airlines Logo
5:00 am - 11:35 amSEA-LHR
22h 35m1 stop
United Airlines Logo
1:40 pm - 10:52 pmLHR-SEA
17h 12m1 stop
$491United Airlines
Find Deal
dom., ago. 17 - mar., sep. 2
Air Canada Logo
10:00 am - 1:20 pmSEA-LHR
19h 20m1 stop
Air Canada Logo
8:40 am - 6:36 pmLHR-SEA
17h 56m2 stops
$495Air Canada
Find Deal
mié., oct. 8 - jue., oct. 16

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 9
SEA7:15 amSeattle/Tacoma Intl
18h 20m
1 stop
LHR9:35 amLondon Heathrow
Sep 30
LHR9:30 amLondon Heathrow
18h 01m
1 stop
SEA7:31 pmSeattle/Tacoma Intl
$482
Find similar
Air Canada
Oct 8
SEA10:00 amSeattle/Tacoma Intl
19h 20m
1 stop
LHR1:20 pmLondon Heathrow
Oct 16
LHR8:40 amLondon Heathrow
17h 56m
2 stops
SEA6:36 pmSeattle/Tacoma Intl
$495
Find similar
Air Canada
Nov 9
SEA10:05 amSeattle/Tacoma Intl
16h 05m
2 stops
LHR10:10 amLondon Heathrow
Nov 19
LHR3:00 pmLondon Heathrow
15h 06m
2 stops
SEA10:06 pmSeattle/Tacoma Intl
$515
Find similar

Aer Lingus flights from State of Washington to United Kingdom

Our best Aer Lingus deals on State of Washington to United Kingdom flight tickets
Aer Lingus
Nov 19
SEA8:05 pmSeattle/Tacoma Intl
15h 45m
1 stop
LHR7:50 pmLondon Heathrow
Nov 26
LHR8:50 amLondon Heathrow
17h 30m
1 stop
SEA6:20 pmSeattle/Tacoma Intl
$469
Find similar
Aer Lingus
Oct 14
SEA7:35 pmSeattle/Tacoma Intl
15h 20m
1 stop
LHR6:55 pmLondon Heathrow
Oct 24
LHR8:50 amLondon Heathrow
17h 00m
1 stop
SEA5:50 pmSeattle/Tacoma Intl
$471
Find similar
Aer Lingus
Oct 7
SEA7:35 pmSeattle/Tacoma Intl
12h 20m
1 stop
LHR3:55 pmLondon Heathrow
Oct 22
LHR9:50 amLondon Heathrow
16h 00m
1 stop
SEA5:50 pmSeattle/Tacoma Intl
$472
Find similar

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 agosto 7, 2025.
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

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

mié. 11/12

8:05 pm-5:50 pm

1 stop13h 45m

London Stansted

mié. 11/19

6:30 am-6:20 pm

1 stop19h 50m

$460

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

dom. 8/17

8:25 pm-2:15 pm

Nonstop9h 50m

London Heathrow

mar. 9/2

11:30 am-5:40 pm

1 stop14h 10m

$462

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

mar. 11/4

5:05 am-9:40 am

1 stop20h 35m

London Heathrow

mié. 11/19

6:35 am-1:20 pm

1 stop14h 45m

$468

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

mié. 11/19

8:05 pm-7:50 pm

1 stop15h 45m

London Heathrow

mié. 11/26

8:50 am-6:20 pm

1 stop17h 30m

$469

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

mar. 10/14

7:35 pm-6:55 pm

1 stop15h 20m

London Heathrow

vie. 10/24

8:50 am-5:50 pm

1 stop17h 00m

$471

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

mar. 9/9

7:15 am-9:35 am

1 stop18h 20m

London Heathrow

mar. 9/30

9:30 am-7:31 pm

1 stop18h 01m

$482

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

mar. 11/4

2:35 pm-10:55 am

1 stop12h 20m

London Gatwick

mié. 11/19

11:55 am-5:00 pm

1 stop13h 05m

$485

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

mié. 10/1

7:00 pm-2:40 pm

1 stop11h 40m

London Gatwick

mié. 10/8

3:40 pm-5:50 pm

1 stop34h 10m

$487

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

dom. 8/17

5:00 am-11:35 am

1 stop22h 35m

London Heathrow

mar. 9/2

1:40 pm-10:52 pm

1 stop17h 12m

$491

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

mié. 10/8

10:00 am-1:20 pm

1 stop19h 20m

London Heathrow

jue. 10/16

8:40 am-6:36 pm

2 stops17h 56m

$495

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, October 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 $664. If you aren’t able to travel to United Kingdom during the month of October, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $674.

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 Tuesday when prices can be found for as low as $810. The most expensive day to fly to United Kingdom is Saturday, with ticket prices averaging around $931.

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 evening. momondo users have found flights departing from State of Washington to United Kingdom in the evening for as low as $846. 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 morning, with an average ticket price of $980. Departure times in the morning 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 to 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 $804 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 $706 on momondo.

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

There are 4 cabin classes available to choose from on 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?

You could potentially save up to 58% on your flight if you consider stops on a State of Washington to United Kingdom flight.

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

$224

Fastest flight time

9h 20m

Direct flights

Every day

Airports in United Kingdom

7 airports
The best one-way flight to United Kingdom from State of Washington in the past 72 hours is $224. The best round-trip flight deal from State of Washington to United Kingdom found on momondo in the last 72 hours is $460.
The fastest flight from State of Washington to United Kingdom takes 9h 20m
Direct flights go from State of Washington to United Kingdom every day.
There are 7 airports near United Kingdom: London City (LCY), London Heathrow (LHR), London Luton (LTN), Edinburgh Turnhouse (EDI), London Stansted (STN), London Gatwick (LGW), Glasgow Intl (GLA)
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  • 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
JetBluePriceFrom $213Free CancellationRating
7.2
2,915 reviews
Search JetBlue flights
LufthansaPriceFrom $378Free CancellationRating
6.8
7,296 reviews
Search Lufthansa flights
IcelandairPriceFrom $479Free CancellationRating
7.0
524 reviews
Search Icelandair flights
Scandinavian AirlinesPriceFrom $532Free CancellationRating
7.4
1,465 reviews
Search Scandinavian Airlines flights
Air FrancePriceFrom $545Free CancellationRating
7.4
1,465 reviews
Search Air France flights
United AirlinesPriceFrom $547Free CancellationRating
7.4
8,917 reviews
Search United Airlines flights
FinnairPriceFrom $556Free CancellationRating
7.6
1,319 reviews
Search Finnair flights
American AirlinesPriceFrom $568Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Aer LingusPriceFrom $572Free CancellationRating
7.1
1,202 reviews
Search Aer Lingus flights
British AirwaysPriceFrom $573Free CancellationRating
6.6
7,251 reviews
Search British Airways 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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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 $469