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Cheap flights from Washington to the United Kingdom from $210

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 4/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Icelandair Logo
2:35 pm - 9:55 am
SEA
-
GLA
11h 20m1 stop
Icelandair Logo
12:35 pm - 5:00 pm
GLA
-
SEA
12h 25m1 stop
$492Icelandair
Sat, Jan 24 - Tue, Feb 17
Icelandair Logo
2:35 pm - 9:55 am
SEA
-
GLA
11h 20m1 stop
Icelandair Logo
12:35 pm - 5:00 pm
GLA
-
SEA
12h 25m1 stop
$504Icelandair
Tue, Feb 3 - Tue, Feb 17
Multiple Airlines Logo
2:35 pm - 10:50 pm
SEA
-
EDI
24h 15m2 stops
Multiple Airlines Logo
6:00 am - 5:00 pm
EDI
-
SEA
19h 00m2 stops
$555Multiple Airlines
Fri, Jan 23 - Fri, Jan 30
Multiple Airlines Logo
2:35 pm - 7:30 pm
SEA
-
LGW
20h 55m2 stops
Multiple Airlines Logo
7:30 pm - 5:00 pm
LGW
-
SEA
29h 30m3 stops
$578Multiple Airlines
Wed, Jan 21 - Wed, Jan 28
British Airways Logo
7:50 pm - 3:15 pm
SEA
-
EDI
12h 25m1 stop
British Airways Logo
6:05 am - 12:30 pm
EDI
-
SEA
13h 25m1 stop
$588British Airways
Tue, Mar 10 - Tue, Mar 24
British Airways Logo
1:35 pm - 10:05 am
SEA
-
EDI
12h 30m1 stop
British Airways Logo
6:05 am - 11:30 am
EDI
-
SEA
13h 25m1 stop
$598British Airways
Fri, Jan 23 - Fri, Jan 30
Lufthansa Logo
8:00 am - 10:35 am
SEA
-
EDI
18h 35m1 stop
Lufthansa Logo
9:00 am - 7:18 pm
EDI
-
SEA
18h 18m2 stops
$602Lufthansa
Mon, Mar 30 - Fri, Apr 10
Lufthansa Logo
9:50 am - 10:10 am
PDX
-
LHR
16h 20m2 stops
Lufthansa Logo
6:40 pm - 10:40 pm
LHR
-
PDX
36h 00m2 stops
$641Lufthansa
Tue, Feb 10 - Wed, Feb 25
American Airlines Logo
6:00 am - 6:50 am
PDX
-
LHR
16h 50m1 stop
American Airlines Logo
1:45 pm - 3:55 pm
LHR
-
PDX
10h 10mnonstop
$644American Airlines
Mon, Feb 9 - Wed, Feb 25
American Airlines Logo
12:02 pm - 11:40 am
PDX
-
LHR
15h 38m1 stop
American Airlines Logo
1:45 pm - 3:55 pm
LHR
-
PDX
10h 10mnonstop
$645American Airlines
Tue, Feb 24 - Fri, Mar 6

Delta flights from State of Washington to United Kingdom

Our best Delta deals on State of Washington to United Kingdom flight tickets
Delta
Jan 31
SEA6:25 pmSeattle/Tacoma Intl
9h 30m
LHR11:55 amLondon Heathrow
Feb 25
LHR6:30 amLondon Heathrow
13h 10m
1 stop
SEA11:40 amSeattle/Tacoma Intl
$616
Find similar
Delta
Feb 1
SEA7:10 amSeattle/Tacoma Intl
15h 10m
1 stop
LHR6:20 amLondon Heathrow
Feb 12
LHR6:30 amLondon Heathrow
13h 10m
1 stop
SEA11:40 amSeattle/Tacoma Intl
$621
Find similar
Delta
Mar 2
SEA6:10 amSeattle/Tacoma Intl
20h 30m
2 stops
EDI10:40 amEdinburgh Turnhouse
Mar 10
EDI9:30 amEdinburgh Turnhouse
34h 05m
1 stop
SEA12:35 pmSeattle/Tacoma Intl
$624
Find similar

United Airlines flights from State of Washington to United Kingdom

Our best United Airlines deals on State of Washington to United Kingdom flight tickets
United Airlines
Jan 31
SEA8:40 amSeattle/Tacoma Intl
16h 30m
2 stops
LHR9:10 amLondon Heathrow
Feb 25
LHR6:35 amLondon Heathrow
14h 45m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$620
Find similar
United Airlines
Jan 26
SEA7:30 pmSeattle/Tacoma Intl
28h 25m
3 stops
EDI7:55 amEdinburgh Turnhouse
Feb 2
EDI9:25 amEdinburgh Turnhouse
19h 32m
2 stops
SEA8:57 pmSeattle/Tacoma Intl
$621
Find similar
United Airlines
Jan 4
SEA8:00 pmSeattle/Tacoma Intl
31h 50m
1 stop
LHR11:50 amLondon Heathrow
Jan 16
LHR1:00 pmLondon Heathrow
30h 32m
2 stops
SEA11:32 amSeattle/Tacoma Intl
$838
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 December 28, 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

SeattleGlasgow

SEA - GLA

SEAGLA

Seattle/Tacoma Intl

Sat 1/24

2:35 pm-9:55 am

1 stop11h 20m

Glasgow Intl

Tue 2/17

12:35 pm-5:00 pm

1 stop12h 25m

$492

SeattleGlasgow

SEA - GLA

SEAGLA

Seattle/Tacoma Intl

Tue 2/3

2:35 pm-9:55 am

1 stop11h 20m

Glasgow Intl

Tue 2/17

12:35 pm-5:00 pm

1 stop12h 25m

$504

SeattleEdinburgh

SEA - EDI

SEAEDI

Seattle/Tacoma Intl

Fri 1/23

2:35 pm-10:50 pm

2 stops24h 15m

Edinburgh Turnhouse

Fri 1/30

6:00 am-5:00 pm

2 stops19h 00m

$555

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 1/21

2:35 pm-7:30 pm

2 stops20h 55m

London Gatwick

Wed 1/28

7:30 pm-5:00 pm

3 stops29h 30m

$578

SeattleEdinburgh

SEA - EDI

SEAEDI

Seattle/Tacoma Intl

Tue 3/10

7:50 pm-3:15 pm

1 stop12h 25m

Edinburgh Turnhouse

Tue 3/24

6:05 am-12:30 pm

1 stop13h 25m

$588

SeattleEdinburgh

SEA - EDI

SEAEDI

Seattle/Tacoma Intl

Fri 1/23

1:35 pm-10:05 am

1 stop12h 30m

Edinburgh Turnhouse

Fri 1/30

6:05 am-11:30 am

1 stop13h 25m

$598

SeattleEdinburgh

SEA - EDI

SEAEDI

Seattle/Tacoma Intl

Mon 3/30

8:00 am-10:35 am

1 stop18h 35m

Edinburgh Turnhouse

Fri 4/10

9:00 am-7:18 pm

2 stops18h 18m

$602

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 2/10

9:50 am-10:10 am

2 stops16h 20m

London Heathrow

Wed 2/25

6:40 pm-10:40 pm

2 stops36h 00m

$641

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 2/9

6:00 am-6:50 am

1 stop16h 50m

London Heathrow

Wed 2/25

1:45 pm-3:55 pm

Nonstop10h 10m

$644

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 2/24

12:02 pm-11:40 am

1 stop15h 38m

London Heathrow

Fri 3/6

1:45 pm-3:55 pm

Nonstop10h 10m

$645

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, November 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 $643. If you aren’t able to travel to United Kingdom during the month of November, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $647.

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 $785. The most expensive day to fly to United Kingdom is Friday, with ticket prices averaging around $882.

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 $831. 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 $794 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 $690 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 29% 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

$366

Fastest flight time

9h 15m

Direct flights

Every day

Airports in United Kingdom

1,286 airports
The best one-way flight to United Kingdom from State of Washington in the past 72 hours is $366. The best round-trip flight deal from State of Washington to United Kingdom found on momondo in the last 72 hours is $631.
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 1,286 airports in United Kingdom. From State of Washington there are direct flights to London Heathrow (LHR).
Search flight deals

  • 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
2,901 reviews
Search JetBlue flights
Scandinavian AirlinesPriceFrom $465Free CancellationRating
7.4
1,630 reviews
Search Scandinavian Airlines flights
IcelandairPriceFrom $481Free CancellationRating
7.0
592 reviews
Search Icelandair flights
Aer LingusPriceFrom $500Free CancellationRating
7.2
1,413 reviews
Search Aer Lingus flights
American AirlinesPriceFrom $517Free CancellationRating
7.2
11,071 reviews
Search American Airlines flights
Air FrancePriceFrom $532Free CancellationRating
7.4
1,515 reviews
Search Air France flights
British AirwaysPriceFrom $544Free CancellationRating
6.7
7,616 reviews
Search British Airways flights
United AirlinesPriceFrom $547Free CancellationRating
7.4
9,114 reviews
Search United Airlines flights
Virgin AtlanticPriceFrom $552Free CancellationRating
7.5
677 reviews
Search Virgin Atlantic flights
Alaska AirlinesPriceFrom $553Free CancellationRating
8.0
11,554 reviews
Search Alaska 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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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Popular cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo
Flights to Londonfrom $344
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Flights to Bristolfrom $450
Flights to Invernessfrom $401
Flights to Liverpoolfrom $444
Flights to Aberdeenfrom $496
Flights to Leedsfrom $459