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Cheap flights from Seattle to the United Kingdom from £241

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to the United Kingdom departing on 23/11. 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 return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
14:35 - 20:20SEA-GLA
21h 45m2 stops
Multiple Airlines Logo
08:25 - 17:00GLA-SEA
16h 35m2 stops
£352Multiple Airlines
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Tue, 2 Dec - Tue, 9 Dec
Icelandair Logo
14:35 - 09:55SEA-GLA
11h 20m1 stop
Icelandair Logo
12:35 - 18:00GLA-SEA
12h 25m1 stop
£355Icelandair
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Sun, 22 Feb - Sun, 8 Mar
Virgin Atlantic Logo
19:20 - 12:50SEA-LHR
9h 30mdirect
Virgin Atlantic Logo
06:20 - 11:25LHR-SEA
13h 05m1 stop
£412Virgin Atlantic
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Tue, 11 Nov - Tue, 25 Nov
British Airways Logo
18:50 - 18:35SEA-EDI
15h 45m1 stop
British Airways Logo
08:40 - 16:55EDI-SEA
16h 15m1 stop
£417British Airways
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Sun, 25 Jan - Tue, 3 Feb
Virgin Atlantic Logo
19:20 - 12:50SEA-LHR
9h 30mdirect
Virgin Atlantic Logo
14:45 - 16:50LHR-SEA
10h 05mdirect
£418Virgin Atlantic
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Tue, 11 Nov - Tue, 25 Nov
British Airways Logo
18:50 - 15:15SEA-EDI
12h 25m1 stop
British Airways Logo
09:30 - 21:59EDI-SEA
20h 29m2 stops
£433British Airways
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Mon, 24 Nov - Wed, 3 Dec
KLM Logo
15:00 - 16:35SEA-LCY
17h 35m1 stop
KLM Logo
10:00 - 11:45LCY-SEA
33h 45m1 stop
£477KLM
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Tue, 18 Nov - Tue, 25 Nov
KLM Logo
07:20 - 09:55SEA-GLA
18h 35m2 stops
KLM Logo
06:05 - 11:40GLA-SEA
13h 35m1 stop
£504KLM
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Sat, 7 Feb - Sat, 14 Feb
Aer Lingus Logo
00:59 - 07:35SEA-MAN
22h 36m2 stops
Aer Lingus Logo
13:55 - 18:20MAN-SEA
12h 25m1 stop
£606Aer Lingus
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Sun, 16 Nov - Mon, 24 Nov
Aer Lingus Logo
00:38 - 08:30SEA-NCL
23h 52m2 stops
Aer Lingus Logo
09:00 - 18:20NCL-SEA
17h 20m1 stop
£619Aer Lingus
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Sat, 6 Dec - Mon, 15 Dec

Lufthansa flights from Seattle to United Kingdom

Our best Lufthansa deals on Seattle to United Kingdom flight tickets
Lufthansa
28 Oct
SEA15:40Seattle/Tacoma Intl
13h 10m
1 stop
LHR11:50London Heathrow
21 Nov
LHR07:40London Heathrow
13h 40m
1 stop
SEA13:20Seattle/Tacoma Intl
£421
Find similar
Lufthansa
3 Dec
SEA15:10Seattle/Tacoma Intl
13h 50m
1 stop
LHR13:00London Heathrow
10 Dec
LHR07:40London Heathrow
13h 40m
1 stop
SEA13:20Seattle/Tacoma Intl
£427
Find similar
Lufthansa
26 Nov
SEA10:05Seattle/Tacoma Intl
17h 45m
1 stop
LHR11:50London Heathrow
5 Dec
LHR07:40London Heathrow
19h 36m
2 stops
SEA19:16Seattle/Tacoma Intl
£430
Find similar

Air France flights from Seattle to United Kingdom

Our best Air France deals on Seattle to United Kingdom flight tickets
Air France
4 Nov
SEA19:20Seattle/Tacoma Intl
9h 30m
LHR12:50London Heathrow
12 Nov
LHR06:20London Heathrow
15h 00m
1 stop
SEA13:20Seattle/Tacoma Intl
£433
Find similar
Air France
7 Jan
SEA16:45Seattle/Tacoma Intl
9h 45m
LHR10:30London Heathrow
15 Jan
LHR06:20London Heathrow
13h 05m
1 stop
SEA11:25Seattle/Tacoma Intl
£440
Find similar
Air France
20 Jan
SEA09:40Seattle/Tacoma Intl
17h 00m
2 stops
EDI10:40Edinburgh Turnhouse
3 Feb
EDI06:00Edinburgh Turnhouse
18h 19m
2 stops
SEA16:19Seattle/Tacoma Intl
£462
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momondo Fare Finder

 
Customise your flight search to find flights from Seattle 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 279,928 searches. Data last updated 24 October 2025.
Use the filters below to find and compare flights from Seattle to the United Kingdom that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleGlasgow

SEA - GLA

SEAGLA

Seattle/Tacoma Intl

Tue 2/12

14:35-20:20

2 stops21h 45m

Glasgow Intl

Tue 9/12

08:25-17:00

2 stops16h 35m

£352

SeattleGlasgow

SEA - GLA

SEAGLA

Seattle/Tacoma Intl

Sun 22/2

14:35-09:55

1 stop11h 20m

Glasgow Intl

Sun 8/3

12:35-18:00

1 stop12h 25m

£355

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 11/11

19:20-12:50

Nonstop9h 30m

London Heathrow

Tue 25/11

06:20-11:25

1 stop13h 05m

£412

SeattleEdinburgh

SEA - EDI

SEAEDI

Seattle/Tacoma Intl

Sun 25/1

18:50-18:35

1 stop15h 45m

Edinburgh Turnhouse

Tue 3/2

08:40-16:55

1 stop16h 15m

£417

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 11/11

19:20-12:50

Nonstop9h 30m

London Heathrow

Tue 25/11

14:45-16:50

Nonstop10h 05m

£418

SeattleEdinburgh

SEA - EDI

SEAEDI

Seattle/Tacoma Intl

Mon 24/11

18:50-15:15

1 stop12h 25m

Edinburgh Turnhouse

Wed 3/12

09:30-21:59

2 stops20h 29m

£433

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 18/11

15:00-16:35

1 stop17h 35m

London City

Tue 25/11

10:00-11:45

1 stop33h 45m

£477

SeattleGlasgow

SEA - GLA

SEAGLA

Seattle/Tacoma Intl

Sat 7/2

07:20-09:55

2 stops18h 35m

Glasgow Intl

Sat 14/2

06:05-11:40

1 stop13h 35m

£504

SeattleManchester

SEA - MAN

SEAMAN

Seattle/Tacoma Intl

Sun 16/11

00:59-07:35

2 stops22h 36m

Manchester

Mon 24/11

13:55-18:20

1 stop12h 25m

£606

SeattleNewcastle upon Tyne

SEA - NCL

SEANCL

Seattle/Tacoma Intl

Sat 6/12

00:38-08:30

2 stops23h 52m

Newcastle upon Tyne

Mon 15/12

09:00-18:20

1 stop17h 20m

£619

Flights are sorted by cheapest return 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 Seattle 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?

The cheapest month to fly to United Kingdom from Seattle is in October. Flight prices, which tend to average around £497, are often lower during this time because this is during the off-season. If you are unable to visit United Kingdom during the month of October, then departing from Seattle during the month August is also very affordable. Most momondo users find prices during this month for around £508.

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

The cheapest day to depart from Seattle to United Kingdom is on a Tuesday. Travellers who choose to depart for United Kingdom on a Tuesday will often find tickets for as low as £515. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from Seattle to United Kingdom for around £662.

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

The cheapest time of day to fly to United Kingdom is at midday when flights can be purchased for as low as £587. Try not to purchase tickets in the morning because they tend to be around £1,026. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Seattle/Tacoma Intl to United Kingdom flight route?

Fly from Seattle/Tacoma Intl to London Heathrow for the best Seattle/Tacoma Intl - 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 Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to United Kingdom for around £601 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United Kingdom from Seattle for as low as £529 on momondo.

What cabin class options are available on Seattle/Tacoma Intl to United Kingdom flights?

There are 3 cabin classes available to choose from on Seattle/Tacoma Intl 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 Seattle to United Kingdom flights?

You could potentially save up to 26% on your flight if you consider stops on a Seattle to United Kingdom flight.

Cheap Seattle to United Kingdom flight deals and tips

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

Best price found

£432

Fastest flight time

9h 25m

Direct flights

Every day

Airports in United Kingdom

1 airport
The best one-way flight to United Kingdom from Seattle in the past 72 hours is £432. The best return flight deal from Seattle to United Kingdom found on momondo in the last 72 hours is £500.
The fastest flight from Seattle to United Kingdom takes 9h 25m
Direct flights go from Seattle to United Kingdom every day.
There is 1 airport near United Kingdom: London Heathrow (LHR)
Search flight deals

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to United Kingdom?

    Prices for flights from Seattle/Tacoma Intl Airport to United Kingdom were last updated today.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to United Kingdom?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport 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 Seattle/Tacoma Intl Airport to United Kingdom.

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

    The required travel and health documents for your United Kingdom trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at United Kingdom. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Seattle to United Kingdom?

Best airlines flying from Seattle to United Kingdom

Compare and see reviews for airlines that fly from Seattle to United Kingdom with momondo
Airline
Rating
Free Cancellation
Price
Aer LingusPriceFrom £351Free CancellationRating
7.2
1,353 reviews
Search Aer Lingus flights
British AirwaysPriceFrom £355Free CancellationRating
6.7
7,469 reviews
Search British Airways flights
Virgin AtlanticPriceFrom £370Free CancellationRating
7.5
670 reviews
Search Virgin Atlantic flights
IcelandairPriceFrom £399Free CancellationRating
7.1
561 reviews
Search Icelandair flights

Why use momondo?

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

Finding the right flight to United Kingdom from Seattle is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to United Kingdom quick and easy, saving you time and money.

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

Yes. momondo allows you to filter the results for Seattle to United Kingdom flights to just show those with flexible booking policies.

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

Once you have performed a search for Seattle to United Kingdom flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes. momondo can track prices for Seattle to United Kingdom flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your United Kingdom trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
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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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