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Cheap flights from Seattle to the United Kingdom from £155

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 1/4. 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.
Icelandair Logo
19:00 - 13:25
SEA
-
GLA
10h 25m
1 stop
Icelandair Logo
14:20 - 17:55
GLA
-
SEA
11h 35m
1 stop
£360Icelandair
Wed, 1 Apr - Sun, 5 Apr
Multiple Airlines Logo
15:40 - 00:55
SEA
-
MAN
25h 15m
2 stops
Multiple Airlines Logo
08:00 - 20:40
MAN
-
SEA
20h 40m
2 stops
£360Multiple Airlines
Wed, 22 Apr - Mon, 27 Apr
British Airways Logo
18:50 - 18:35
SEA
-
EDI
15h 45m
1 stop
British Airways Logo
09:25 - 17:55
EDI
-
SEA
15h 30m
1 stop
£442British Airways
Wed, 4 Mar - Thu, 12 Mar
British Airways Logo
13:37 - 15:10
SEA
-
EDI
17h 33m
2 stops
British Airways Logo
18:55 - 17:55
EDI
-
SEA
30h 00m
1 stop
£443British Airways
Wed, 25 Feb - Wed, 11 Mar
Lufthansa Logo
14:00 - 12:00
SEA
-
EDI
14h 00m
1 stop
Lufthansa Logo
06:05 - 12:10
EDI
-
SEA
14h 05m
1 stop
£443Lufthansa
Mon, 23 Feb - Mon, 2 Mar
Virgin Atlantic Logo
15:05 - 18:25
SEA
-
LCY
19h 20m
1 stop
Virgin Atlantic Logo
17:50 - 11:35
LCY
-
SEA
25h 45m
1 stop
£475Virgin Atlantic
Mon, 23 Feb - Mon, 2 Mar
Virgin Atlantic Logo
15:05 - 17:20
SEA
-
LCY
18h 15m
1 stop
Virgin Atlantic Logo
17:05 - 11:35
LCY
-
SEA
26h 30m
1 stop
£477Virgin Atlantic
Tue, 24 Feb - Tue, 3 Mar
KLM Logo
13:45 - 09:30
SEA
-
LCY
11h 45m
1 stop
KLM Logo
10:00 - 16:35
LCY
-
SEA
14h 35m
1 stop
£485KLM
Tue, 21 Jul - Wed, 16 Sep
KLM Logo
13:45 - 09:30
SEA
-
LCY
11h 45m
1 stop
KLM Logo
09:20 - 16:30
LCY
-
SEA
15h 10m
1 stop
£487KLM
Mon, 6 Apr - Thu, 7 May
Lufthansa Logo
16:10 - 17:00
SEA
-
BHX
17h 50m
1 stop
Lufthansa Logo
05:55 - 12:20
BHX
-
SEA
14h 25m
1 stop
£487Lufthansa
Wed, 11 Mar - Tue, 14 Apr

Lufthansa flights from Seattle to United Kingdom

Our best Lufthansa deals on Seattle to United Kingdom flight tickets
Lufthansa
26 Feb
SEA09:55Seattle/Tacoma Intl
16h 15m
2 stops
LHR10:10London Heathrow
8 Mar
LHR07:40London Heathrow
18h 36m
2 stops
SEA18:16Seattle/Tacoma Intl
£427
Lufthansa
25 Feb
SEA09:55Seattle/Tacoma Intl
16h 15m
2 stops
LHR10:10London Heathrow
4 Mar
LHR06:35London Heathrow
14h 45m
1 stop
SEA13:20Seattle/Tacoma Intl
£430
Lufthansa
25 Mar
SEA16:10Seattle/Tacoma Intl
23h 45m
1 stop
LHR22:55London Heathrow
1 Apr
LHR06:55London Heathrow
18h 04m
1 stop
SEA16:59Seattle/Tacoma Intl
£431

Icelandair flights from Seattle to United Kingdom

Our best Icelandair deals on Seattle to United Kingdom flight tickets
Icelandair
1 Apr
SEA19:00Seattle/Tacoma Intl
10h 25m
1 stop
GLA13:25Glasgow Intl
5 Apr
GLA14:20Glasgow Intl
11h 35m
1 stop
SEA17:55Seattle/Tacoma Intl
£360
Icelandair
30 Mar
SEA19:00Seattle/Tacoma Intl
10h 25m
1 stop
GLA13:25Glasgow Intl
5 Apr
GLA14:20Glasgow Intl
11h 35m
1 stop
SEA17:55Seattle/Tacoma Intl
£371
Icelandair
23 Apr
SEA19:00Seattle/Tacoma Intl
32h 40m
1 stop
MAN11:40Manchester
28 Apr
MAN13:05Manchester
12h 50m
1 stop
SEA17:55Seattle/Tacoma Intl
£376

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 28 January 2026.
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

Wed 1/4

19:00-13:25

1 stop10h 25m

Glasgow Intl

Sun 5/4

14:20-17:55

1 stop11h 35m

£360

SeattleManchester

SEA - MAN

SEAMAN

Seattle/Tacoma Intl

Wed 22/4

15:40-00:55

2 stops25h 15m

Manchester

Mon 27/4

08:00-20:40

2 stops20h 40m

£360

SeattleEdinburgh

SEA - EDI

SEAEDI

Seattle/Tacoma Intl

Wed 4/3

18:50-18:35

1 stop15h 45m

Edinburgh Turnhouse

Thu 12/3

09:25-17:55

1 stop15h 30m

£442

SeattleEdinburgh

SEA - EDI

SEAEDI

Seattle/Tacoma Intl

Wed 25/2

13:37-15:10

2 stops17h 33m

Edinburgh Turnhouse

Wed 11/3

18:55-17:55

1 stop30h 00m

£443

SeattleEdinburgh

SEA - EDI

SEAEDI

Seattle/Tacoma Intl

Mon 23/2

14:00-12:00

1 stop14h 00m

Edinburgh Turnhouse

Mon 2/3

06:05-12:10

1 stop14h 05m

£443

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 23/2

15:05-18:25

1 stop19h 20m

London City

Mon 2/3

17:50-11:35

1 stop25h 45m

£475

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 24/2

15:05-17:20

1 stop18h 15m

London City

Tue 3/3

17:05-11:35

1 stop26h 30m

£477

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 21/7

13:45-09:30

1 stop11h 45m

London City

Wed 16/9

10:00-16:35

1 stop14h 35m

£485

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 6/4

13:45-09:30

1 stop11h 45m

London City

Thu 7/5

09:20-16:30

1 stop15h 10m

£487

SeattleBirmingham

SEA - BHX

SEABHX

Seattle/Tacoma Intl

Wed 11/3

16:10-17:00

1 stop17h 50m

Birmingham

Tue 14/4

05:55-12:20

1 stop14h 25m

£487

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 £471, 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 January is also very affordable. Most momondo users find prices during this month for around £473.

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 £500. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Seattle to United Kingdom for around £639.

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 £508. Try not to purchase tickets in the afternoon because they tend to be around £592. 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 £570 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 £492 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 45% 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

£338

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 Seattle in the past 72 hours is £338. The best return flight deal from Seattle to United Kingdom found on momondo in the last 72 hours is £507.
The fastest flight from Seattle to United Kingdom takes 9h 15m
Direct flights go from Seattle to United Kingdom every day.
There are 1,286 airports in United Kingdom. From Seattle there are direct flights to 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
British AirwaysPriceFrom £345Free CancellationRating
6.7
7,704 reviews
Search British Airways flights
Virgin AtlanticPriceFrom £360Free CancellationRating
7.5
678 reviews
Search Virgin Atlantic flights
IcelandairPriceFrom £387Free CancellationRating
7.1
603 reviews
Search Icelandair flights
Aer LingusPriceFrom £490Free CancellationRating
7.2
1,442 reviews
Search Aer Lingus 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

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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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