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Cheap flights from Seattle to London from £271

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 London departing on 7/9. 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 Seattle to London

Cheap return flights

Enter your travel dates to find the best prices.
Turkish Airlines Logo
12:35 - 22:10
SEA
-
STN
25h 35m
1 stop
Turkish Airlines Logo
06:55 - 17:20
STN
-
SEA
18h 25m
1 stop
£659Turkish Airlines
Mon, 7 Sep - Tue, 6 Oct
Multiple Airlines Logo
15:40 - 21:10
SEA
-
STN
21h 30m
2 stops
Multiple Airlines Logo
06:30 - 09:40
STN
-
SEA
35h 10m
3 stops
£660Multiple Airlines
Fri, 11 Sep - Mon, 28 Sep
Multiple Airlines Logo
15:40 - 21:10
SEA
-
STN
21h 30m
2 stops
Multiple Airlines Logo
06:30 - 09:40
STN
-
SEA
35h 10m
3 stops
£676Multiple Airlines
Fri, 11 Sep - Mon, 21 Sep
Multiple Airlines Logo
15:40 - 19:30
SEA
-
STN
19h 50m
2 stops
Multiple Airlines Logo
22:25 - 21:00
STN
-
SEA
30h 35m
3 stops
£678Multiple Airlines
Fri, 17 Jul - Mon, 27 Jul
Multiple Airlines Logo
15:40 - 00:50
SEA
-
STN
25h 10m
2 stops
Multiple Airlines Logo
07:00 - 18:45
STN
-
SEA
43h 45m
3 stops
£678Multiple Airlines
Fri, 18 Sep - Mon, 5 Oct
Multiple Airlines Logo
15:40 - 19:50
SEA
-
STN
20h 10m
2 stops
Multiple Airlines Logo
22:25 - 21:00
STN
-
SEA
30h 35m
3 stops
£680Multiple Airlines
Mon, 20 Jul - Mon, 27 Jul
Multiple Airlines Logo
15:55 - 17:15
SEA
-
STN
17h 20m
1 stop
Multiple Airlines Logo
07:10 - 13:45
STN
-
SEA
14h 35m
1 stop
£681Multiple Airlines
Sun, 26 Jul - Tue, 4 Aug
Multiple Airlines Logo
15:40 - 16:30
SEA
-
STN
16h 50m
2 stops
Multiple Airlines Logo
17:25 - 15:40
STN
-
SEA
30h 15m
2 stops
£681Multiple Airlines
Wed, 30 Sep - Sat, 17 Oct
Multiple Airlines Logo
15:40 - 20:55
SEA
-
STN
21h 15m
3 stops
Multiple Airlines Logo
18:00 - 16:00
STN
-
SEA
30h 00m
2 stops
£683Multiple Airlines
Wed, 7 Oct - Wed, 14 Oct
Lufthansa Logo
18:50 - 15:35
SEA
-
STN
12h 45m
1 stop
Lufthansa Logo
16:25 - 16:59
STN
-
SEA
32h 34m
1 stop
£684Lufthansa
Sat, 19 Sep - Mon, 28 Sep

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Turkish Airlines flights from Seattle to London Stansted Airport

Our best Turkish Airlines deals on Seattle to London Stansted Airport flight tickets
Turkish Airlines
7 Sept
SEA12:35Seattle/Tacoma Intl
25h 35m
1 stop
STN22:10London Stansted
6 Oct
STN06:55London Stansted
18h 25m
1 stop
SEA17:20Seattle/Tacoma Intl
£659
Turkish Airlines
7 Oct
SEA19:15Seattle/Tacoma Intl
18h 55m
1 stop
STN22:10London Stansted
16 Oct
STN06:55London Stansted
18h 25m
1 stop
SEA17:20Seattle/Tacoma Intl
£686
Turkish Airlines
12 Nov
SEA19:05Seattle/Tacoma Intl
37h 15m
1 stop
STN16:20London Stansted
16 Nov
STN10:55London Stansted
38h 15m
1 stop
SEA17:10Seattle/Tacoma Intl
£689

Lufthansa flights from Seattle to London Stansted Airport

Our best Lufthansa deals on Seattle to London Stansted Airport flight tickets
Lufthansa
19 Sept
SEA18:50Seattle/Tacoma Intl
12h 45m
1 stop
STN15:35London Stansted
28 Sept
STN16:25London Stansted
32h 34m
1 stop
SEA16:59Seattle/Tacoma Intl
£684
Lufthansa
17 Sept
SEA18:50Seattle/Tacoma Intl
13h 20m
1 stop
STN16:10London Stansted
23 Sept
STN16:25London Stansted
32h 34m
1 stop
SEA16:59Seattle/Tacoma Intl
£688

momondo Fare Finder

 
Customise your flight search to find flights from Seattle to London Stansted Airport 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 8 June 2026.
Use the filters below to find and compare flights from Seattle to London Stansted Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Mon 7/9

12:35-22:10

1 stop25h 35m

London Stansted

Tue 6/10

06:55-17:20

1 stop18h 25m

£659

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Fri 11/9

15:40-21:10

2 stops21h 30m

London Stansted

Mon 28/9

06:30-09:40

3 stops35h 10m

£660

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Fri 11/9

15:40-21:10

2 stops21h 30m

London Stansted

Mon 21/9

06:30-09:40

3 stops35h 10m

£676

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Fri 17/7

15:40-19:30

2 stops19h 50m

London Stansted

Mon 27/7

22:25-21:00

3 stops30h 35m

£678

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Fri 18/9

15:40-00:50

2 stops25h 10m

London Stansted

Mon 5/10

07:00-18:45

3 stops43h 45m

£678

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Mon 20/7

15:40-19:50

2 stops20h 10m

London Stansted

Mon 27/7

22:25-21:00

3 stops30h 35m

£680
Fastest return journey

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Sun 26/7

15:55-17:15

1 stop17h 20m

London Stansted

Tue 4/8

07:10-13:45

1 stop14h 35m

£681

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Wed 30/9

15:40-16:30

2 stops16h 50m

London Stansted

Sat 17/10

17:25-15:40

2 stops30h 15m

£681

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Wed 7/10

15:40-20:55

3 stops21h 15m

London Stansted

Wed 14/10

18:00-16:00

2 stops30h 00m

£683

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Sat 19/9

18:50-15:35

1 stop12h 45m

London Stansted

Mon 28/9

16:25-16:59

1 stop32h 34m

£684

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 London from

How to get the cheapest flight ticket from Seattle to London Stansted Airport

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 airline that flies from Seattle/Tacoma Intl to London Stansted?

Turkish Airlines is the most popular carrier operating from Seattle/Tacoma Intl to London Stansted

When to book flights from Seattle to London Stansted Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to London Stansted Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Seattle to London Stansted Airport (SEA to STN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to London Stansted Airport

Fastest flight time

14h 40m

Direct flights

None
The fastest flight from Seattle to London Stansted Airport takes 14h 40m
There are no direct flights from Seattle to London Stansted Airport. There are no popular flight routes from Seattle to London Stansted Airport.
Search flight deals

Frequently asked questions about flying from Seattle to London Stansted Airport

  • How far is Seattle/Tacoma Intl to London Stansted by plane?

    The straight-line distance from Seattle/Tacoma Intl to London Stansted is 4769.5 mi. 14h 40m is a normal flight duration for this route.

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

    Prices for flights from Seattle/Tacoma Intl Airport to London Stansted Airport are updated daily.

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to London Stansted Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to London Stansted Airport.

  • What documentation or ID do you need to fly to London Stansted Airport?

    The required travel and health documents for your London Stansted Airport 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 London Stansted Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Travelling to a place near London?

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Why use momondo?

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

Finding the right flight to London 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 London quick and easy, saving you time and money.

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

All flight searches from Seattle to London on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Seattle to London?

Once you have performed a search for Seattle to London 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 London right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Seattle to London 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.

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