How do I get Price Alerts for flights from Seattle to London Stansted Airport?

Price Alerts will notify you by email when the price for flights to London Stansted Airport from Seattle decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

How can I save money on flights from Seattle to London Stansted Airport with momondo?

Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore” . Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

How does momondo find its flight prices?

We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

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.

£234 Cheap Flights from Seattle to London Stansted Airport in 2026

Find the cheapest flights from Seattle to London

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

15:40 - 00:50SEA Seattle/Tacoma Intl-STN London Stansted

25h 10m2 stops Reykjavik Keflavik Intl Oslo Gardermoen

05:55 - 20:40STN London Stansted-SEA Seattle/Tacoma Intl

22h 45m2 stops Oslo Gardermoen Reykjavik Keflavik Intl

£474Multiple Airlines

Fri, 9 Oct - Sun, 18 Oct

07:45 - 21:35SEA Seattle/Tacoma Intl-STN London Stansted

29h 50m3 stops Toronto Pearson Intl Munich Franz Josef Strauss Kastrup Copenhagen

18:00 - 12:00STN London Stansted-SEA Seattle/Tacoma Intl

26h 00m2 stops Kastrup Copenhagen Frankfurt am Main

£548Multiple Airlines

Sun, 1 Nov - Fri, 6 Nov

05:50 - 17:05SEA Seattle/Tacoma Intl-STN London Stansted

27h 15m3 stops Vancouver Intl Toronto Pearson Intl Dublin

22:00 - 12:20STN London Stansted-SEA Seattle/Tacoma Intl

22h 20m2 stops Dublin Frankfurt am Main

£570Multiple Airlines

Mon, 12 Oct - Sun, 18 Oct

15:35 - 21:55SEA Seattle/Tacoma Intl-STN London Stansted

23h 20m2 stops Reykjavik Keflavik Intl Dublin

06:35 - 18:00STN London Stansted-SEA Seattle/Tacoma Intl

18h 25m2 stops Dublin Reykjavik Keflavik Intl

£570Multiple Airlines

Mon, 26 Oct - Sat, 31 Oct

15:00 - 21:25SEA Seattle/Tacoma Intl-STN London Stansted

22h 25m3 stops Vancouver Intl Munich Franz Josef Strauss Václav Havel Prague

08:30 - 22:47STN London Stansted-SEA Seattle/Tacoma Intl

22h 17m3 stops Václav Havel Prague Munich Franz Josef Strauss Vancouver Intl

£576Multiple Airlines

Tue, 13 Oct - Tue, 20 Oct

10:50 - 12:55SEA Seattle/Tacoma Intl-STN London Stansted

18h 05m2 stops Vancouver Intl Dublin

06:35 - 14:22STN London Stansted-SEA Seattle/Tacoma Intl

15h 47m2 stops Dublin Vancouver Intl

£577Multiple Airlines

Sat, 10 Oct - Sat, 17 Oct

18:50 - 17:10SEA Seattle/Tacoma Intl-STN London Stansted

14h 20m1 stop Munich Franz Josef Strauss

11:00 - 16:59STN London Stansted-SEA Seattle/Tacoma Intl

13h 59m1 stop Munich Franz Josef Strauss

£577Lufthansa

Thu, 24 Sep - Wed, 7 Oct

19:10 - 19:30SEA Seattle/Tacoma Intl-STN London Stansted

16h 20m1 stop Dublin

08:30 - 17:10STN London Stansted-SEA Seattle/Tacoma Intl

16h 40m1 stop Dublin

£577Multiple Airlines

Sun, 11 Oct - Sun, 18 Oct

07:45 - 18:25SEA Seattle/Tacoma Intl-STN London Stansted

26h 40m3 stops Toronto Pearson Intl Frankfurt am Main Oslo Gardermoen

13:55 - 13:00STN London Stansted-SEA Seattle/Tacoma Intl

31h 05m2 stops Oslo Gardermoen Munich Franz Josef Strauss

£577Multiple Airlines

Sat, 21 Nov - Sat, 28 Nov

18:50 - 15:40SEA Seattle/Tacoma Intl-STN London Stansted

12h 50m1 stop Munich Franz Josef Strauss

16:25 - 16:59STN London Stansted-SEA Seattle/Tacoma Intl

32h 34m1 stop Munich Franz Josef Strauss

£585Lufthansa

Thu, 1 Oct - Mon, 5 Oct

Cheap last-minute flights

Enter your travel dates to find the best prices.

12:55 - 22:20SEA Seattle/Tacoma Intl-STN London Stansted

25h 25m2 stops Los Angeles Los Angeles Dublin

06:30 - 17:10STN London Stansted-SEA Seattle/Tacoma Intl

18h 40m1 stop Dublin

£574Multiple Airlines

Sun, 20 Sep - Tue, 6 Oct

15:55 - 17:15SEA Seattle/Tacoma Intl-STN London Stansted

17h 20m1 stop Kastrup Copenhagen

07:10 - 13:45STN London Stansted-SEA Seattle/Tacoma Intl

14h 35m1 stop Kastrup Copenhagen

£577Multiple Airlines

Sun, 20 Sep - Tue, 6 Oct

15:55 - 07:45SEA Seattle/Tacoma Intl-STN London Stansted

31h 50m2 stops Kastrup Copenhagen Edinburgh Turnhouse

07:10 - 13:45STN London Stansted-SEA Seattle/Tacoma Intl

14h 35m1 stop Kastrup Copenhagen

£585Multiple Airlines

Sun, 20 Sep - Tue, 6 Oct

12:55 - 23:25SEA Seattle/Tacoma Intl-STN London Stansted

26h 30m2 stops Los Angeles Los Angeles Dublin

11:35 - 17:10STN London Stansted-SEA Seattle/Tacoma Intl

13h 35m1 stop Dublin

£592Multiple Airlines

Sun, 20 Sep - Tue, 6 Oct

15:55 - 15:40SEA Seattle/Tacoma Intl-STN London Stansted

15h 45m1 stop Kastrup Copenhagen

07:10 - 13:45STN London Stansted-SEA Seattle/Tacoma Intl

14h 35m1 stop Kastrup Copenhagen

£594Multiple Airlines

Sun, 20 Sep - Tue, 6 Oct

05:50 - 12:55SEA Seattle/Tacoma Intl-STN London Stansted

23h 05m3 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl Dublin

06:30 - 16:59STN London Stansted-SEA Seattle/Tacoma Intl

18h 29m2 stops Dublin Munich Franz Josef Strauss

£604Multiple Airlines

Sun, 20 Sep - Tue, 6 Oct

05:50 - 12:55SEA Seattle/Tacoma Intl-STN London Stansted

23h 05m3 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl Dublin

06:30 - 16:59STN London Stansted-SEA Seattle/Tacoma Intl

18h 29m2 stops Dublin Munich Franz Josef Strauss

£605Multiple Airlines

Sun, 20 Sep - Tue, 6 Oct

05:50 - 12:55SEA Seattle/Tacoma Intl-STN London Stansted

23h 05m3 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl Dublin

06:30 - 16:59STN London Stansted-SEA Seattle/Tacoma Intl

18h 29m2 stops Dublin Munich Franz Josef Strauss

£608Multiple Airlines

Sun, 20 Sep - Tue, 6 Oct

17:50 - 16:50SEA Seattle/Tacoma Intl-STN London Stansted

39h 00m2 stops Chicago O'Hare Intl Kastrup Copenhagen

07:10 - 13:45STN London Stansted-SEA Seattle/Tacoma Intl

14h 35m1 stop Kastrup Copenhagen

£617Multiple Airlines

Sun, 20 Sep - Tue, 6 Oct

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Lufthansa flights from Seattle to London Stansted Airport

Our best Lufthansa deals on Seattle to London Stansted Airport flight tickets

Lufthansa

24 Sept

SEA18:50Seattle/Tacoma Intl

14h 20m

1 stop

STN17:10London Stansted

7 Oct

STN11:00London Stansted

13h 59m

1 stop

SEA16:59Seattle/Tacoma Intl

£577

Lufthansa

1 Oct

SEA18:50Seattle/Tacoma Intl

12h 50m

1 stop

STN15:40London Stansted

5 Oct

STN16:25London Stansted

32h 34m

1 stop

SEA16:59Seattle/Tacoma Intl

£585

Lufthansa

1 Oct

SEA18:50Seattle/Tacoma Intl

12h 50m

1 stop

STN15:40London Stansted

5 Oct

STN16:25London Stansted

32h 34m

1 stop

SEA16:59Seattle/Tacoma Intl

£593

Turkish Airlines flights from Seattle to London Stansted Airport

Our best Turkish Airlines deals on Seattle to London Stansted Airport flight tickets

Turkish Airlines

27 Oct

SEA20:05Seattle/Tacoma Intl

30h 50m

1 stop

STN09:55London Stansted

3 Nov

STN17:20London Stansted

32h 50m

1 stop

SEA18:10Seattle/Tacoma Intl

£635

Turkish Airlines

7 Oct

SEA19:15Seattle/Tacoma Intl

37h 25m

1 stop

STN16:40London Stansted

14 Oct

STN17:45London Stansted

31h 35m

1 stop

SEA17:20Seattle/Tacoma Intl

£639

Turkish Airlines

20 Oct

SEA19:15Seattle/Tacoma Intl

37h 25m

1 stop

STN16:40London Stansted

27 Oct

STN17:20London Stansted

31h 50m

1 stop

SEA18:10Seattle/Tacoma Intl

£649

momondo Fare Finder

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 Seattle/Tacoma Intl - STN London Stansted

SEASTN

Seattle/Tacoma Intl

Fri 9/10

15:40-00:50

2 stops25h 10m

London Stansted

Sun 18/10

05:55-20:40

2 stops22h 45m

£474

SeattleLondon

SEA Seattle/Tacoma Intl - STN London Stansted

SEASTN

Seattle/Tacoma Intl

Sun 1/11

07:45-21:35

3 stops29h 50m

London Stansted

Fri 6/11

18:00-12:00

2 stops26h 00m

£548

SeattleLondon

SEA Seattle/Tacoma Intl - STN London Stansted

SEASTN

Seattle/Tacoma Intl

Mon 12/10

05:50-17:05

3 stops27h 15m

London Stansted

Sun 18/10

22:00-12:20

2 stops22h 20m

£570

SeattleLondon

SEA Seattle/Tacoma Intl - STN London Stansted

SEASTN

Seattle/Tacoma Intl

Mon 26/10

15:35-21:55

2 stops23h 20m

London Stansted

Sat 31/10

06:35-18:00

2 stops18h 25m

£570

SeattleLondon

SEA Seattle/Tacoma Intl - STN London Stansted

SEASTN

Seattle/Tacoma Intl

Tue 13/10

15:00-21:25

3 stops22h 25m

London Stansted

Tue 20/10

08:30-22:47

3 stops22h 17m

£576

SeattleLondon

SEA Seattle/Tacoma Intl - STN London Stansted

SEASTN

Seattle/Tacoma Intl

Sat 10/10

10:50-12:55

2 stops18h 05m

London Stansted

Sat 17/10

06:35-14:22

2 stops15h 47m

£577

Fastest return journey

SeattleLondon

SEA Seattle/Tacoma Intl - STN London Stansted

SEASTN

Seattle/Tacoma Intl

Thu 24/9

18:50-17:10

1 stop14h 20m

London Stansted

Wed 7/10

11:00-16:59

1 stop13h 59m

£577

SeattleLondon

SEA Seattle/Tacoma Intl - STN London Stansted

SEASTN

Seattle/Tacoma Intl

Sun 11/10

19:10-19:30

1 stop16h 20m

London Stansted

Sun 18/10

08:30-17:10

1 stop16h 40m

£577

SeattleLondon

SEA Seattle/Tacoma Intl - STN London Stansted

SEASTN

Seattle/Tacoma Intl

Sat 21/11

07:45-18:25

3 stops26h 40m

London Stansted

Sat 28/11

13:55-13:00

2 stops31h 05m

£577

SeattleLondon

SEA Seattle/Tacoma Intl - STN London Stansted

SEASTN

Seattle/Tacoma Intl

Thu 1/10

18:50-15:40

1 stop12h 50m

London Stansted

Mon 5/10

16:25-16:59

1 stop32h 34m

£585

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Best price found	£234
Fastest flight time	15h 05m
Direct flights	None

The best one-way flight to London Stansted Airport from Seattle in the past 72 hours is £234. The best return flight deal from Seattle to London Stansted Airport found on momondo in the last 72 hours is £474.

The fastest flight from Seattle to London Stansted Airport takes 15h 05m

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. 15h 05m 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.

Frequently asked questions about flying from Seattle to London Stansted Airport

How do I get Price Alerts for flights from Seattle to London Stansted Airport?
Price Alerts will notify you by email when the price for flights to London Stansted Airport from Seattle decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.
How can I save money on flights from Seattle to London Stansted Airport with momondo?
Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.
How does momondo find its flight prices?
We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

Eastbourne

Wembley

Gatwick

Milton Keynes

Southend-on-Sea

Luton

Slough

Ipswich

Maidstone

Folkestone

Hastings

Ilford

Canterbury

Chichester

Hayes

Bedford

Guildford

Colchester

Harlow

Chelmsford

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.