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Cheap flights from Seattle to London from $342

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 12/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
3:10 pm - 5:30 pmSEA-STN
18h 20m2 stops
Multiple Airlines Logo
4:55 pm - 7:16 pmSTN-SEA
34h 21m3 stops
$582Multiple Airlines
Find Deal
vie., ene. 9 - sáb., ene. 17
Multiple Airlines Logo
3:10 pm - 5:30 pmSEA-STN
18h 20m2 stops
Multiple Airlines Logo
4:55 pm - 7:16 pmSTN-SEA
34h 21m3 stops
$583Multiple Airlines
Find Deal
vie., ene. 9 - sáb., ene. 17
Multiple Airlines Logo
8:05 pm - 11:00 pmSEA-STN
18h 55m1 stop
Multiple Airlines Logo
6:30 am - 6:20 pmSTN-SEA
19h 50m1 stop
$586Multiple Airlines
Find Deal
dom., feb. 15 - mié., feb. 25
Multiple Airlines Logo
2:35 pm - 6:25 pmSEA-STN
19h 50m2 stops
Multiple Airlines Logo
4:10 pm - 5:00 pmSTN-SEA
32h 50m2 stops
$594Multiple Airlines
Find Deal
vie., dic. 5 - mar., dic. 9
Multiple Airlines Logo
3:10 pm - 6:10 pmSEA-STN
19h 00m2 stops
Multiple Airlines Logo
4:05 pm - 1:20 pmSTN-SEA
29h 15m2 stops
$595Multiple Airlines
Find Deal
mié., ene. 14 - jue., ene. 22
Multiple Airlines Logo
3:10 pm - 11:10 pmSEA-STN
24h 00m2 stops
Multiple Airlines Logo
8:45 pm - 10:16 pmSTN-SEA
33h 31m3 stops
$602Multiple Airlines
Find Deal
vie., ene. 9 - vie., ene. 16
Multiple Airlines Logo
5:50 am - 8:30 pmSEA-STN
30h 40m3 stops
Multiple Airlines Logo
2:25 pm - 12:10 pmSTN-SEA
29h 45m2 stops
$604Multiple Airlines
Find Deal
mar., dic. 2 - mié., dic. 10
Multiple Airlines Logo
6:40 pm - 11:25 pmSEA-STN
21h 45m2 stops
Multiple Airlines Logo
5:55 am - 4:40 pmSTN-SEA
17h 45m2 stops
$605Multiple Airlines
Find Deal
sáb., mar. 14 - sáb., mar. 21
Multiple Airlines Logo
3:10 pm - 10:50 pmSEA-STN
23h 40m2 stops
Multiple Airlines Logo
9:45 pm - 12:10 pmSTN-SEA
22h 25m2 stops
$606Multiple Airlines
Find Deal
mié., dic. 3 - mié., dic. 10
Multiple Airlines Logo
3:10 pm - 11:25 pmSEA-STN
24h 15m2 stops
Multiple Airlines Logo
7:25 pm - 12:10 pmSTN-SEA
24h 45m2 stops
$607Multiple Airlines
Find Deal
vie., ene. 9 - mié., ene. 21

Turkish Airlines flights from Seattle to London Stansted Airport

Our best Turkish Airlines deals on Seattle to London Stansted Airport flight tickets
Turkish Airlines
Mar 23
SEA8:00 pmSeattle/Tacoma Intl
19h 15m
1 stop
STN10:15 pmLondon Stansted
Mar 31
STN5:45 pmLondon Stansted
31h 30m
1 stop
SEA5:15 pmSeattle/Tacoma Intl
$706
Find similar
Turkish Airlines
Mar 16
SEA8:00 pmSeattle/Tacoma Intl
30h 50m
1 stop
STN9:50 amLondon Stansted
Mar 23
STN10:50 amLondon Stansted
38h 15m
1 stop
SEA6:05 pmSeattle/Tacoma Intl
$715
Find similar
Turkish Airlines
Apr 7
SEA7:10 pmSeattle/Tacoma Intl
37h 40m
1 stop
STN4:50 pmLondon Stansted
Apr 14
STN6:15 amLondon Stansted
19h 00m
1 stop
SEA5:15 pmSeattle/Tacoma Intl
$720
Find similar

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated noviembre 20, 2025.
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

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

vie. 1/9

3:10 pm-5:30 pm

2 stops18h 20m

London Stansted

sáb. 1/17

4:55 pm-7:16 pm

3 stops34h 21m

$582

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

vie. 1/9

3:10 pm-5:30 pm

2 stops18h 20m

London Stansted

sáb. 1/17

4:55 pm-7:16 pm

3 stops34h 21m

$583

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

dom. 2/15

8:05 pm-11:00 pm

1 stop18h 55m

London Stansted

mié. 2/25

6:30 am-6:20 pm

1 stop19h 50m

$586

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

vie. 12/5

2:35 pm-6:25 pm

2 stops19h 50m

London Stansted

mar. 12/9

4:10 pm-5:00 pm

2 stops32h 50m

$594

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

mié. 1/14

3:10 pm-6:10 pm

2 stops19h 00m

London Stansted

jue. 1/22

4:05 pm-1:20 pm

2 stops29h 15m

$595

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

vie. 1/9

3:10 pm-11:10 pm

2 stops24h 00m

London Stansted

vie. 1/16

8:45 pm-10:16 pm

3 stops33h 31m

$602

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

mar. 12/2

5:50 am-8:30 pm

3 stops30h 40m

London Stansted

mié. 12/10

2:25 pm-12:10 pm

2 stops29h 45m

$604

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

sáb. 3/14

6:40 pm-11:25 pm

2 stops21h 45m

London Stansted

sáb. 3/21

5:55 am-4:40 pm

2 stops17h 45m

$605

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

mié. 12/3

3:10 pm-10:50 pm

2 stops23h 40m

London Stansted

mié. 12/10

9:45 pm-12:10 pm

2 stops22h 25m

$606

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

vie. 1/9

3:10 pm-11:25 pm

2 stops24h 15m

London Stansted

mié. 1/21

7:25 pm-12:10 pm

2 stops24h 45m

$607

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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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 round-trip 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

Direct flights

None
There are no direct flights from Seattle to London Stansted Airport. There are no popular flight routes from Seattle to London Stansted Airport.
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  • How far is Seattle/Tacoma Intl to London Stansted by plane?

    There are 4769.5 mi between Seattle/Tacoma Intl and London Stansted. Flights usually cover this in 16h 00m, depending on flying conditions and air traffic around both airports.

  • 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?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, 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 travel and health documents you'll need for your trip to London Stansted Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Stansted Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

    Confirm your travel details to search for the latest offers for flights from Seattle to London Stansted Airport. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

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

    By using tools like our “Price Calendar”, you can see the best day to fly round-trip for your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

  • 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.

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Hounslow
Milton Keynes
Dover
Luton
Slough
Guildford
Hayes
Dartford
Crawley
Brentwood
Chelmsford
Wembley
Folkestone
Romford
Ilford
Cobham
Stansted
Harrow
Watford

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from Seattle.

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?

Price alerts on flights to London from Seattle are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your London Stansted Airport 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.
Start using Trips
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