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Cheap flights from Seattle to London from $345

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 3/7. 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 round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
2:35 pm - 10:20 pm
SEA
-
STN
23h 45m2 stops
Multiple Airlines Logo
5:55 am - 5:00 pm
STN
-
SEA
19h 05m2 stops
$579Multiple Airlines
Sat, Feb 21 - Sat, Feb 28
Multiple Airlines Logo
2:00 pm - 11:35 pm
SEA
-
STN
25h 35m2 stops
Multiple Airlines Logo
4:20 pm - 1:20 pm
STN
-
SEA
29h 00m2 stops
$585Multiple Airlines
Sat, Jan 31 - Sat, Feb 7
Multiple Airlines Logo
3:10 pm - 8:05 pm
SEA
-
STN
20h 55m3 stops
Multiple Airlines Logo
9:10 pm - 1:20 pm
STN
-
SEA
24h 10m2 stops
$588Multiple Airlines
Sun, Feb 1 - Sat, Feb 7
Multiple Airlines Logo
3:10 pm - 8:35 pm
SEA
-
STN
21h 25m3 stops
Multiple Airlines Logo
9:00 pm - 1:20 pm
STN
-
SEA
24h 20m2 stops
$589Multiple Airlines
Fri, Jan 23 - Sat, Jan 31
Multiple Airlines Logo
3:10 pm - 12:50 am
SEA
-
STN
25h 40m2 stops
Multiple Airlines Logo
6:15 am - 10:06 pm
STN
-
SEA
23h 51m3 stops
$595Multiple Airlines
Sun, Jan 11 - Sun, Jan 18
Multiple Airlines Logo
2:35 pm - 3:45 pm
SEA
-
STN
17h 10m2 stops
Multiple Airlines Logo
7:35 am - 5:00 pm
STN
-
SEA
17h 25m2 stops
$596Multiple Airlines
Mon, Jan 12 - Mon, Jan 26
Multiple Airlines Logo
8:10 am - 7:10 pm
SEA
-
STN
27h 00m2 stops
Multiple Airlines Logo
7:35 pm - 10:16 pm
STN
-
SEA
34h 41m2 stops
$598Multiple Airlines
Sat, Feb 14 - Sat, Feb 21
Multiple Airlines Logo
3:10 pm - 8:35 pm
SEA
-
STN
21h 25m2 stops
Multiple Airlines Logo
9:40 pm - 1:10 pm
STN
-
SEA
22h 30m2 stops
$599Multiple Airlines
Fri, Mar 6 - Sun, Mar 15
Multiple Airlines Logo
5:50 am - 1:30 pm
SEA
-
STN
23h 40m3 stops
Multiple Airlines Logo
9:35 am - 12:10 pm
STN
-
SEA
34h 35m2 stops
$602Multiple Airlines
Sun, Jan 18 - Sun, Jan 25
Multiple Airlines Logo
2:00 pm - 12:40 am
SEA
-
STN
26h 40m2 stops
Multiple Airlines Logo
9:00 pm - 10:51 pm
STN
-
SEA
33h 51m3 stops
$603Multiple Airlines
Thu, Feb 5 - Sat, Feb 14

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 25
SEA8:00 pmSeattle/Tacoma Intl
37h 20m
1 stop
STN4:20 pmLondon Stansted
Apr 8
STN6:15 amLondon Stansted
19h 00m
1 stop
SEA5:15 pmSeattle/Tacoma Intl
$720
Find similar
Turkish Airlines
Mar 24
SEA8:00 pmSeattle/Tacoma Intl
37h 20m
1 stop
STN4:20 pmLondon Stansted
Apr 7
STN6:15 amLondon Stansted
19h 00m
1 stop
SEA5:15 pmSeattle/Tacoma Intl
$729
Find similar
Turkish Airlines
Mar 29
SEA7:10 pmSeattle/Tacoma Intl
37h 40m
1 stop
STN4:50 pmLondon Stansted
Apr 8
STN6:15 amLondon Stansted
19h 00m
1 stop
SEA5:15 pmSeattle/Tacoma Intl
$738
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 December 16, 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

Sat 2/21

2:35 pm-10:20 pm

2 stops23h 45m

London Stansted

Sat 2/28

5:55 am-5:00 pm

2 stops19h 05m

$579

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Sat 1/31

2:00 pm-11:35 pm

2 stops25h 35m

London Stansted

Sat 2/7

4:20 pm-1:20 pm

2 stops29h 00m

$585

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Sun 2/1

3:10 pm-8:05 pm

3 stops20h 55m

London Stansted

Sat 2/7

9:10 pm-1:20 pm

2 stops24h 10m

$588

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Fri 1/23

3:10 pm-8:35 pm

3 stops21h 25m

London Stansted

Sat 1/31

9:00 pm-1:20 pm

2 stops24h 20m

$589

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Sun 1/11

3:10 pm-12:50 am

2 stops25h 40m

London Stansted

Sun 1/18

6:15 am-10:06 pm

3 stops23h 51m

$595

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Mon 1/12

2:35 pm-3:45 pm

2 stops17h 10m

London Stansted

Mon 1/26

7:35 am-5:00 pm

2 stops17h 25m

$596

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Sat 2/14

8:10 am-7:10 pm

2 stops27h 00m

London Stansted

Sat 2/21

7:35 pm-10:16 pm

2 stops34h 41m

$598

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Fri 3/6

3:10 pm-8:35 pm

2 stops21h 25m

London Stansted

Sun 3/15

9:40 pm-1:10 pm

2 stops22h 30m

$599

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Sun 1/18

5:50 am-1:30 pm

3 stops23h 40m

London Stansted

Sun 1/25

9:35 am-12:10 pm

2 stops34h 35m

$602

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Thu 2/5

2:00 pm-12:40 am

2 stops26h 40m

London Stansted

Sat 2/14

9:00 pm-10:51 pm

3 stops33h 51m

$603

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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

Fastest flight time

11h 50m

Direct flights

None
The fastest flight from Seattle to London Stansted Airport takes 11h 50m
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

  • 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 11h 50m, 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
Wembley
Watford
Ilford
Cobham
Folkestone
Romford
Richmond
Uxbridge
Stansted

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.
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