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Cheap flights from Seattle to London from $291

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 11/25. 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

Find the cheapest flights from Seattle to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:00 pm - 12:10 am
SEA
-
STN
21h 10m
2 stops
Multiple Airlines Logo
7:10 am - 8:40 pm
STN
-
SEA
21h 30m
2 stops
$679Multiple Airlines
Tue, Sep 8 - Tue, Sep 15
Multiple Airlines Logo
5:50 am - 7:15 pm
SEA
-
STN
29h 25m
3 stops
Multiple Airlines Logo
7:05 am - 9:04 pm
STN
-
SEA
21h 59m
2 stops
$681Multiple Airlines
Thu, Sep 10 - Sun, Sep 20
Multiple Airlines Logo
3:40 pm - 10:05 pm
SEA
-
STN
22h 25m
2 stops
Multiple Airlines Logo
8:50 pm - 9:04 pm
STN
-
SEA
32h 14m
3 stops
$682Multiple Airlines
Fri, Aug 28 - Mon, Sep 14
Multiple Airlines Logo
3:40 pm - 11:20 pm
SEA
-
STN
23h 40m
2 stops
Multiple Airlines Logo
7:40 pm - 9:40 am
STN
-
SEA
46h 00m
3 stops
$683Multiple Airlines
Thu, Aug 27 - Wed, Sep 2
Multiple Airlines Logo
7:00 pm - 10:25 pm
SEA
-
STN
19h 25m
2 stops
Multiple Airlines Logo
12:00 pm - 8:40 pm
STN
-
SEA
16h 40m
2 stops
$685Multiple Airlines
Mon, Aug 17 - Mon, Aug 24
Multiple Airlines Logo
7:00 pm - 12:10 am
SEA
-
STN
21h 10m
2 stops
Multiple Airlines Logo
7:10 am - 8:40 pm
STN
-
SEA
21h 30m
2 stops
$686Multiple Airlines
Tue, Sep 8 - Tue, Sep 15
Multiple Airlines Logo
3:40 pm - 4:50 pm
SEA
-
STN
17h 10m
2 stops
Multiple Airlines Logo
7:15 pm - 8:40 pm
STN
-
SEA
33h 25m
2 stops
$688Multiple Airlines
Mon, Aug 17 - Mon, Aug 24
Multiple Airlines Logo
8:00 am - 11:05 am
SEA
-
STN
19h 05m
3 stops
Multiple Airlines Logo
10:05 pm - 10:42 pm
STN
-
SEA
32h 37m
3 stops
$689Multiple Airlines
Tue, Aug 18 - Thu, Aug 27
Multiple Airlines Logo
7:00 pm - 12:20 am
SEA
-
STN
21h 20m
2 stops
Multiple Airlines Logo
8:45 pm - 9:40 am
STN
-
SEA
44h 55m
3 stops
$690Multiple Airlines
Mon, Aug 24 - Mon, Aug 31
Multiple Airlines Logo
3:40 pm - 6:50 pm
SEA
-
STN
19h 10m
2 stops
Multiple Airlines Logo
7:15 pm - 8:40 pm
STN
-
SEA
33h 25m
2 stops
$693Multiple Airlines
Mon, Aug 17 - Mon, Aug 24

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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
Jul 22
SEA7:15 pmSeattle/Tacoma Intl
30h 40m
1 stop
STN9:55 amLondon Stansted
Sep 13
STN10:50 amLondon Stansted
38h 30m
1 stop
SEA5:20 pmSeattle/Tacoma Intl
$1,050
Turkish Airlines
Jul 20
SEA12:35 pmSeattle/Tacoma Intl
20h 05m
1 stop
STN4:40 pmLondon Stansted
Jul 24
STN5:35 pmLondon Stansted
25h 05m
1 stop
SEA10:40 amSeattle/Tacoma Intl
$1,128
Turkish Airlines
Jul 21
SEA7:15 pmSeattle/Tacoma Intl
37h 25m
1 stop
STN4:40 pmLondon Stansted
Jul 24
STN10:50 amLondon Stansted
31h 50m
1 stop
SEA10:40 amSeattle/Tacoma Intl
$1,161

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 July 12, 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 round-trip

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Tue 9/8

7:00 pm-12:10 am

2 stops21h 10m

London Stansted

Tue 9/15

7:10 am-8:40 pm

2 stops21h 30m

$679

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Thu 9/10

5:50 am-7:15 pm

3 stops29h 25m

London Stansted

Sun 9/20

7:05 am-9:04 pm

2 stops21h 59m

$681

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Fri 8/28

3:40 pm-10:05 pm

2 stops22h 25m

London Stansted

Mon 9/14

8:50 pm-9:04 pm

3 stops32h 14m

$682

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Thu 8/27

3:40 pm-11:20 pm

2 stops23h 40m

London Stansted

Wed 9/2

7:40 pm-9:40 am

3 stops46h 00m

$683
Quickest round-trip

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Mon 8/17

7:00 pm-10:25 pm

2 stops19h 25m

London Stansted

Mon 8/24

12:00 pm-8:40 pm

2 stops16h 40m

$685

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Tue 9/8

7:00 pm-12:10 am

2 stops21h 10m

London Stansted

Tue 9/15

7:10 am-8:40 pm

2 stops21h 30m

$686

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Mon 8/17

3:40 pm-4:50 pm

2 stops17h 10m

London Stansted

Mon 8/24

7:15 pm-8:40 pm

2 stops33h 25m

$688

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Tue 8/18

8:00 am-11:05 am

3 stops19h 05m

London Stansted

Thu 8/27

10:05 pm-10:42 pm

3 stops32h 37m

$689

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Mon 8/24

7:00 pm-12:20 am

2 stops21h 20m

London Stansted

Mon 8/31

8:45 pm-9:40 am

3 stops44h 55m

$690

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Mon 8/17

3:40 pm-6:50 pm

2 stops19h 10m

London Stansted

Mon 8/24

7:15 pm-8:40 pm

2 stops33h 25m

$693

Flights are sorted by cheapest round-trip 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?

Lufthansa and Turkish Airlines are the most popular carriers 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 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

15h 50m

Direct flights

None
The fastest flight from Seattle to London Stansted Airport takes 15h 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

Frequently asked questions about flying from Seattle to London Stansted Airport

  • 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 15h 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.

Traveling to a place near London?

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

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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