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Cheap flights from Seattle to London from $362

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 9/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Seattle to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
3:40 pm - 3:25 pm
SEA
-
STN
15h 45m
2 stops
Multiple Airlines Logo
7:00 am - 5:55 pm
STN
-
SEA
18h 55m
2 stops
$901Multiple Airlines
Fri, Aug 21 - Wed, Aug 26
Multiple Airlines Logo
11:25 pm - 12:30 am
SEA
-
STN
17h 05m
2 stops
Multiple Airlines Logo
10:45 am - 11:45 am
STN
-
SEA
33h 00m
2 stops
$903Multiple Airlines
Thu, Jul 23 - Tue, Jul 28
Multiple Airlines Logo
3:40 pm - 7:30 pm
SEA
-
STN
19h 50m
2 stops
Multiple Airlines Logo
10:25 pm - 9:00 pm
STN
-
SEA
30h 35m
3 stops
$904Multiple Airlines
Fri, Jul 17 - Mon, Jul 27
Multiple Airlines Logo
7:00 pm - 12:30 am
SEA
-
STN
21h 30m
2 stops
Multiple Airlines Logo
7:55 pm - 5:10 pm
STN
-
SEA
29h 15m
2 stops
$905Multiple Airlines
Thu, Sep 3 - Sat, Sep 19
Multiple Airlines Logo
5:45 am - 10:55 pm
SEA
-
STN
33h 10m
3 stops
Multiple Airlines Logo
10:00 pm - 9:00 pm
STN
-
SEA
31h 00m
3 stops
$907Multiple Airlines
Fri, Aug 14 - Wed, Aug 26
Multiple Airlines Logo
3:55 pm - 5:15 pm
SEA
-
STN
17h 20m
1 stop
Multiple Airlines Logo
7:10 am - 1:45 pm
STN
-
SEA
14h 35m
1 stop
$908Multiple Airlines
Sun, Jul 26 - Tue, Aug 4
Multiple Airlines Logo
3:40 pm - 4:30 pm
SEA
-
STN
16h 50m
2 stops
Multiple Airlines Logo
5:25 pm - 3:40 pm
STN
-
SEA
30h 15m
2 stops
$909Multiple Airlines
Wed, Sep 30 - Sat, Oct 17
Multiple Airlines Logo
1:30 pm - 12:10 am
SEA
-
STN
26h 40m
2 stops
Multiple Airlines Logo
6:30 am - 9:40 am
STN
-
SEA
35h 10m
3 stops
$911Multiple Airlines
Tue, Jun 30 - Thu, Jul 9
Multiple Airlines Logo
3:40 pm - 9:10 pm
SEA
-
STN
21h 30m
2 stops
Multiple Airlines Logo
3:00 pm - 11:45 am
STN
-
SEA
28h 45m
2 stops
$912Multiple Airlines
Fri, Jul 3 - Wed, Jul 15
Multiple Airlines Logo
7:00 pm - 9:25 pm
SEA
-
STN
18h 25m
2 stops
Multiple Airlines Logo
9:55 am - 5:55 pm
STN
-
SEA
16h 00m
2 stops
$913Multiple Airlines
Mon, Jul 27 - Wed, Aug 12

Turkish Airlines flights from Seattle to London Stansted Airport

Our best Turkish Airlines deals on Seattle to London Stansted Airport flight tickets
Turkish Airlines
Oct 7
SEA7:15 pmSeattle/Tacoma Intl
18h 55m
1 stop
STN10:10 pmLondon Stansted
Oct 16
STN6:55 amLondon Stansted
18h 25m
1 stop
SEA5:20 pmSeattle/Tacoma Intl
$915
Turkish Airlines
Nov 12
SEA7:05 pmSeattle/Tacoma Intl
30h 50m
1 stop
STN9:55 amLondon Stansted
Nov 16
STN10:55 amLondon Stansted
38h 15m
1 stop
SEA5:10 pmSeattle/Tacoma Intl
$919
Turkish Airlines
Sep 7
SEA7:15 pmSeattle/Tacoma Intl
18h 55m
1 stop
STN10:10 pmLondon Stansted
Oct 21
STN6:55 amLondon Stansted
18h 25m
1 stop
SEA5:20 pmSeattle/Tacoma Intl
$921

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 June 8, 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

Fri 8/21

3:40 pm-3:25 pm

2 stops15h 45m

London Stansted

Wed 8/26

7:00 am-5:55 pm

2 stops18h 55m

$901

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Thu 7/23

11:25 pm-12:30 am

2 stops17h 05m

London Stansted

Tue 7/28

10:45 am-11:45 am

2 stops33h 00m

$903

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Fri 7/17

3:40 pm-7:30 pm

2 stops19h 50m

London Stansted

Mon 7/27

10:25 pm-9:00 pm

3 stops30h 35m

$904

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Thu 9/3

7:00 pm-12:30 am

2 stops21h 30m

London Stansted

Sat 9/19

7:55 pm-5:10 pm

2 stops29h 15m

$905

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Fri 8/14

5:45 am-10:55 pm

3 stops33h 10m

London Stansted

Wed 8/26

10:00 pm-9:00 pm

3 stops31h 00m

$907
Quickest round-trip

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Sun 7/26

3:55 pm-5:15 pm

1 stop17h 20m

London Stansted

Tue 8/4

7:10 am-1:45 pm

1 stop14h 35m

$908

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Wed 9/30

3:40 pm-4:30 pm

2 stops16h 50m

London Stansted

Sat 10/17

5:25 pm-3:40 pm

2 stops30h 15m

$909

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Tue 6/30

1:30 pm-12:10 am

2 stops26h 40m

London Stansted

Thu 7/9

6:30 am-9:40 am

3 stops35h 10m

$911

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Fri 7/3

3:40 pm-9:10 pm

2 stops21h 30m

London Stansted

Wed 7/15

3:00 pm-11:45 am

2 stops28h 45m

$912

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Mon 7/27

7:00 pm-9:25 pm

2 stops18h 25m

London Stansted

Wed 8/12

9:55 am-5:55 pm

2 stops16h 00m

$913

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?

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 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

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?

    There are 4769.5 mi between Seattle/Tacoma Intl and London Stansted. Flights usually cover this in 14h 40m, 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
Dover
Hayes
Crawley
Croydon
Wembley
Stansted
Slough
Harrow
Brentwood
Watford
Cobham
Guildford
Folkestone
Uxbridge
Romford
Chelmsford

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

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