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Cheap flights from Seattle to London from $353

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 9/10. 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 - 11:20 pm
SEA
-
STN
20h 20m
2 stops
Multiple Airlines Logo
11:25 am - 8:40 pm
STN
-
SEA
17h 15m
2 stops
$871Multiple Airlines
Sun, Sep 6 - Sat, Sep 12
Lufthansa Logo
7:00 am - 10:10 am
SEA
-
STN
19h 10m
2 stops
Lufthansa Logo
4:25 pm - 4:59 pm
STN
-
SEA
32h 34m
1 stop
$872Lufthansa
Mon, Sep 21 - Mon, Sep 28
Multiple Airlines Logo
3:40 pm - 11:20 pm
SEA
-
STN
23h 40m
2 stops
Multiple Airlines Logo
10:05 pm - 9:00 pm
STN
-
SEA
30h 55m
3 stops
$874Multiple Airlines
Sun, Jul 19 - Thu, Jul 23
Turkish Airlines Logo
7:15 pm - 9:55 am
SEA
-
STN
30h 40m
1 stop
Turkish Airlines Logo
5:35 pm - 5:20 pm
STN
-
SEA
31h 45m
1 stop
$875Turkish Airlines
Thu, Oct 1 - Tue, Oct 6
Multiple Airlines Logo
7:00 pm - 9:45 pm
SEA
-
STN
18h 45m
2 stops
Multiple Airlines Logo
6:30 am - 9:40 am
STN
-
SEA
35h 10m
3 stops
$876Multiple Airlines
Sun, Jul 12 - Thu, Jul 16
Multiple Airlines Logo
3:40 pm - 11:20 pm
SEA
-
STN
23h 40m
2 stops
Multiple Airlines Logo
6:30 am - 9:40 am
STN
-
SEA
35h 10m
3 stops
$877Multiple Airlines
Wed, Jul 29 - Wed, Aug 5
Turkish Airlines Logo
7:15 pm - 10:10 pm
SEA
-
STN
18h 55m
1 stop
Turkish Airlines Logo
5:45 pm - 5:20 pm
STN
-
SEA
31h 35m
1 stop
$878Turkish Airlines
Wed, Sep 16 - Wed, Sep 23
Multiple Airlines Logo
8:00 am - 12:20 am
SEA
-
STN
32h 20m
3 stops
Multiple Airlines Logo
6:30 am - 9:40 am
STN
-
SEA
35h 10m
3 stops
$880Multiple Airlines
Mon, Sep 7 - Wed, Sep 16
Multiple Airlines Logo
7:00 pm - 10:35 pm
SEA
-
STN
19h 35m
2 stops
Multiple Airlines Logo
6:05 am - 8:40 pm
STN
-
SEA
22h 35m
2 stops
$881Multiple Airlines
Thu, Jul 16 - Mon, Jul 27
Multiple Airlines Logo
5:40 pm - 6:20 pm
SEA
-
STN
16h 40m
2 stops
Multiple Airlines Logo
6:05 am - 3:40 pm
STN
-
SEA
17h 35m
2 stops
$882Multiple Airlines
Sun, Sep 13 - Wed, Sep 30

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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
Oct 1
SEA7:15 pmSeattle/Tacoma Intl
30h 40m
1 stop
STN9:55 amLondon Stansted
Oct 6
STN5:35 pmLondon Stansted
31h 45m
1 stop
SEA5:20 pmSeattle/Tacoma Intl
$875
Turkish Airlines
Sep 16
SEA7:15 pmSeattle/Tacoma Intl
18h 55m
1 stop
STN10:10 pmLondon Stansted
Sep 23
STN5:45 pmLondon Stansted
31h 35m
1 stop
SEA5:20 pmSeattle/Tacoma Intl
$878
Turkish Airlines
Oct 14
SEA7:15 pmSeattle/Tacoma Intl
18h 55m
1 stop
STN10:10 pmLondon Stansted
Oct 28
STN10:55 amLondon Stansted
38h 15m
1 stop
SEA6:10 pmSeattle/Tacoma Intl
$894

Lufthansa flights from Seattle to London Stansted Airport

Our best Lufthansa deals on Seattle to London Stansted Airport flight tickets
Lufthansa
Sep 21
SEA7:00 amSeattle/Tacoma Intl
19h 10m
2 stops
STN10:10 amLondon Stansted
Sep 28
STN4:25 pmLondon Stansted
32h 34m
1 stop
SEA4:59 pmSeattle/Tacoma Intl
$872
Lufthansa
Sep 16
SEA6:50 pmSeattle/Tacoma Intl
12h 45m
1 stop
STN3:35 pmLondon Stansted
Sep 27
STN10:15 amLondon Stansted
14h 44m
1 stop
SEA4:59 pmSeattle/Tacoma Intl
$885
Lufthansa
Sep 17
SEA6:50 pmSeattle/Tacoma Intl
13h 20m
1 stop
STN4:10 pmLondon Stansted
Sep 30
STN11:00 amLondon Stansted
13h 59m
1 stop
SEA4:59 pmSeattle/Tacoma Intl
$906

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 13, 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

Sun 9/6

7:00 pm-11:20 pm

2 stops20h 20m

London Stansted

Sat 9/12

11:25 am-8:40 pm

2 stops17h 15m

$871

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Mon 9/21

7:00 am-10:10 am

2 stops19h 10m

London Stansted

Mon 9/28

4:25 pm-4:59 pm

1 stop32h 34m

$872

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Sun 7/19

3:40 pm-11:20 pm

2 stops23h 40m

London Stansted

Thu 7/23

10:05 pm-9:00 pm

3 stops30h 55m

$874

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Thu 10/1

7:15 pm-9:55 am

1 stop30h 40m

London Stansted

Tue 10/6

5:35 pm-5:20 pm

1 stop31h 45m

$875

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Sun 7/12

7:00 pm-9:45 pm

2 stops18h 45m

London Stansted

Thu 7/16

6:30 am-9:40 am

3 stops35h 10m

$876

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Wed 7/29

3:40 pm-11:20 pm

2 stops23h 40m

London Stansted

Wed 8/5

6:30 am-9:40 am

3 stops35h 10m

$877

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Wed 9/16

7:15 pm-10:10 pm

1 stop18h 55m

London Stansted

Wed 9/23

5:45 pm-5:20 pm

1 stop31h 35m

$878

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Mon 9/7

8:00 am-12:20 am

3 stops32h 20m

London Stansted

Wed 9/16

6:30 am-9:40 am

3 stops35h 10m

$880

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Thu 7/16

7:00 pm-10:35 pm

2 stops19h 35m

London Stansted

Mon 7/27

6:05 am-8:40 pm

2 stops22h 35m

$881
Quickest round-trip

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Sun 9/13

5:40 pm-6:20 pm

2 stops16h 40m

London Stansted

Wed 9/30

6:05 am-3:40 pm

2 stops17h 35m

$882

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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

17h 25m

Direct flights

None
The fastest flight from Seattle to London Stansted Airport takes 17h 25m
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 17h 25m, 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
Harrow
Slough
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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