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Cheap flights from Seattle to London from $370

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 7/10. 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
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
5:45 am - 10:50 pm
SEA
-
STN
33h 05m
3 stops
Multiple Airlines Logo
9:05 am - 9:40 am
STN
-
SEA
32h 35m
2 stops
$899Multiple Airlines
Wed, Jun 3 - Sat, Jun 6
Turkish Airlines Logo
7:15 pm - 4:40 pm
SEA
-
STN
37h 25m
1 stop
Turkish Airlines Logo
10:50 am - 5:20 pm
STN
-
SEA
38h 30m
1 stop
$900Turkish Airlines
Tue, Aug 18 - Wed, Sep 30
Multiple Airlines Logo
5:45 am - 2:50 pm
SEA
-
STN
25h 05m
3 stops
Multiple Airlines Logo
7:00 am - 9:00 pm
STN
-
SEA
22h 00m
3 stops
$901Multiple Airlines
Mon, Aug 10 - Wed, Sep 2
Multiple Airlines Logo
7:00 pm - 9:40 pm
SEA
-
STN
18h 40m
2 stops
Multiple Airlines Logo
6:30 am - 6:45 pm
STN
-
SEA
44h 15m
3 stops
$902Multiple Airlines
Wed, Oct 7 - Mon, Oct 12
Turkish Airlines Logo
7:15 pm - 10:10 pm
SEA
-
STN
18h 55m
1 stop
Turkish Airlines Logo
5:35 pm - 5:20 pm
STN
-
SEA
31h 45m
1 stop
$903Turkish Airlines
Sun, Oct 4 - Tue, Oct 20
Multiple Airlines Logo
7:00 pm - 12:10 am
SEA
-
STN
21h 10m
2 stops
Multiple Airlines Logo
8:30 am - 9:04 pm
STN
-
SEA
20h 34m
2 stops
$904Multiple Airlines
Tue, Oct 13 - Wed, Oct 21
Multiple Airlines Logo
3:55 pm - 2:35 pm
SEA
-
STN
14h 40m
1 stop
Multiple Airlines Logo
6:20 am - 1:45 pm
STN
-
SEA
15h 25m
1 stop
$905Multiple Airlines
Tue, Jul 21 - Fri, Aug 7
Multiple Airlines Logo
7:00 pm - 10:55 pm
SEA
-
STN
19h 55m
2 stops
Multiple Airlines Logo
7:00 am - 5:55 pm
STN
-
SEA
18h 55m
2 stops
$906Multiple Airlines
Thu, Aug 6 - Wed, Aug 19
Multiple Airlines Logo
3:40 pm - 10:30 pm
SEA
-
STN
22h 50m
3 stops
Multiple Airlines Logo
8:15 am - 8:40 pm
STN
-
SEA
20h 25m
2 stops
$907Multiple Airlines
Wed, Sep 9 - Thu, Sep 24
Lufthansa Logo
6:50 pm - 3:35 pm
SEA
-
STN
12h 45m
1 stop
Lufthansa Logo
11:00 am - 4:59 pm
STN
-
SEA
13h 59m
1 stop
$908Lufthansa
Wed, Sep 16 - Tue, Sep 29

Turkish Airlines flights from Seattle to London Stansted Airport

Our best Turkish Airlines deals on Seattle to London Stansted Airport flight tickets
Turkish Airlines
Aug 18
SEA7:15 pmSeattle/Tacoma Intl
37h 25m
1 stop
STN4:40 pmLondon Stansted
Sep 30
STN10:50 amLondon Stansted
38h 30m
1 stop
SEA5:20 pmSeattle/Tacoma Intl
$900
Turkish Airlines
Oct 4
SEA7:15 pmSeattle/Tacoma Intl
18h 55m
1 stop
STN10:10 pmLondon Stansted
Oct 20
STN5:35 pmLondon Stansted
31h 45m
1 stop
SEA5:20 pmSeattle/Tacoma Intl
$903
Turkish Airlines
Nov 12
SEA7:00 pmSeattle/Tacoma Intl
37h 20m
1 stop
STN4:20 pmLondon Stansted
Nov 16
STN10:50 amLondon Stansted
38h 15m
1 stop
SEA5:05 pmSeattle/Tacoma Intl
$920

Lufthansa flights from Seattle to London Stansted Airport

Our best Lufthansa deals on Seattle to London Stansted Airport flight tickets
Lufthansa
Sep 16
SEA6:50 pmSeattle/Tacoma Intl
12h 45m
1 stop
STN3:35 pmLondon Stansted
Sep 29
STN11:00 amLondon Stansted
13h 59m
1 stop
SEA4:59 pmSeattle/Tacoma Intl
$908
Lufthansa
Sep 16
SEA6:50 pmSeattle/Tacoma Intl
12h 45m
1 stop
STN3:35 pmLondon Stansted
Oct 1
STN4:25 pmLondon Stansted
32h 34m
1 stop
SEA4:59 pmSeattle/Tacoma Intl
$918

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 May 20, 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

Wed 6/3

5:45 am-10:50 pm

3 stops33h 05m

London Stansted

Sat 6/6

9:05 am-9:40 am

2 stops32h 35m

$899

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Tue 8/18

7:15 pm-4:40 pm

1 stop37h 25m

London Stansted

Wed 9/30

10:50 am-5:20 pm

1 stop38h 30m

$900

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Mon 8/10

5:45 am-2:50 pm

3 stops25h 05m

London Stansted

Wed 9/2

7:00 am-9:00 pm

3 stops22h 00m

$901

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Wed 10/7

7:00 pm-9:40 pm

2 stops18h 40m

London Stansted

Mon 10/12

6:30 am-6:45 pm

3 stops44h 15m

$902

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Sun 10/4

7:15 pm-10:10 pm

1 stop18h 55m

London Stansted

Tue 10/20

5:35 pm-5:20 pm

1 stop31h 45m

$903

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Tue 10/13

7:00 pm-12:10 am

2 stops21h 10m

London Stansted

Wed 10/21

8:30 am-9:04 pm

2 stops20h 34m

$904

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Tue 7/21

3:55 pm-2:35 pm

1 stop14h 40m

London Stansted

Fri 8/7

6:20 am-1:45 pm

1 stop15h 25m

$905

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Thu 8/6

7:00 pm-10:55 pm

2 stops19h 55m

London Stansted

Wed 8/19

7:00 am-5:55 pm

2 stops18h 55m

$906

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Wed 9/9

3:40 pm-10:30 pm

3 stops22h 50m

London Stansted

Thu 9/24

8:15 am-8:40 pm

2 stops20h 25m

$907
Quickest round-trip

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Wed 9/16

6:50 pm-3:35 pm

1 stop12h 45m

London Stansted

Tue 9/29

11:00 am-4:59 pm

1 stop13h 59m

$908

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

16h 25m

Direct flights

None
The fastest flight from Seattle to London Stansted Airport takes 16h 25m
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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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 16h 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
Dover
Luton
Hayes
Crawley
Wembley
Slough
Croydon
Stansted
Watford
Harrow
Brentwood
Dartford
Ilford
Cobham
Folkestone
Uxbridge
Romford

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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