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Cheap flights from Seattle to London from $445

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 7/31. 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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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 - 8:35 pm
SEA
-
STN
20h 55m
2 stops
Multiple Airlines Logo
6:30 am - 9:40 am
STN
-
SEA
35h 10m
2 stops
$883Multiple Airlines
Tue, Aug 18 - Tue, Aug 25
Multiple Airlines Logo
3:40 pm - 12:20 am
SEA
-
STN
24h 40m
2 stops
Multiple Airlines Logo
8:05 am - 9:40 am
STN
-
SEA
33h 35m
2 stops
$886Multiple Airlines
Mon, Jun 1 - 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
$889Turkish Airlines
Fri, Sep 18 - Mon, Sep 21
Multiple Airlines Logo
3:40 pm - 6:50 pm
SEA
-
STN
19h 10m
2 stops
Multiple Airlines Logo
1:15 pm - 11:45 am
STN
-
SEA
30h 30m
2 stops
$890Multiple Airlines
Mon, Jun 8 - Sun, Jun 14
Multiple Airlines Logo
7:10 pm - 11:20 pm
SEA
-
STN
20h 10m
1 stop
Multiple Airlines Logo
8:15 pm - 5:10 pm
STN
-
SEA
28h 55m
2 stops
$894Multiple Airlines
Tue, Aug 18 - Tue, Aug 25
Multiple Airlines Logo
3:55 pm - 3:25 pm
SEA
-
STN
15h 30m
1 stop
Multiple Airlines Logo
5:55 am - 1:45 pm
STN
-
SEA
15h 50m
1 stop
$897Multiple Airlines
Fri, Jun 5 - Sat, Jun 13
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
Multiple Airlines Logo
3:55 pm - 5:15 pm
SEA
-
STN
17h 20m
1 stop
Multiple Airlines Logo
5:55 am - 1:45 pm
STN
-
SEA
15h 50m
1 stop
$900Multiple Airlines
Sun, Jun 7 - Sat, Jun 13
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
10:30 am - 10:25 pm
SEA
-
STN
27h 55m
3 stops
Multiple Airlines Logo
6:30 am - 9:40 am
STN
-
SEA
35h 10m
3 stops
$902Multiple Airlines
Thu, Jun 11 - Thu, Jun 18

Turkish Airlines flights from Seattle to London Stansted Airport

Our best Turkish Airlines deals on Seattle to London Stansted Airport flight tickets
Turkish Airlines
Sep 18
SEA7:15 pmSeattle/Tacoma Intl
37h 25m
1 stop
STN4:40 pmLondon Stansted
Sep 21
STN10:50 amLondon Stansted
38h 30m
1 stop
SEA5:20 pmSeattle/Tacoma Intl
$889
Turkish Airlines
Sep 9
SEA7:15 pmSeattle/Tacoma Intl
18h 55m
1 stop
STN10:10 pmLondon Stansted
Sep 16
STN6:55 amLondon Stansted
18h 25m
1 stop
SEA5:20 pmSeattle/Tacoma Intl
$910
Turkish Airlines
Sep 12
SEA12:35 pmSeattle/Tacoma Intl
20h 05m
1 stop
STN4:40 pmLondon Stansted
Sep 26
STN5:45 pmLondon Stansted
31h 35m
1 stop
SEA5:20 pmSeattle/Tacoma Intl
$912

Lufthansa flights from Seattle to London Stansted Airport

Our best Lufthansa deals on Seattle to London Stansted Airport flight tickets
Lufthansa
Sep 22
SEA6:50 pmSeattle/Tacoma Intl
12h 45m
1 stop
STN3:35 pmLondon Stansted
Sep 30
STN11:00 amLondon Stansted
13h 59m
1 stop
SEA4:59 pmSeattle/Tacoma Intl
$903
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 18, 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 8/18

3:40 pm-8:35 pm

2 stops20h 55m

London Stansted

Tue 8/25

6:30 am-9:40 am

2 stops35h 10m

$883

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Mon 6/1

3:40 pm-12:20 am

2 stops24h 40m

London Stansted

Sat 6/6

8:05 am-9:40 am

2 stops33h 35m

$886

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Fri 9/18

7:15 pm-4:40 pm

1 stop37h 25m

London Stansted

Mon 9/21

10:50 am-5:20 pm

1 stop38h 30m

$889

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Mon 6/8

3:40 pm-6:50 pm

2 stops19h 10m

London Stansted

Sun 6/14

1:15 pm-11:45 am

2 stops30h 30m

$890

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Tue 8/18

7:10 pm-11:20 pm

1 stop20h 10m

London Stansted

Tue 8/25

8:15 pm-5:10 pm

2 stops28h 55m

$894
Quickest round-trip

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Fri 6/5

3:55 pm-3:25 pm

1 stop15h 30m

London Stansted

Sat 6/13

5:55 am-1:45 pm

1 stop15h 50m

$897

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

Sun 6/7

3:55 pm-5:15 pm

1 stop17h 20m

London Stansted

Sat 6/13

5:55 am-1:45 pm

1 stop15h 50m

$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

Thu 6/11

10:30 am-10:25 pm

3 stops27h 55m

London Stansted

Thu 6/18

6:30 am-9:40 am

3 stops35h 10m

$902

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

19h 10m

Direct flights

None
The fastest flight from Seattle to London Stansted Airport takes 19h 10m
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 19h 10m, 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
Cobham
Folkestone
Romford
Uxbridge
Guildford

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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