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Cheap flights from Seattle to London from $427

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 5/21. 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
8:00 am - 11:20 pm
SEA
-
STN
31h 20m
3 stops
Multiple Airlines Logo
10:05 pm - 12:20 pm
STN
-
SEA
22h 15m
2 stops
$746Multiple Airlines
Sun, May 3 - Thu, May 7
Multiple Airlines Logo
3:40 pm - 11:20 pm
SEA
-
STN
23h 40m
2 stops
Multiple Airlines Logo
10:00 pm - 9:40 am
STN
-
SEA
43h 40m
3 stops
$747Multiple Airlines
Sun, May 10 - Fri, May 15
Multiple Airlines Logo
3:40 pm - 12:50 am
SEA
-
STN
25h 10m
3 stops
Multiple Airlines Logo
10:00 pm - 9:40 am
STN
-
SEA
43h 40m
3 stops
$748Multiple Airlines
Sun, May 10 - Fri, May 15
Multiple Airlines Logo
3:40 pm - 10:55 pm
SEA
-
STN
23h 15m
2 stops
Multiple Airlines Logo
10:00 pm - 9:40 am
STN
-
SEA
43h 40m
3 stops
$759Multiple Airlines
Thu, Jun 4 - Tue, Jun 16
Multiple Airlines Logo
3:40 pm - 7:45 pm
SEA
-
STN
20h 05m
2 stops
Multiple Airlines Logo
6:35 am - 6:45 pm
STN
-
SEA
44h 10m
3 stops
$760Multiple Airlines
Wed, Apr 29 - Fri, May 15
Multiple Airlines Logo
3:40 pm - 12:20 am
SEA
-
STN
24h 40m
2 stops
Multiple Airlines Logo
6:35 am - 9:00 pm
STN
-
SEA
22h 25m
2 stops
$766Multiple Airlines
Mon, Jun 8 - Fri, Jun 19
Multiple Airlines Logo
3:40 pm - 10:25 pm
SEA
-
STN
22h 45m
2 stops
Multiple Airlines Logo
10:00 pm - 9:40 am
STN
-
SEA
43h 40m
3 stops
$767Multiple Airlines
Mon, May 4 - Sun, May 17
Multiple Airlines Logo
7:00 pm - 7:45 pm
SEA
-
STN
16h 45m
2 stops
Multiple Airlines Logo
8:30 am - 9:08 pm
STN
-
SEA
20h 38m
2 stops
$768Multiple Airlines
Wed, Apr 29 - Wed, May 6
Multiple Airlines Logo
6:50 pm - 11:20 pm
SEA
-
STN
20h 30m
2 stops
Multiple Airlines Logo
8:25 pm - 10:40 pm
STN
-
SEA
34h 15m
3 stops
$769Multiple Airlines
Sun, May 3 - Fri, May 8
Multiple Airlines Logo
3:40 pm - 11:55 pm
SEA
-
STN
24h 15m
3 stops
Multiple Airlines Logo
6:35 am - 9:40 am
STN
-
SEA
35h 05m
3 stops
$770Multiple Airlines
Mon, May 4 - Fri, May 8

Turkish Airlines flights from Seattle to London Stansted Airport

Our best Turkish Airlines deals on Seattle to London Stansted Airport flight tickets
Turkish Airlines
May 5
SEA7:10 pmSeattle/Tacoma Intl
37h 30m
1 stop
STN4:40 pmLondon Stansted
May 19
STN6:55 amLondon Stansted
18h 20m
1 stop
SEA5:15 pmSeattle/Tacoma Intl
$831
Turkish Airlines
May 4
SEA7:10 pmSeattle/Tacoma Intl
19h 00m
1 stop
STN10:10 pmLondon Stansted
May 11
STN10:50 amLondon Stansted
38h 25m
1 stop
SEA5:15 pmSeattle/Tacoma Intl
$880
Turkish Airlines
May 4
SEA7:10 pmSeattle/Tacoma Intl
19h 00m
1 stop
STN10:10 pmLondon Stansted
May 9
STN10:50 amLondon Stansted
38h 25m
1 stop
SEA5:15 pmSeattle/Tacoma Intl
$886

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 April 27, 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 5/3

8:00 am-11:20 pm

3 stops31h 20m

London Stansted

Thu 5/7

10:05 pm-12:20 pm

2 stops22h 15m

$746

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Sun 5/10

3:40 pm-11:20 pm

2 stops23h 40m

London Stansted

Fri 5/15

10:00 pm-9:40 am

3 stops43h 40m

$747

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Sun 5/10

3:40 pm-12:50 am

3 stops25h 10m

London Stansted

Fri 5/15

10:00 pm-9:40 am

3 stops43h 40m

$748

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Thu 6/4

3:40 pm-10:55 pm

2 stops23h 15m

London Stansted

Tue 6/16

10:00 pm-9:40 am

3 stops43h 40m

$759

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Wed 4/29

3:40 pm-7:45 pm

2 stops20h 05m

London Stansted

Fri 5/15

6:35 am-6:45 pm

3 stops44h 10m

$760

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Mon 6/8

3:40 pm-12:20 am

2 stops24h 40m

London Stansted

Fri 6/19

6:35 am-9:00 pm

2 stops22h 25m

$766

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Mon 5/4

3:40 pm-10:25 pm

2 stops22h 45m

London Stansted

Sun 5/17

10:00 pm-9:40 am

3 stops43h 40m

$767
Quickest round-trip

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Wed 4/29

7:00 pm-7:45 pm

2 stops16h 45m

London Stansted

Wed 5/6

8:30 am-9:08 pm

2 stops20h 38m

$768

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Sun 5/3

6:50 pm-11:20 pm

2 stops20h 30m

London Stansted

Fri 5/8

8:25 pm-10:40 pm

3 stops34h 15m

$769

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Mon 5/4

3:40 pm-11:55 pm

3 stops24h 15m

London Stansted

Fri 5/8

6:35 am-9:40 am

3 stops35h 05m

$770

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

15h 45m

Direct flights

None
The fastest flight from Seattle to London Stansted Airport takes 15h 45m
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 15h 45m, 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
Slough
Wembley
Stansted
Watford
Croydon
Uxbridge
Brentwood
Dartford
Cobham
Folkestone
Romford
Harrow
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.

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