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Cheap flights from Seattle to London from $283

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 10/5. 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
3:55 pm - 2:35 pm
SEA
-
STN
14h 40m
1 stop
Multiple Airlines Logo
7:10 am - 1:45 pm
STN
-
SEA
14h 35m
1 stop
$630Multiple Airlines
Tue, Sep 22 - Tue, Oct 6
Multiple Airlines Logo
2:35 pm - 9:35 pm
SEA
-
STN
23h 00m
2 stops
Multiple Airlines Logo
8:15 am - 5:00 pm
STN
-
SEA
16h 45m
2 stops
$632Multiple Airlines
Sun, Nov 15 - Sun, Nov 22
Multiple Airlines Logo
8:40 am - 3:30 pm
SEA
-
STN
22h 50m
3 stops
Multiple Airlines Logo
7:10 pm - 1:00 pm
STN
-
SEA
25h 50m
2 stops
$633Multiple Airlines
Sat, Nov 7 - Sat, Nov 14
Multiple Airlines Logo
7:00 pm - 12:50 am
SEA
-
STN
21h 50m
2 stops
Multiple Airlines Logo
5:55 am - 8:40 pm
STN
-
SEA
22h 45m
2 stops
$635Multiple Airlines
Fri, Sep 25 - Sun, Oct 11
Multiple Airlines Logo
3:55 pm - 3:25 pm
SEA
-
STN
15h 30m
1 stop
Multiple Airlines Logo
7:05 am - 1:45 pm
STN
-
SEA
14h 40m
1 stop
$642Multiple Airlines
Fri, Sep 25 - Sun, Oct 11
Multiple Airlines Logo
3:55 pm - 3:25 pm
SEA
-
STN
15h 30m
1 stop
Multiple Airlines Logo
7:05 am - 1:45 pm
STN
-
SEA
14h 40m
1 stop
$644Multiple Airlines
Fri, Oct 2 - Sun, Oct 11
Turkish Airlines Logo
12:35 pm - 9:55 am
SEA
-
STN
37h 20m
1 stop
Turkish Airlines Logo
5:35 pm - 5:20 pm
STN
-
SEA
31h 45m
1 stop
$852Turkish Airlines
Mon, Sep 7 - Tue, Sep 22
Turkish Airlines Logo
12:35 pm - 9:55 am
SEA
-
STN
37h 20m
1 stop
Turkish Airlines Logo
5:35 pm - 5:20 pm
STN
-
SEA
31h 45m
1 stop
$856Turkish Airlines
Mon, Sep 7 - Tue, Sep 22
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
$867Turkish Airlines
Wed, Oct 14 - Wed, Oct 21
Turkish Airlines Logo
7:15 pm - 4:40 pm
SEA
-
STN
37h 25m
1 stop
Turkish Airlines Logo
10:55 am - 5:10 pm
STN
-
SEA
38h 15m
1 stop
$867Turkish Airlines
Sun, Sep 13 - Wed, Nov 25

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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
Aug 12
SEA7:15 pmSeattle/Tacoma Intl
37h 25m
1 stop
STN4:40 pmLondon Stansted
Sep 23
STN10:50 amLondon Stansted
38h 30m
1 stop
SEA5:20 pmSeattle/Tacoma Intl
$1,179
Turkish Airlines
Aug 9
SEA7:15 pmSeattle/Tacoma Intl
37h 25m
1 stop
STN4:40 pmLondon Stansted
Aug 21
STN10:50 amLondon Stansted
31h 50m
1 stop
SEA10:40 amSeattle/Tacoma Intl
$1,210
Turkish Airlines
Aug 15
SEA7:15 pmSeattle/Tacoma Intl
30h 40m
1 stop
STN9:55 amLondon Stansted
Sep 19
STN10:50 amLondon Stansted
38h 30m
1 stop
SEA5:20 pmSeattle/Tacoma Intl
$1,214

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 August 2, 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
Quickest round-trip

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Tue 9/22

3:55 pm-2:35 pm

1 stop14h 40m

London Stansted

Tue 10/6

7:10 am-1:45 pm

1 stop14h 35m

$630

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Sun 11/15

2:35 pm-9:35 pm

2 stops23h 00m

London Stansted

Sun 11/22

8:15 am-5:00 pm

2 stops16h 45m

$632

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Sat 11/7

8:40 am-3:30 pm

3 stops22h 50m

London Stansted

Sat 11/14

7:10 pm-1:00 pm

2 stops25h 50m

$633

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Fri 9/25

7:00 pm-12:50 am

2 stops21h 50m

London Stansted

Sun 10/11

5:55 am-8:40 pm

2 stops22h 45m

$635

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Fri 9/25

3:55 pm-3:25 pm

1 stop15h 30m

London Stansted

Sun 10/11

7:05 am-1:45 pm

1 stop14h 40m

$642

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Fri 10/2

3:55 pm-3:25 pm

1 stop15h 30m

London Stansted

Sun 10/11

7:05 am-1:45 pm

1 stop14h 40m

$644

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Mon 9/7

12:35 pm-9:55 am

1 stop37h 20m

London Stansted

Tue 9/22

5:35 pm-5:20 pm

1 stop31h 45m

$852

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Mon 9/7

12:35 pm-9:55 am

1 stop37h 20m

London Stansted

Tue 9/22

5:35 pm-5:20 pm

1 stop31h 45m

$856

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Wed 10/14

7:15 pm-4:40 pm

1 stop37h 25m

London Stansted

Wed 10/21

10:50 am-5:20 pm

1 stop38h 30m

$867

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Sun 9/13

7:15 pm-4:40 pm

1 stop37h 25m

London Stansted

Wed 11/25

10:55 am-5:10 pm

1 stop38h 15m

$867

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?

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

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
Hayes
Dover
Croydon
Wembley
Stansted
Kingston upon Thames
Watford
Slough
Harrow
Cobham
Richmond
Uxbridge
Guildford
Worthing
Romford
Ilford

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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