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Cheap flights from Seattle to London from $375

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 7/25. 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
7:00 pm - 12:30 am
SEA
-
STN
21h 30m
2 stops
Multiple Airlines Logo
8:15 am - 10:58 pm
STN
-
SEA
22h 43m
3 stops
$563Multiple Airlines
Thu, Apr 16 - Thu, Apr 23
Multiple Airlines Logo
3:40 pm - 12:20 am
SEA
-
STN
24h 40m
2 stops
Multiple Airlines Logo
7:05 am - 4:00 pm
STN
-
SEA
16h 55m
2 stops
$579Multiple Airlines
Mon, May 4 - Tue, May 12
Multiple Airlines Logo
3:40 pm - 5:15 pm
SEA
-
STN
17h 35m
2 stops
Multiple Airlines Logo
9:40 pm - 8:40 pm
STN
-
SEA
31h 00m
2 stops
$583Multiple Airlines
Sun, Apr 19 - Sat, Apr 25
Multiple Airlines Logo
3:40 pm - 7:15 pm
SEA
-
STN
19h 35m
2 stops
Multiple Airlines Logo
6:45 am - 9:40 am
STN
-
SEA
34h 55m
2 stops
$584Multiple Airlines
Mon, Apr 20 - Sat, Jun 6
Multiple Airlines Logo
7:00 pm - 9:10 pm
SEA
-
STN
18h 10m
2 stops
Multiple Airlines Logo
9:40 pm - 8:40 pm
STN
-
SEA
31h 00m
2 stops
$589Multiple Airlines
Fri, Apr 24 - Sat, May 2
Multiple Airlines Logo
8:00 am - 4:50 pm
SEA
-
STN
24h 50m
2 stops
Multiple Airlines Logo
7:10 am - 10:53 pm
STN
-
SEA
23h 43m
3 stops
$591Multiple Airlines
Mon, Apr 6 - Tue, Apr 14
Multiple Airlines Logo
8:00 am - 2:35 pm
SEA
-
STN
22h 35m
2 stops
Multiple Airlines Logo
7:10 am - 10:53 pm
STN
-
SEA
23h 43m
3 stops
$593Multiple Airlines
Tue, Apr 7 - Tue, Apr 14
Multiple Airlines Logo
8:00 am - 2:35 pm
SEA
-
STN
22h 35m
2 stops
Multiple Airlines Logo
7:00 am - 10:53 pm
STN
-
SEA
23h 53m
3 stops
$594Multiple Airlines
Tue, Apr 7 - Wed, Apr 15
Multiple Airlines Logo
8:00 am - 2:35 pm
SEA
-
STN
22h 35m
2 stops
Multiple Airlines Logo
7:10 am - 10:53 pm
STN
-
SEA
23h 43m
3 stops
$595Multiple Airlines
Tue, Apr 7 - Tue, Apr 14
Multiple Airlines Logo
3:40 pm - 7:50 pm
SEA
-
STN
20h 10m
2 stops
Multiple Airlines Logo
7:15 am - 8:40 pm
STN
-
SEA
21h 25m
2 stops
$596Multiple Airlines
Tue, Apr 14 - Tue, Apr 21

Turkish Airlines flights from Seattle to London Stansted Airport

Our best Turkish Airlines deals on Seattle to London Stansted Airport flight tickets
Turkish Airlines
Mar 19
SEA8:00 pmSeattle/Tacoma Intl
30h 50m
1 stop
STN9:50 amLondon Stansted
Apr 8
STN5:45 pmLondon Stansted
31h 30m
1 stop
SEA5:15 pmSeattle/Tacoma Intl
$749
Turkish Airlines
Mar 16
SEA8:00 pmSeattle/Tacoma Intl
30h 50m
1 stop
STN9:50 amLondon Stansted
Apr 5
STN5:35 pmLondon Stansted
31h 40m
1 stop
SEA5:15 pmSeattle/Tacoma Intl
$845
Turkish Airlines
Mar 17
SEA8:00 pmSeattle/Tacoma Intl
37h 20m
1 stop
STN4:20 pmLondon Stansted
Apr 6
STN10:50 amLondon Stansted
38h 25m
1 stop
SEA5:15 pmSeattle/Tacoma Intl
$880

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 March 5, 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

Thu 4/16

7:00 pm-12:30 am

2 stops21h 30m

London Stansted

Thu 4/23

8:15 am-10:58 pm

3 stops22h 43m

$563
Quickest round-trip

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Mon 5/4

3:40 pm-12:20 am

2 stops24h 40m

London Stansted

Tue 5/12

7:05 am-4:00 pm

2 stops16h 55m

$579

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Sun 4/19

3:40 pm-5:15 pm

2 stops17h 35m

London Stansted

Sat 4/25

9:40 pm-8:40 pm

2 stops31h 00m

$583

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Mon 4/20

3:40 pm-7:15 pm

2 stops19h 35m

London Stansted

Sat 6/6

6:45 am-9:40 am

2 stops34h 55m

$584

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Fri 4/24

7:00 pm-9:10 pm

2 stops18h 10m

London Stansted

Sat 5/2

9:40 pm-8:40 pm

2 stops31h 00m

$589

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Mon 4/6

8:00 am-4:50 pm

2 stops24h 50m

London Stansted

Tue 4/14

7:10 am-10:53 pm

3 stops23h 43m

$591

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Tue 4/7

8:00 am-2:35 pm

2 stops22h 35m

London Stansted

Tue 4/14

7:10 am-10:53 pm

3 stops23h 43m

$593

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Tue 4/7

8:00 am-2:35 pm

2 stops22h 35m

London Stansted

Wed 4/15

7:00 am-10:53 pm

3 stops23h 53m

$594

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Tue 4/7

8:00 am-2:35 pm

2 stops22h 35m

London Stansted

Tue 4/14

7:10 am-10:53 pm

3 stops23h 43m

$595

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Tue 4/14

3:40 pm-7:50 pm

2 stops20h 10m

London Stansted

Tue 4/21

7:15 am-8:40 pm

2 stops21h 25m

$596

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

12h 45m

Direct flights

None
The fastest flight from Seattle to London Stansted Airport takes 12h 45m
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

  • 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 12h 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
Gatwick
Hounslow
Milton Keynes
Luton
Dover
Slough
Crawley
Hayes
Wembley
Dartford
Croydon
Brentwood
Harrow
Watford
Guildford
Stansted
Cobham
Folkestone
Romford
Richmond

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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