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Cheap flights from Seattle to London from $380

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 4/11. 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 - 10:25 pm
SEA
-
STN
22h 45m
2 stops
Multiple Airlines Logo
6:30 am - 9:40 am
STN
-
SEA
35h 10m
3 stops
$558Multiple Airlines
Mon, Apr 20 - Mon, Apr 27
Multiple Airlines Logo
3:40 pm - 10:35 pm
SEA
-
STN
22h 55m
2 stops
Multiple Airlines Logo
6:30 am - 9:35 am
STN
-
SEA
35h 05m
3 stops
$560Multiple Airlines
Thu, Apr 16 - Wed, Apr 29
Multiple Airlines Logo
7:00 pm - 9:10 pm
SEA
-
STN
18h 10m
2 stops
Multiple Airlines Logo
3:10 pm - 5:55 pm
STN
-
SEA
34h 45m
2 stops
$569Multiple Airlines
Fri, Apr 17 - Fri, Apr 24
Multiple Airlines Logo
7:00 pm - 11:50 pm
SEA
-
STN
20h 50m
2 stops
Multiple Airlines Logo
6:30 am - 9:35 am
STN
-
SEA
35h 05m
3 stops
$572Multiple Airlines
Sun, Apr 5 - Tue, Apr 14
Multiple Airlines Logo
7:00 pm - 10:50 pm
SEA
-
STN
19h 50m
2 stops
Multiple Airlines Logo
10:45 pm - 9:35 am
STN
-
SEA
42h 50m
3 stops
$580Multiple Airlines
Mon, Apr 6 - Mon, Apr 13
Multiple Airlines Logo
7:00 pm - 10:50 pm
SEA
-
STN
19h 50m
2 stops
Multiple Airlines Logo
10:45 pm - 9:35 am
STN
-
SEA
42h 50m
3 stops
$581Multiple Airlines
Mon, Apr 6 - Mon, Apr 13
Multiple Airlines Logo
7:00 pm - 12:30 am
SEA
-
STN
21h 30m
2 stops
Multiple Airlines Logo
6:30 am - 9:35 am
STN
-
SEA
35h 05m
3 stops
$586Multiple Airlines
Thu, Apr 16 - Wed, Apr 29
Multiple Airlines Logo
7:00 pm - 12:30 am
SEA
-
STN
21h 30m
3 stops
Multiple Airlines Logo
6:30 am - 9:35 am
STN
-
SEA
35h 05m
3 stops
$587Multiple Airlines
Thu, Apr 16 - Wed, Apr 29
Multiple Airlines Logo
7:00 pm - 11:15 pm
SEA
-
STN
20h 15m
2 stops
Multiple Airlines Logo
6:30 am - 9:35 am
STN
-
SEA
35h 05m
3 stops
$589Multiple Airlines
Sat, Apr 25 - Wed, Apr 29
Multiple Airlines Logo
3:40 pm - 10:25 pm
SEA
-
STN
22h 45m
2 stops
Multiple Airlines Logo
6:30 am - 9:53 pm
STN
-
SEA
23h 23m
2 stops
$596Multiple Airlines
Mon, Apr 20 - Wed, Apr 29

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 February 23, 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

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Mon 4/20

3:40 pm-10:25 pm

2 stops22h 45m

London Stansted

Mon 4/27

6:30 am-9:40 am

3 stops35h 10m

$558

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Thu 4/16

3:40 pm-10:35 pm

2 stops22h 55m

London Stansted

Wed 4/29

6:30 am-9:35 am

3 stops35h 05m

$560

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Fri 4/17

7:00 pm-9:10 pm

2 stops18h 10m

London Stansted

Fri 4/24

3:10 pm-5:55 pm

2 stops34h 45m

$569

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Sun 4/5

7:00 pm-11:50 pm

2 stops20h 50m

London Stansted

Tue 4/14

6:30 am-9:35 am

3 stops35h 05m

$572

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Mon 4/6

7:00 pm-10:50 pm

2 stops19h 50m

London Stansted

Mon 4/13

10:45 pm-9:35 am

3 stops42h 50m

$580

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Mon 4/6

7:00 pm-10:50 pm

2 stops19h 50m

London Stansted

Mon 4/13

10:45 pm-9:35 am

3 stops42h 50m

$581

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Thu 4/16

7:00 pm-12:30 am

2 stops21h 30m

London Stansted

Wed 4/29

6:30 am-9:35 am

3 stops35h 05m

$586

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Thu 4/16

7:00 pm-12:30 am

3 stops21h 30m

London Stansted

Wed 4/29

6:30 am-9:35 am

3 stops35h 05m

$587

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Sat 4/25

7:00 pm-11:15 pm

2 stops20h 15m

London Stansted

Wed 4/29

6:30 am-9:35 am

3 stops35h 05m

$589

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Mon 4/20

3:40 pm-10:25 pm

2 stops22h 45m

London Stansted

Wed 4/29

6:30 am-9:53 pm

2 stops23h 23m

$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
Brentwood
Croydon
Guildford
Harrow
Watford
Cobham
Folkestone
Romford
Stansted
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.

An easier way to manage your London Stansted Airport trip

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