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Cheap flights from London Stansted Airport to Seattle from £417

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Stansted Airport to Seattle departing on 23/8. 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
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Find the cheapest flights from London Stansted Airport to Seattle

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
22:45 - 21:00
STN
-
SEA
30h 15m
3 stops
Multiple Airlines Logo
19:00 - 18:50
SEA
-
STN
15h 50m
2 stops
£495Multiple Airlines
Wed, 26 Aug - Mon, 31 Aug
Multiple Airlines Logo
22:45 - 21:00
STN
-
SEA
30h 15m
3 stops
Multiple Airlines Logo
19:00 - 22:50
SEA
-
STN
19h 50m
2 stops
£496Multiple Airlines
Wed, 26 Aug - Mon, 31 Aug
Multiple Airlines Logo
22:45 - 21:00
STN
-
SEA
30h 15m
3 stops
Multiple Airlines Logo
19:00 - 18:50
SEA
-
STN
15h 50m
2 stops
£502Multiple Airlines
Wed, 26 Aug - Mon, 31 Aug
Multiple Airlines Logo
20:25 - 11:45
STN
-
SEA
23h 20m
2 stops
Multiple Airlines Logo
19:00 - 23:20
SEA
-
STN
20h 20m
2 stops
£508Multiple Airlines
Fri, 4 Sep - Sun, 6 Sep
Multiple Airlines Logo
22:00 - 21:00
STN
-
SEA
31h 00m
3 stops
Multiple Airlines Logo
19:00 - 22:05
SEA
-
STN
19h 05m
3 stops
£515Multiple Airlines
Wed, 26 Aug - Mon, 31 Aug
Lufthansa Logo
16:25 - 16:59
STN
-
SEA
32h 34m
1 stop
Lufthansa Logo
18:50 - 15:35
SEA
-
STN
12h 45m
1 stop
£521Lufthansa
Wed, 23 Sep - Wed, 30 Sep
Multiple Airlines Logo
22:45 - 21:00
STN
-
SEA
30h 15m
3 stops
Multiple Airlines Logo
19:00 - 22:05
SEA
-
STN
19h 05m
3 stops
£522Multiple Airlines
Wed, 26 Aug - Mon, 31 Aug
Lufthansa Logo
11:00 - 16:59
STN
-
SEA
13h 59m
1 stop
Lufthansa Logo
18:50 - 15:35
SEA
-
STN
12h 45m
1 stop
£523Lufthansa
Tue, 29 Sep - Sun, 4 Oct
Multiple Airlines Logo
22:00 - 21:00
STN
-
SEA
31h 00m
3 stops
Multiple Airlines Logo
19:00 - 22:05
SEA
-
STN
19h 05m
3 stops
£528Multiple Airlines
Wed, 26 Aug - Mon, 31 Aug
Multiple Airlines Logo
06:30 - 09:40
STN
-
SEA
35h 10m
3 stops
Multiple Airlines Logo
19:00 - 23:40
SEA
-
STN
20h 40m
2 stops
£535Multiple Airlines
Wed, 26 Aug - Sun, 6 Sep

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Lufthansa flights from London Stansted Airport to Seattle

Our best Lufthansa deals on London Stansted Airport to Seattle flight tickets
Lufthansa
23 Sept
STN16:25London Stansted
32h 34m
1 stop
SEA16:59Seattle/Tacoma Intl
30 Sept
SEA18:50Seattle/Tacoma Intl
12h 45m
1 stop
STN15:35London Stansted
£521
Lufthansa
29 Sept
STN11:00London Stansted
13h 59m
1 stop
SEA16:59Seattle/Tacoma Intl
4 Oct
SEA18:50Seattle/Tacoma Intl
12h 45m
1 stop
STN15:35London Stansted
£523
Lufthansa
17 Sept
STN16:25London Stansted
32h 34m
1 stop
SEA16:59Seattle/Tacoma Intl
3 Oct
SEA18:50Seattle/Tacoma Intl
31h 20m
1 stop
STN10:10London Stansted
£537

momondo Fare Finder

 
Customise your flight search to find flights from London Stansted Airport to Seattle 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 279,928 searches. Data last updated 19 July 2026.
Use the filters below to find and compare flights from London Stansted Airport to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSeattle

STN - SEA

STNSEA

London Stansted

Wed 26/8

22:45-21:00

3 stops30h 15m

Seattle/Tacoma Intl

Mon 31/8

19:00-18:50

2 stops15h 50m

£495

LondonSeattle

STN - SEA

STNSEA

London Stansted

Wed 26/8

22:45-21:00

3 stops30h 15m

Seattle/Tacoma Intl

Mon 31/8

19:00-22:50

2 stops19h 50m

£496

LondonSeattle

STN - SEA

STNSEA

London Stansted

Wed 26/8

22:45-21:00

3 stops30h 15m

Seattle/Tacoma Intl

Mon 31/8

19:00-18:50

2 stops15h 50m

£502

LondonSeattle

STN - SEA

STNSEA

London Stansted

Fri 4/9

20:25-11:45

2 stops23h 20m

Seattle/Tacoma Intl

Sun 6/9

19:00-23:20

2 stops20h 20m

£508

LondonSeattle

STN - SEA

STNSEA

London Stansted

Wed 26/8

22:00-21:00

3 stops31h 00m

Seattle/Tacoma Intl

Mon 31/8

19:00-22:05

3 stops19h 05m

£515

LondonSeattle

STN - SEA

STNSEA

London Stansted

Wed 23/9

16:25-16:59

1 stop32h 34m

Seattle/Tacoma Intl

Wed 30/9

18:50-15:35

1 stop12h 45m

£521

LondonSeattle

STN - SEA

STNSEA

London Stansted

Wed 26/8

22:45-21:00

3 stops30h 15m

Seattle/Tacoma Intl

Mon 31/8

19:00-22:05

3 stops19h 05m

£522
Fastest return journey

LondonSeattle

STN - SEA

STNSEA

London Stansted

Tue 29/9

11:00-16:59

1 stop13h 59m

Seattle/Tacoma Intl

Sun 4/10

18:50-15:35

1 stop12h 45m

£523

LondonSeattle

STN - SEA

STNSEA

London Stansted

Wed 26/8

22:00-21:00

3 stops31h 00m

Seattle/Tacoma Intl

Mon 31/8

19:00-22:05

3 stops19h 05m

£528

LondonSeattle

STN - SEA

STNSEA

London Stansted

Wed 26/8

06:30-09:40

3 stops35h 10m

Seattle/Tacoma Intl

Sun 6/9

19:00-23:40

2 stops20h 40m

£535

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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See travel insights to Seattle from

How to get the cheapest flight ticket from London Stansted Airport to Seattle

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 day to depart on your flight to Seattle?

According to our data, Thursday is the cheapest day to fly to Seattle from London Stansted Airport. The lowest ticket price found for a Thursday departure recently was £594. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Seattle on Sunday is £671.

What is the cheapest time of day to depart on your flight to Seattle?

According to our data, the cheapest time of day to fly to Seattle is at midday. momondo users have found flights departing from London Stansted Airport to Seattle at midday for as low as £597. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the morning are often more expensive, with an average ticket price of £631.

When to book flights from London Stansted Airport to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from London Stansted Airport to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London Stansted Airport to Seattle (STN to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Stansted Airport to Seattle

Fastest flight time

18h 35m

Direct flights

None
The fastest flight from London Stansted Airport to Seattle takes 18h 35m
There are no direct flights from London Stansted Airport to Seattle. There are no popular flight routes from London Stansted Airport to Seattle.
Search flight deals

Frequently asked questions about flying from London Stansted Airport to Seattle

  • How far is London Stansted to Seattle/Tacoma Intl by plane?

    A flight from London Stansted to Seattle/Tacoma Intl will travel around 4769.5 mi. Flights usually cover this in 18h 35m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from London Stansted Airport to Seattle/Tacoma Intl Airport?

    Prices for flights from London Stansted Airport to Seattle/Tacoma Intl Airport were last updated today.

  • How old do you have to be to fly from London Stansted Airport to Seattle/Tacoma Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from London Stansted Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Westport
Kirkland
Ashford
Tacoma
SeaTac
Tukwila
Fife

Why use momondo?

Why should I use momondo to find a flight deal from London to Seattle?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from London to Seattle. momondo saves you time and could save you money on your trip.

Can I find flights from London to Seattle with flexible booking policies on momondo?

All flight searches from London to Seattle on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from London to Seattle?

momondo helps you find the best flight between London and Seattle by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from London to Seattle right now. Can momondo alert me if prices change?

If you are not ready to book a flight from London to Seattle now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Seattle and let you know when they change.

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