What is the cheapest airline that flies from London Stansted to Seattle/Tacoma Intl?

Turkish Airlines is the most popular carrier operating from London Stansted to Seattle/Tacoma Intl

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 a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to 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 required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$572 Cheap Flights from London Stansted Airport to Seattle in 2026

Find the cheapest flights from London Stansted Airport to Seattle

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

10:45 pm - 9:00 pm

STN

SEA

30h 15m

3 stops

3:40 pm - 4:50 pm

SEA

STN

17h 10m

2 stops

$726Multiple Airlines

Wed, Aug 26 - Mon, Sep 7

8:45 pm - 9:04 pm

STN

SEA

32h 19m

3 stops

3:40 pm - 8:25 pm

SEA

STN

20h 45m

3 stops

$734Multiple Airlines

Mon, Sep 21 - Fri, Sep 25

7:05 am - 8:40 pm

STN

SEA

21h 35m

2 stops

3:40 pm - 12:20 am

SEA

STN

24h 40m

2 stops

$757Multiple Airlines

Tue, Aug 18 - Mon, Aug 31

6:30 am - 9:40 am

STN

SEA

35h 10m

3 stops

11:25 pm - 12:10 am

SEA

STN

16h 45m

2 stops

$765Multiple Airlines

Tue, Aug 18 - Tue, Sep 1

10:05 pm - 9:04 pm

STN

SEA

30h 59m

3 stops

3:40 pm - 7:15 pm

SEA

STN

19h 35m

2 stops

$768Multiple Airlines

Sun, Sep 13 - Mon, Sep 21

6:35 am - 10:07 am

STN

SEA

35h 32m

3 stops

7:00 pm - 12:50 am

SEA

STN

21h 50m

2 stops

$769Multiple Airlines

Sat, Sep 5 - Fri, Sep 18

6:30 am - 6:45 pm

STN

SEA

44h 15m

3 stops

3:40 pm - 7:55 pm

SEA

STN

20h 15m

2 stops

$773Multiple Airlines

Thu, Sep 10 - Sun, Sep 13

6:35 am - 6:45 pm

STN

SEA

44h 10m

3 stops

3:40 pm - 11:20 pm

SEA

STN

23h 40m

2 stops

$774Multiple Airlines

Sat, Sep 5 - Sun, Oct 4

6:30 am - 9:40 am

STN

SEA

35h 10m

3 stops

7:00 pm - 12:20 am

SEA

STN

21h 20m

2 stops

$775Multiple Airlines

Tue, Aug 18 - Mon, Aug 31

6:35 am - 9:00 pm

STN

SEA

46h 25m

3 stops

3:40 pm - 11:20 pm

SEA

STN

23h 40m

2 stops

$778Multiple Airlines

Sat, Sep 5 - Sun, Oct 4

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Turkish Airlines flights from London Stansted Airport to Seattle

Our best Turkish Airlines deals on London Stansted Airport to Seattle flight tickets

Turkish Airlines

Jun 17

STN5:45 pmLondon Stansted

31h 35m

1 stop

SEA5:20 pmSeattle/Tacoma Intl

Jul 17

SEA7:15 pmSeattle/Tacoma Intl

18h 55m

1 stop

STN10:10 pmLondon Stansted

$1,218

Turkish Airlines

Jun 11

STN5:35 pmLondon Stansted

31h 40m

1 stop

SEA5:15 pmSeattle/Tacoma Intl

Jul 5

SEA7:15 pmSeattle/Tacoma Intl

18h 55m

1 stop

STN10:10 pmLondon Stansted

$1,231

momondo Fare Finder

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 round-trip

LondonSeattle

STN - SEA

STNSEA

London Stansted

Wed 8/26

10:45 pm-9:00 pm

3 stops30h 15m

Seattle/Tacoma Intl

Mon 9/7

3:40 pm-4:50 pm

2 stops17h 10m

$726

LondonSeattle

STN - SEA

STNSEA

London Stansted

Mon 9/21

8:45 pm-9:04 pm

3 stops32h 19m

Seattle/Tacoma Intl

Fri 9/25

3:40 pm-8:25 pm

3 stops20h 45m

$734

Quickest round-trip

LondonSeattle

STN - SEA

STNSEA

London Stansted

Tue 8/18

7:05 am-8:40 pm

2 stops21h 35m

Seattle/Tacoma Intl

Mon 8/31

3:40 pm-12:20 am

2 stops24h 40m

$757

LondonSeattle

STN - SEA

STNSEA

London Stansted

Tue 8/18

6:30 am-9:40 am

3 stops35h 10m

Seattle/Tacoma Intl

Tue 9/1

11:25 pm-12:10 am

2 stops16h 45m

$765

LondonSeattle

STN - SEA

STNSEA

London Stansted

Sun 9/13

10:05 pm-9:04 pm

3 stops30h 59m

Seattle/Tacoma Intl

Mon 9/21

3:40 pm-7:15 pm

2 stops19h 35m

$768

LondonSeattle

STN - SEA

STNSEA

London Stansted

Sat 9/5

6:35 am-10:07 am

3 stops35h 32m

Seattle/Tacoma Intl

Fri 9/18

7:00 pm-12:50 am

2 stops21h 50m

$769

LondonSeattle

STN - SEA

STNSEA

London Stansted

Thu 9/10

6:30 am-6:45 pm

3 stops44h 15m

Seattle/Tacoma Intl

Sun 9/13

3:40 pm-7:55 pm

2 stops20h 15m

$773

LondonSeattle

STN - SEA

STNSEA

London Stansted

Sat 9/5

6:35 am-6:45 pm

3 stops44h 10m

Seattle/Tacoma Intl

Sun 10/4

3:40 pm-11:20 pm

2 stops23h 40m

$774

LondonSeattle

STN - SEA

STNSEA

London Stansted

Tue 8/18

6:30 am-9:40 am

3 stops35h 10m

Seattle/Tacoma Intl

Mon 8/31

7:00 pm-12:20 am

2 stops21h 20m

$775

LondonSeattle

STN - SEA

STNSEA

London Stansted

Sat 9/5

6:35 am-9:00 pm

3 stops46h 25m

Seattle/Tacoma Intl

Sun 10/4

3:40 pm-11:20 pm

2 stops23h 40m

$778

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

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

On average, the least expensive day to fly to Seattle from London Stansted Airport is on a Monday. momondo users have found tickets for Monday departures for as low as $849. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Friday is the most expensive day to depart from London Stansted Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $985.

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

Flying to Seattle from London Stansted Airport at noon is the least expensive time of day to depart. momondo users have found prices as low as $859 when looking at flights departing at noon. Flights to Seattle are more costly in the afternoon, with an average ticket price of $923. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

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 round-trip 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	15h 50m
Direct flights	None

The fastest flight from London Stansted Airport to Seattle takes 15h 50m

There are no direct flights from London Stansted Airport to Seattle. There are no popular flight routes from London Stansted Airport to Seattle.

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Frequently asked questions about flying from London Stansted Airport to Seattle

How far is London Stansted to Seattle/Tacoma Intl by plane?
The distance between London Stansted and Seattle/Tacoma Intl is about 4769.5 mi. A reasonable flight in good conditions will take 15h 50m.
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 a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to 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 required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Redmond

Kent

Lakewood

Tukwila

Puyallup

Marysville

Cle Elum

Federal Way

Fife

Centralia

Shoreline

Westport

Tumwater

Why use momondo?

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

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 Seattle from London.

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

Yes. momondo enables you to select and highlight flights to Seattle from London with this policy.

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

momondo provides multiple filters to help you find the best flight to Seattle from London. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are simply researching potential flights to Seattle, momondo offers a useful price alert feature which will track prices for flights to Seattle from London and alert you when they change.