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.

$535 Cheap Flights from London Stansted Airport to Seattle in 2026

1 adult

0 bags

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.

6:30 am - 5:10 pm

STN

SEA

18h 40m

1 stop

7:10 pm - 11:20 pm

SEA

STN

20h 10m

1 stop

$697Multiple Airlines

Wed, Jun 3 - Wed, Jun 10

6:35 am - 9:40 am

STN

SEA

35h 05m

3 stops

3:40 pm - 10:00 pm

SEA

STN

22h 20m

3 stops

$700Multiple Airlines

Sat, May 2 - Tue, May 5

8:30 am - 5:10 pm

STN

SEA

16h 40m

1 stop

7:10 pm - 5:05 pm

SEA

STN

13h 55m

1 stop

$701Multiple Airlines

Mon, Jun 1 - Mon, Jun 8

10:45 pm - 9:08 pm

STN

SEA

30h 23m

2 stops

3:40 pm - 12:20 am

SEA

STN

24h 40m

2 stops

$704Multiple Airlines

Mon, Jun 1 - Mon, Jun 8

6:30 am - 9:40 am

STN

SEA

35h 10m

3 stops

3:40 pm - 10:25 pm

SEA

STN

22h 45m

2 stops

$705Multiple Airlines

Thu, May 21 - Mon, Sep 7

6:30 am - 9:40 am

STN

SEA

35h 10m

3 stops

3:40 pm - 8:25 pm

SEA

STN

20h 45m

3 stops

$706Multiple Airlines

Thu, May 21 - Fri, Sep 18

6:30 am - 9:40 am

STN

SEA

35h 10m

3 stops

3:40 pm - 8:30 pm

SEA

STN

20h 50m

2 stops

$707Multiple Airlines

Thu, May 21 - Fri, Sep 25

6:30 am - 9:40 am

STN

SEA

35h 10m

3 stops

3:40 pm - 8:25 pm

SEA

STN

20h 45m

3 stops

$708Multiple Airlines

Thu, May 21 - Fri, Sep 25

6:30 am - 9:40 am

STN

SEA

35h 10m

3 stops

7:00 pm - 12:50 am

SEA

STN

21h 50m

2 stops

$709Multiple Airlines

Mon, May 4 - Fri, May 8

6:30 am - 9:40 am

STN

SEA

35h 10m

3 stops

3:40 pm - 8:35 pm

SEA

STN

20h 55m

2 stops

$710Multiple Airlines

Thu, May 21 - Tue, Sep 15

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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

Apr 27

STN10:50 amLondon Stansted

38h 25m

1 stop

SEA5:15 pmSeattle/Tacoma Intl

May 1

SEA7:10 pmSeattle/Tacoma Intl

37h 30m

1 stop

STN4:40 pmLondon Stansted

$975

Turkish Airlines

Apr 26

STN5:35 pmLondon Stansted

31h 40m

1 stop

SEA5:15 pmSeattle/Tacoma Intl

May 1

SEA7:10 pmSeattle/Tacoma Intl

19h 00m

1 stop

STN10:10 pmLondon Stansted

$988

Turkish Airlines

May 2

STN5:45 pmLondon Stansted

31h 30m

1 stop

SEA5:15 pmSeattle/Tacoma Intl

May 6

SEA7:10 pmSeattle/Tacoma Intl

19h 00m

1 stop

STN10:10 pmLondon Stansted

$995

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 6/3

6:30 am-5:10 pm

1 stop18h 40m

Seattle/Tacoma Intl

Wed 6/10

7:10 pm-11:20 pm

1 stop20h 10m

$697

LondonSeattle

STN - SEA

STNSEA

London Stansted

Sat 5/2

6:35 am-9:40 am

3 stops35h 05m

Seattle/Tacoma Intl

Tue 5/5

3:40 pm-10:00 pm

3 stops22h 20m

$700

Quickest round-trip

LondonSeattle

STN - SEA

STNSEA

London Stansted

Mon 6/1

8:30 am-5:10 pm

1 stop16h 40m

Seattle/Tacoma Intl

Mon 6/8

7:10 pm-5:05 pm

1 stop13h 55m

$701

LondonSeattle

STN - SEA

STNSEA

London Stansted

Mon 6/1

10:45 pm-9:08 pm

2 stops30h 23m

Seattle/Tacoma Intl

Mon 6/8

3:40 pm-12:20 am

2 stops24h 40m

$704

LondonSeattle

STN - SEA

STNSEA

London Stansted

Thu 5/21

6:30 am-9:40 am

3 stops35h 10m

Seattle/Tacoma Intl

Mon 9/7

3:40 pm-10:25 pm

2 stops22h 45m

$705

LondonSeattle

STN - SEA

STNSEA

London Stansted

Thu 5/21

6:30 am-9:40 am

3 stops35h 10m

Seattle/Tacoma Intl

Fri 9/18

3:40 pm-8:25 pm

3 stops20h 45m

$706

LondonSeattle

STN - SEA

STNSEA

London Stansted

Thu 5/21

6:30 am-9:40 am

3 stops35h 10m

Seattle/Tacoma Intl

Fri 9/25

3:40 pm-8:30 pm

2 stops20h 50m

$707

LondonSeattle

STN - SEA

STNSEA

London Stansted

Thu 5/21

6:30 am-9:40 am

3 stops35h 10m

Seattle/Tacoma Intl

Fri 9/25

3:40 pm-8:25 pm

3 stops20h 45m

$708

LondonSeattle

STN - SEA

STNSEA

London Stansted

Mon 5/4

6:30 am-9:40 am

3 stops35h 10m

Seattle/Tacoma Intl

Fri 5/8

7:00 pm-12:50 am

2 stops21h 50m

$709

LondonSeattle

STN - SEA

STNSEA

London Stansted

Thu 5/21

6:30 am-9:40 am

3 stops35h 10m

Seattle/Tacoma Intl

Tue 9/15

3:40 pm-8:35 pm

2 stops20h 55m

$710

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 $800. 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 $947.

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 $857 when looking at flights departing at noon. Flights to Seattle are more costly in the morning, with an average ticket price of $892. Departure times in the morning 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	17h 18m
Direct flights	None

The fastest flight from London Stansted Airport to Seattle takes 17h 18m

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?
The distance between London Stansted and Seattle/Tacoma Intl is about 4769.5 mi. A reasonable flight in good conditions will take 17h 18m.
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

Marysville

Tukwila

Puyallup

Lakewood

Cle Elum

Federal Way

Centralia

Fife

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.