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.

$511 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.

5:55 am - 5:00 pmSTN London Stansted-SEA Seattle/Tacoma Intl

19h 05m2 stops Kastrup Copenhagen Reykjavik Keflavik Intl

2:35 pm - 4:55 pmSEA Seattle/Tacoma Intl-STN London Stansted

18h 20m2 stops Reykjavik Keflavik Intl Kastrup Copenhagen

$687Multiple Airlines

Fri, Nov 6 - Sun, Nov 8

5:40 pm - 3:40 pmSTN London Stansted-SEA Seattle/Tacoma Intl

30h 00m2 stops Milan Malpensa Frankfurt am Main

6:05 pm - 8:55 pmSEA Seattle/Tacoma Intl-STN London Stansted

18h 50m2 stops Frankfurt am Main Milan Malpensa

$692Multiple Airlines

Mon, Oct 12 - Tue, Oct 20

10:15 am - 12:20 pmSTN London Stansted-SEA Seattle/Tacoma Intl

34h 05m2 stops Gothenburg Landvetter Frankfurt am Main

2:10 pm - 7:25 pmSEA Seattle/Tacoma Intl-STN London Stansted

21h 15m2 stops Frankfurt am Main Gothenburg Landvetter

$693Multiple Airlines

Wed, Oct 7 - Wed, Oct 14

11:00 am - 4:59 pmSTN London Stansted-SEA Seattle/Tacoma Intl

13h 59m1 stop Munich Franz Josef Strauss

6:50 pm - 3:35 pmSEA Seattle/Tacoma Intl-STN London Stansted

12h 45m1 stop Munich Franz Josef Strauss

$696Lufthansa

Wed, Sep 30 - Tue, Oct 6

8:25 pm - 11:55 amSTN London Stansted-SEA Seattle/Tacoma Intl

23h 30m2 stops Gothenburg Landvetter Frankfurt am Main

5:50 am - 7:25 pmSEA Seattle/Tacoma Intl-STN London Stansted

29h 35m3 stops Vancouver Intl Frankfurt am Main Gothenburg Landvetter

$704Multiple Airlines

Tue, Sep 29 - Wed, Oct 7

5:55 am - 8:40 pmSTN London Stansted-SEA Seattle/Tacoma Intl

22h 45m2 stops Kastrup Copenhagen Reykjavik Keflavik Intl

2:35 pm - 9:35 pmSEA Seattle/Tacoma Intl-STN London Stansted

23h 00m2 stops Reykjavik Keflavik Intl Kastrup Copenhagen

$720Multiple Airlines

Sat, Oct 24 - Sun, Nov 1

7:05 am - 1:45 pmSTN London Stansted-SEA Seattle/Tacoma Intl

14h 40m1 stop Kastrup Copenhagen

3:55 pm - 9:20 pmSEA Seattle/Tacoma Intl-STN London Stansted

21h 25m2 stops Kastrup Copenhagen Gothenburg Landvetter

$720Multiple Airlines

Sun, Oct 11 - Sun, Oct 11

10:05 pm - 1:45 pmSTN London Stansted-SEA Seattle/Tacoma Intl

23h 40m1 stop Kastrup Copenhagen

3:55 pm - 12:10 amSEA Seattle/Tacoma Intl-STN London Stansted

24h 15m1 stop Kastrup Copenhagen

$721Multiple Airlines

Thu, Oct 1 - Tue, Oct 6

7:10 am - 1:45 pmSTN London Stansted-SEA Seattle/Tacoma Intl

14h 35m1 stop Kastrup Copenhagen

3:55 pm - 11:45 amSEA Seattle/Tacoma Intl-STN London Stansted

35h 50m2 stops Kastrup Copenhagen Gothenburg Landvetter

$722Multiple Airlines

Tue, Oct 6 - Sun, Oct 11

10:05 pm - 1:45 pmSTN London Stansted-SEA Seattle/Tacoma Intl

23h 40m1 stop Kastrup Copenhagen

3:55 pm - 8:35 pmSEA Seattle/Tacoma Intl-STN London Stansted

20h 40m2 stops Kastrup Copenhagen Stockholm Arlanda

$723Multiple Airlines

Thu, Oct 1 - Tue, Oct 6

Cheap last minute flights

Enter your travel dates to find the best prices.

12:00 pm - 5:10 pmSTN London Stansted-SEA Seattle/Tacoma Intl

13h 10m1 stop Dublin

7:10 pm - 11:20 pmSEA Seattle/Tacoma Intl-STN London Stansted

20h 10m1 stop Dublin

$809Multiple Airlines

Thu, Sep 10 - Thu, Sep 24

12:00 pm - 5:10 pmSTN London Stansted-SEA Seattle/Tacoma Intl

13h 10m1 stop Dublin

7:10 pm - 11:20 pmSEA Seattle/Tacoma Intl-STN London Stansted

20h 10m1 stop Dublin

$811Multiple Airlines

Thu, Sep 10 - Thu, Sep 24

6:30 am - 9:40 amSTN London Stansted-SEA Seattle/Tacoma Intl

35h 10m3 stops Dublin Halifax Intl Calgary

3:40 pm - 11:20 pmSEA Seattle/Tacoma Intl-STN London Stansted

23h 40m2 stops Reykjavik Keflavik Intl Dublin

$847Multiple Airlines

Thu, Sep 10 - Wed, Sep 23

6:30 am - 9:40 amSTN London Stansted-SEA Seattle/Tacoma Intl

35h 10m3 stops Dublin Halifax Intl Calgary

7:10 pm - 11:20 pmSEA Seattle/Tacoma Intl-STN London Stansted

20h 10m1 stop Dublin

$859Multiple Airlines

Thu, Sep 10 - Wed, Sep 23

6:30 am - 9:04 pmSTN London Stansted-SEA Seattle/Tacoma Intl

22h 34m3 stops Dublin Halifax Intl Toronto Pearson Intl

3:40 pm - 7:55 pmSEA Seattle/Tacoma Intl-STN London Stansted

20h 15m2 stops Reykjavik Keflavik Intl Oslo Gardermoen

$883Multiple Airlines

Wed, Sep 9 - Sun, Sep 20

10:00 pm - 9:04 pmSTN London Stansted-SEA Seattle/Tacoma Intl

31h 04m3 stops Dublin Halifax Intl Toronto Pearson Intl

3:40 pm - 7:55 pmSEA Seattle/Tacoma Intl-STN London Stansted

20h 15m2 stops Reykjavik Keflavik Intl Oslo Gardermoen

$907Multiple Airlines

Tue, Sep 8 - Sun, Sep 13

6:30 am - 9:04 pmSTN London Stansted-SEA Seattle/Tacoma Intl

22h 34m3 stops Dublin Halifax Intl Toronto Pearson Intl

3:55 pm - 5:15 pmSEA Seattle/Tacoma Intl-STN London Stansted

17h 20m1 stop Kastrup Copenhagen

$917Multiple Airlines

Wed, Sep 9 - Sun, Sep 20

6:30 am - 9:40 amSTN London Stansted-SEA Seattle/Tacoma Intl

35h 10m3 stops Dublin Halifax Intl Calgary

5:50 am - 11:35 amSEA Seattle/Tacoma Intl-STN London Stansted

21h 45m3 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl Dublin

$944Multiple Airlines

Thu, Sep 10 - Wed, Sep 23

6:30 am - 6:45 pmSTN London Stansted-SEA Seattle/Tacoma Intl

20h 15m2 stops Dublin Calgary

3:40 pm - 7:55 pmSEA Seattle/Tacoma Intl-STN London Stansted

20h 15m2 stops Reykjavik Keflavik Intl Oslo Gardermoen

$945Multiple Airlines

Tue, Sep 8 - Sun, Sep 13

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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

Sep 30

STN11:00 amLondon Stansted

13h 59m

1 stop

SEA4:59 pmSeattle/Tacoma Intl

Oct 6

SEA6:50 pmSeattle/Tacoma Intl

12h 45m

1 stop

STN3:35 pmLondon Stansted

$696

Lufthansa

Sep 27

STN10:15 amLondon Stansted

14h 44m

1 stop

SEA4:59 pmSeattle/Tacoma Intl

Oct 3

SEA6:50 pmSeattle/Tacoma Intl

12h 45m

1 stop

STN3:35 pmLondon Stansted

$752

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 London Stansted - SEA Seattle/Tacoma Intl

STNSEA

London Stansted

Fri 11/6

5:55 am-5:00 pm

2 stops19h 05m

Seattle/Tacoma Intl

Sun 11/8

2:35 pm-4:55 pm

2 stops18h 20m

$687

LondonSeattle

STN London Stansted - SEA Seattle/Tacoma Intl

STNSEA

London Stansted

Mon 10/12

5:40 pm-3:40 pm

2 stops30h 00m

Seattle/Tacoma Intl

Tue 10/20

6:05 pm-8:55 pm

2 stops18h 50m

$692

LondonSeattle

STN London Stansted - SEA Seattle/Tacoma Intl

STNSEA

London Stansted

Wed 10/7

10:15 am-12:20 pm

2 stops34h 05m

Seattle/Tacoma Intl

Wed 10/14

2:10 pm-7:25 pm

2 stops21h 15m

$693

Quickest round-trip

LondonSeattle

STN London Stansted - SEA Seattle/Tacoma Intl

STNSEA

London Stansted

Wed 9/30

11:00 am-4:59 pm

1 stop13h 59m

Seattle/Tacoma Intl

Tue 10/6

6:50 pm-3:35 pm

1 stop12h 45m

$696

LondonSeattle

STN London Stansted - SEA Seattle/Tacoma Intl

STNSEA

London Stansted

Tue 9/29

8:25 pm-11:55 am

2 stops23h 30m

Seattle/Tacoma Intl

Wed 10/7

5:50 am-7:25 pm

3 stops29h 35m

$704

LondonSeattle

STN London Stansted - SEA Seattle/Tacoma Intl

STNSEA

London Stansted

Sat 10/24

5:55 am-8:40 pm

2 stops22h 45m

Seattle/Tacoma Intl

Sun 11/1

2:35 pm-9:35 pm

2 stops23h 00m

$720

LondonSeattle

STN London Stansted - SEA Seattle/Tacoma Intl

STNSEA

London Stansted

Sun 10/11

7:05 am-1:45 pm

1 stop14h 40m

Seattle/Tacoma Intl

Sun 10/11

3:55 pm-9:20 pm

2 stops21h 25m

$720

LondonSeattle

STN London Stansted - SEA Seattle/Tacoma Intl

STNSEA

London Stansted

Thu 10/1

10:05 pm-1:45 pm

1 stop23h 40m

Seattle/Tacoma Intl

Tue 10/6

3:55 pm-12:10 am

1 stop24h 15m

$721

LondonSeattle

STN London Stansted - SEA Seattle/Tacoma Intl

STNSEA

London Stansted

Tue 10/6

7:10 am-1:45 pm

1 stop14h 35m

Seattle/Tacoma Intl

Sun 10/11

3:55 pm-11:45 am

2 stops35h 50m

$722

LondonSeattle

STN London Stansted - SEA Seattle/Tacoma Intl

STNSEA

London Stansted

Thu 10/1

10:05 pm-1:45 pm

1 stop23h 40m

Seattle/Tacoma Intl

Tue 10/6

3:55 pm-8:35 pm

2 stops20h 40m

$723

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 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 $840. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Saturday 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 $943.

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 $807 when looking at flights departing at noon. Flights to Seattle are more costly in the afternoon, with an average ticket price of $911. 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

Best Price Found	$511
Fastest flight time	13h 40m
Direct flights	None

The best one-way flight to Seattle from London Stansted Airport in the past 72 hours is $511. The best round-trip flight deal from London Stansted Airport to Seattle found on momondo in the last 72 hours is $687.

The fastest flight from London Stansted Airport to Seattle takes 13h 40m

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 13h 40m.
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

Kent

Olympia

Redmond

Lakewood

Federal Way

Fife

Tukwila

Puyallup

Lynnwood

Cle Elum

Marysville

Kirkland

Centralia

Lacey

Shoreline

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.