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.

$550 Cheap Flights from London Stansted Airport to Seattle in 2025/26

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Find the cheapest flights from London Stansted Airport to Seattle

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Cheap round-trip flights

Enter your travel dates to find the best prices.

6:30 am - 5:00 pmSTN-SEA

18h 30m2 stops

2:35 pm - 9:20 pmSEA-STN

22h 45m2 stops

$597Multiple Airlines

Find Deal

Fri, Nov 21 - Fri, Nov 28

5:55 am - 5:00 pmSTN-SEA

19h 05m2 stops

2:35 pm - 10:15 pmSEA-STN

23h 40m2 stops

$605Multiple Airlines

Find Deal

Thu, Nov 6 - Wed, Nov 19

5:55 am - 5:00 pmSTN-SEA

19h 05m2 stops

2:35 pm - 11:10 pmSEA-STN

24h 35m2 stops

$609Multiple Airlines

Find Deal

Thu, Nov 6 - Thu, Nov 13

10:40 am - 1:20 pmSTN-SEA

34h 40m2 stops

2:00 pm - 8:00 pmSEA-STN

22h 00m2 stops

$644Multiple Airlines

Find Deal

Sat, Nov 8 - Sat, Nov 15

9:20 am - 5:50 pmSTN-SEA

16h 30m1 stop

8:05 pm - 6:20 pmSEA-STN

14h 15m1 stop

$695Multiple Airlines

Find Deal

Thu, Oct 23 - Mon, Nov 3

6:30 am - 6:20 pmSTN-SEA

19h 50m1 stop

8:05 pm - 4:35 pmSEA-STN

12h 30m1 stop

$722Multiple Airlines

Find Deal

Fri, Nov 21 - Sun, Nov 30

6:30 am - 6:20 pmSTN-SEA

19h 50m1 stop

8:05 pm - 6:20 pmSEA-STN

14h 15m1 stop

$724Multiple Airlines

Find Deal

Fri, Nov 28 - Mon, Dec 1

6:30 am - 5:00 pmSTN-SEA

18h 30m2 stops

2:35 pm - 1:20 pmSEA-STN

14h 45m2 stops

$745Multiple Airlines

Find Deal

Sat, Nov 22 - Sat, Nov 29

6:30 am - 5:00 pmSTN-SEA

18h 30m2 stops

2:35 pm - 1:20 pmSEA-STN

14h 45m2 stops

$749Multiple Airlines

Find Deal

Sat, Nov 22 - Sat, Nov 29

11:15 am - 5:50 pmSTN-SEA

14h 35m1 stop

8:05 pm - 4:35 pmSEA-STN

12h 30m1 stop

$754Multiple Airlines

Find Deal

Fri, Oct 24 - Sun, Nov 2

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

LondonSeattle

STN - SEA

STNSEA

London Stansted

Fri 11/21

6:30 am-5:00 pm

2 stops18h 30m

Seattle/Tacoma Intl

Fri 11/28

2:35 pm-9:20 pm

2 stops22h 45m

$597

LondonSeattle

STN - SEA

STNSEA

London Stansted

Thu 11/6

5:55 am-5:00 pm

2 stops19h 05m

Seattle/Tacoma Intl

Wed 11/19

2:35 pm-10:15 pm

2 stops23h 40m

$605

LondonSeattle

STN - SEA

STNSEA

London Stansted

Thu 11/6

5:55 am-5:00 pm

2 stops19h 05m

Seattle/Tacoma Intl

Thu 11/13

2:35 pm-11:10 pm

2 stops24h 35m

$609

LondonSeattle

STN - SEA

STNSEA

London Stansted

Sat 11/8

10:40 am-1:20 pm

2 stops34h 40m

Seattle/Tacoma Intl

Sat 11/15

2:00 pm-8:00 pm

2 stops22h 00m

$644

LondonSeattle

STN - SEA

STNSEA

London Stansted

Thu 10/23

9:20 am-5:50 pm

1 stop16h 30m

Seattle/Tacoma Intl

Mon 11/3

8:05 pm-6:20 pm

1 stop14h 15m

$695

LondonSeattle

STN - SEA

STNSEA

London Stansted

Fri 11/21

6:30 am-6:20 pm

1 stop19h 50m

Seattle/Tacoma Intl

Sun 11/30

8:05 pm-4:35 pm

1 stop12h 30m

$722

LondonSeattle

STN - SEA

STNSEA

London Stansted

Fri 11/28

6:30 am-6:20 pm

1 stop19h 50m

Seattle/Tacoma Intl

Mon 12/1

8:05 pm-6:20 pm

1 stop14h 15m

$724

LondonSeattle

STN - SEA

STNSEA

London Stansted

Sat 11/22

6:30 am-5:00 pm

2 stops18h 30m

Seattle/Tacoma Intl

Sat 11/29

2:35 pm-1:20 pm

2 stops14h 45m

$745

LondonSeattle

STN - SEA

STNSEA

London Stansted

Sat 11/22

6:30 am-5:00 pm

2 stops18h 30m

Seattle/Tacoma Intl

Sat 11/29

2:35 pm-1:20 pm

2 stops14h 45m

$749

LondonSeattle

STN - SEA

STNSEA

London Stansted

Fri 10/24

11:15 am-5:50 pm

1 stop14h 35m

Seattle/Tacoma Intl

Sun 11/2

8:05 pm-4:35 pm

1 stop12h 30m

$754

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

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 Wednesday. momondo users have found tickets for Wednesday departures for as low as $785. 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 $1,028.

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 $842 when looking at flights departing at noon. Flights to Seattle are more costly in the morning, with an average ticket price of $859. 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

Direct flights	None

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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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 14h 35m.
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

Kent

Marysville

Puyallup

Federal Way

Tukwila

Kirkland

Fife

Centralia

Lakewood

Shoreline

Cle Elum

Redmond

Westport

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.