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.

$378 Cheap Flights from London Stansted Airport to Seattle in 2025

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Find the cheapest flights from London Stansted Airport to Seattle

Round-trip

One-way

Last minute

Cheap round-trip flights

8:15 am - 11:55 amSTN-SEA

35h 40m2 stops

2:20 pm - 8:30 pmSEA-STN

22h 10m2 stops

$584

Find Deal

Tue, Sep 16 - Tue, Sep 23

8:15 am - 5:50 pmSTN-SEA

17h 35m1 stop

7:35 pm - 9:00 pmSEA-STN

17h 25m1 stop

$609

Find Deal

Mon, Sep 15 - Mon, Sep 22

8:15 am - 5:50 pmSTN-SEA

17h 35m1 stop

7:35 pm - 9:00 pmSEA-STN

17h 25m1 stop

$610

Find Deal

Mon, Sep 15 - Mon, Sep 22

8:15 am - 5:50 pmSTN-SEA

17h 35m1 stop

7:35 pm - 9:00 pmSEA-STN

17h 25m1 stop

$643

Find Deal

Mon, Sep 15 - Mon, Sep 22

8:15 am - 5:50 pmSTN-SEA

17h 35m1 stop

7:35 pm - 9:00 pmSEA-STN

17h 25m1 stop

$645

Find Deal

Mon, Sep 15 - Mon, Sep 22

7:15 pm - 6:00 pmSTN-SEA

29h 45m2 stops

2:35 pm - 10:50 pmSEA-STN

24h 15m2 stops

$673

Find Deal

Sat, Nov 1 - Sat, Nov 8

8:15 am - 9:22 amSTN-SEA

33h 07m3 stops

10:00 am - 9:15 pmSEA-STN

27h 15m3 stops

$703

Find Deal

Tue, Sep 16 - Tue, Sep 23

10:50 pm - 10:16 pmSTN-SEA

31h 26m3 stops

10:00 am - 9:15 pmSEA-STN

27h 15m3 stops

$742

Find Deal

Fri, Sep 12 - Sun, Sep 28

8:15 am - 9:22 amSTN-SEA

33h 07m3 stops

10:00 am - 2:25 pmSEA-STN

20h 25m3 stops

$745

Find Deal

Wed, Sep 10 - Wed, Sep 17

7:30 pm - 3:05 pmSTN-SEA

27h 35m2 stops

5:15 pm - 9:10 pmSEA-STN

19h 55m2 stops

$779

Find Deal

Thu, Oct 2 - Sat, Oct 11

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

Tue 9/16

8:15 am-11:55 am

2 stops35h 40m

Seattle/Tacoma Intl

Tue 9/23

2:20 pm-8:30 pm

2 stops22h 10m

$584

LondonSeattle

STN - SEA

STNSEA

London Stansted

Mon 9/15

8:15 am-5:50 pm

1 stop17h 35m

Seattle/Tacoma Intl

Mon 9/22

7:35 pm-9:00 pm

1 stop17h 25m

$609

LondonSeattle

STN - SEA

STNSEA

London Stansted

Mon 9/15

8:15 am-5:50 pm

1 stop17h 35m

Seattle/Tacoma Intl

Mon 9/22

7:35 pm-9:00 pm

1 stop17h 25m

$610

LondonSeattle

STN - SEA

STNSEA

London Stansted

Mon 9/15

8:15 am-5:50 pm

1 stop17h 35m

Seattle/Tacoma Intl

Mon 9/22

7:35 pm-9:00 pm

1 stop17h 25m

$643

LondonSeattle

STN - SEA

STNSEA

London Stansted

Mon 9/15

8:15 am-5:50 pm

1 stop17h 35m

Seattle/Tacoma Intl

Mon 9/22

7:35 pm-9:00 pm

1 stop17h 25m

$645

LondonSeattle

STN - SEA

STNSEA

London Stansted

Sat 11/1

7:15 pm-6:00 pm

2 stops29h 45m

Seattle/Tacoma Intl

Sat 11/8

2:35 pm-10:50 pm

2 stops24h 15m

$673

LondonSeattle

STN - SEA

STNSEA

London Stansted

Tue 9/16

8:15 am-9:22 am

3 stops33h 07m

Seattle/Tacoma Intl

Tue 9/23

10:00 am-9:15 pm

3 stops27h 15m

$703

LondonSeattle

STN - SEA

STNSEA

London Stansted

Fri 9/12

10:50 pm-10:16 pm

3 stops31h 26m

Seattle/Tacoma Intl

Sun 9/28

10:00 am-9:15 pm

3 stops27h 15m

$742

LondonSeattle

STN - SEA

STNSEA

London Stansted

Wed 9/10

8:15 am-9:22 am

3 stops33h 07m

Seattle/Tacoma Intl

Wed 9/17

10:00 am-2:25 pm

3 stops20h 25m

$745

LondonSeattle

STN - SEA

STNSEA

London Stansted

Thu 10/2

7:30 pm-3:05 pm

2 stops27h 35m

Seattle/Tacoma Intl

Sat 10/11

5:15 pm-9:10 pm

2 stops19h 55m

$779

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 $791. 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 $1,145.

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 $845 when looking at flights departing at noon. Flights to Seattle are more costly in the morning, with an average ticket price of $894. 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

Best Price Found	$378
Fastest flight time	12h 20m
Direct flights	None
Airports in Seattle	1 airport

The best one-way flight to Seattle from London Stansted Airport in the past 72 hours is $378. The best round-trip flight deal from London Stansted Airport to Seattle found on momondo in the last 72 hours is $584.

The fastest flight from London Stansted Airport to Seattle takes 12h 20m

There are no direct flights from London Stansted Airport to Seattle. Popular non-direct route for this connection is London Stansted Airport - Seattle/Tacoma Intl Airport.

There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

Search flight deals

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 12h 20m.
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.

Leavenworth

Tacoma

SeaTac

Ocean Shores

Olympia

Renton

Kent

Federal Way

Lynnwood

Puyallup

Marysville

Tukwila

Kirkland

Lakewood

Fife

Cle Elum

Shoreline

Centralia

Westport

Redmond

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.