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Cheap flights from London Stansted Airport to Seattle from £311

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 14/6. Fares are subject to change and may not be available on all flights or dates of travel.
STN — SEA
30 Mar — 6 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Stansted to Seattle

Enter your travel dates to find the best prices.

Cheapest flights from Stansted to Seattle
Explore the most affordable flight options available from Stansted to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 February 2026.

Tue 14/406:30
STN
-
SEA
2 stops22h 10m
Multiple Airlines
Tue 21/415:40
SEA
-
STN
2 stops23h 40m
Multiple Airlines
Deal found 28/2£407
Mon 13/408:30
STN
-
SEA
3 stops33h 05m
Multiple Airlines
Mon 27/415:40
SEA
-
STN
2 stops19h 35m
Multiple Airlines
Deal found 25/2£410
Sun 3/509:15
STN
-
SEA
2 stops32h 25m
Multiple Airlines
Sat 9/519:00
SEA
-
STN
2 stops21h 05m
Multiple Airlines
Deal found 26/2£435
Wed 22/422:45
STN
-
SEA
3 stops47h 34m
Multiple Airlines
Wed 6/515:40
SEA
-
STN
2 stops16h 50m
Multiple Airlines
Deal found 26/2£437
Mon 13/406:30
STN
-
SEA
2 stops22h 10m
Multiple Airlines
Mon 20/415:40
SEA
-
STN
2 stops23h 40m
Multiple Airlines
Deal found 26/2£447

Find flight deals from Stansted to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Stansted (STN) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 28 February 2026.

Round-trip from

£407

One-way from

£311

Popular in

July

Cheapest in

February

Average price

£482
14/4-21/4
  • 14/4-21/4
  • 4 total stops
  • 45h 50m total
  • London to Seattle
Search Deals
14/6
  • 14/6
  • 2 total stops
  • 42h 05m total
  • London to Seattle
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£56 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£8 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Stansted to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 28 February 2026.
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 10/4

17:25-16:00

2 stops30h 35m

Seattle/Tacoma Intl

Fri 17/4

19:00-20:30

2 stops17h 30m

£535

LondonSeattle

STN - SEA

STNSEA

London Stansted

Wed 22/4

06:55-17:15

1 stop18h 20m

Seattle/Tacoma Intl

Wed 29/4

19:10-09:55

1 stop30h 45m

£697

LondonSeattle

STN - SEA

STNSEA

London Stansted

Sat 25/4

17:45-17:15

1 stop31h 30m

Seattle/Tacoma Intl

Sat 2/5

19:10-09:55

1 stop30h 45m

£717

LondonSeattle

STN - SEA

STNSEA

London Stansted

Sun 12/7

06:45-21:00

2 stops22h 15m

Seattle/Tacoma Intl

Mon 13/7

09:55-23:50

3 stops29h 55m

£746

LondonSeattle

STN - SEA

STNSEA

London Stansted

Wed 17/6

06:55-17:15

1 stop18h 20m

Seattle/Tacoma Intl

Tue 8/9

19:10-16:40

1 stop37h 30m

£807

LondonSeattle

STN - SEA

STNSEA

London Stansted

Thu 18/6

17:35-17:15

1 stop31h 40m

Seattle/Tacoma Intl

Tue 8/9

19:10-16:40

1 stop37h 30m

£807

LondonSeattle

STN - SEA

STNSEA

London Stansted

Sat 20/6

10:50-17:15

1 stop38h 25m

Seattle/Tacoma Intl

Wed 9/9

19:10-16:40

1 stop37h 30m

£819

LondonSeattle

STN - SEA

STNSEA

London Stansted

Sat 21/3

10:50-18:05

1 stop38h 15m

Seattle/Tacoma Intl

Mon 20/4

19:10-09:55

1 stop30h 45m

£862

LondonSeattle

STN - SEA

STNSEA

London Stansted

Tue 14/4

06:55-17:15

1 stop18h 20m

Seattle/Tacoma Intl

Tue 21/4

08:42-16:50

2 stops24h 08m

£864

LondonSeattle

STN - SEA

STNSEA

London Stansted

Wed 24/6

17:45-10:40

1 stop24h 55m

Seattle/Tacoma Intl

Wed 15/7

13:30-22:10

2 stops24h 40m

£953

Flights are sorted by cheapest return flights first.

Deals found on 28/2

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

Best time to book a flight from Stansted to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Stansted with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

Find useful and relevant information for your journey from Stansted to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Seattle from London Stansted?

    Most people fly into Seattle/Tacoma Intl (SEA) if they book a flight to Seattle from London Stansted. On average, Seattle/Tacoma Intl has 0 inbound flights from London Stansted per day from 0 airlines. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

  • How long is the flight from London Stansted Airport to Seattle?

    For as low as £697, Turkish Airlines can have you in Seattle from London Stansted Airport in 18h 20m. The distance from London Stansted Airport to Seattle is about 4778 mi.

  • Can I find deals for flights from Stansted to Seattle that include hotel bookings?

    Yes. In addition to deals on Stansted to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Stansted to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Stansted to Seattle.

  • Can I find deals for business class flights from Stansted to Seattle?

    Yes. Cheapflights offers flight deals from Stansted to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Federal Way
SeaTac

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How does Cheapflights help users find flights from Stansted to Seattle?

Cheapflights helps you search for flights from Stansted to Seattle via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Stansted to Seattle?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Seattle from Stansted.

Can Cheapflights find flights from Stansted to Seattle with no change fees?

Certainly. Search results for flights to Seattle from Stansted shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Stansted to Seattle become cheaper?

Yes, Cheapflights offers price alerts on Stansted to Seattle flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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