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Cheap flights from London Stansted Airport to Seattle from £348

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 23/5. Fares are subject to change and may not be available on all flights or dates of travel.
STN — SEA
27 Feb — 6 Mar1
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 January 2026.

Wed 4/308:30
STN
-
SEA
2 stops16h 30m
Multiple Airlines
Mon 9/315:35
SEA
-
STN
2 stops19h 45m
Multiple Airlines
Deal found 27/1£433
Tue 28/422:00
STN
-
SEA
3 stops30h 28m
Multiple Airlines
Tue 5/515:40
SEA
-
STN
2 stops16h 20m
Multiple Airlines
Deal found 26/1£487
Tue 28/407:05
STN
-
SEA
2 stops16h 55m
Multiple Airlines
Mon 4/518:55
SEA
-
STN
1 stop18h 25m
Multiple Airlines
Deal found 26/1£494
Mon 27/412:05
STN
-
SEA
2 stops35h 55m
Multiple Airlines
Mon 4/518:55
SEA
-
STN
1 stop11h 45m
Multiple Airlines
Deal found 26/1£497
Wed 29/406:30
STN
-
SEA
2 stops20h 53m
Multiple Airlines
Tue 12/518:55
SEA
-
STN
1 stop14h 40m
Multiple Airlines
Deal found 25/1£502
Wed 29/406:30
STN
-
SEA
2 stops20h 53m
Multiple Airlines
Tue 5/518:55
SEA
-
STN
1 stop18h 25m
Multiple Airlines
Deal found 26/1£503
Fri 11/906:40
STN
-
SEA
2 stops17h 20m
Multiple Airlines
Mon 28/918:55
SEA
-
STN
1 stop14h 10m
Multiple Airlines
Deal found 26/1£512

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 January 2026.

Round-trip from

£432

One-way from

£348

Popular in

July

Cheapest in

February

Average price

£469
20/4-23/4
  • 20/4-23/4
  • 4 total stops
  • 46h 26m total
  • London to Seattle
Search Deals
23/5
  • 23/5
  • 3 total stops
  • 43h 40m total
  • London to Seattle
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£57 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 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 January 2026.
Use the filters below to find and compare flights from London Stansted Airport to Seattle that are best for you.

Fly from

Stansted

Fly to

Seattle

Route

Depart

Return

Price

LondonSeattle

STN - SEA

STNSEA

London Stansted

Tue 10/2

05:55-17:00

2 stops19h 05m

Seattle/Tacoma Intl

Wed 25/2

14:35-22:15

2 stops23h 40m

£451

LondonSeattle

STN - SEA

STNSEA

London Stansted

Wed 29/4

06:30-19:23

2 stops20h 53m

Seattle/Tacoma Intl

Tue 5/5

18:55-21:20

1 stop18h 25m

£503

LondonSeattle

STN - SEA

STNSEA

London Stansted

Wed 25/2

06:30-18:20

1 stop19h 50m

Seattle/Tacoma Intl

Wed 4/3

20:05-17:50

1 stop13h 45m

£569

LondonSeattle

STN - SEA

STNSEA

London Stansted

Wed 4/3

06:30-20:16

2 stops21h 46m

Seattle/Tacoma Intl

Mon 9/3

21:05-18:20

1 stop14h 15m

£570

LondonSeattle

STN - SEA

STNSEA

London Stansted

Sun 17/5

05:55-16:00

2 stops18h 05m

Seattle/Tacoma Intl

Mon 1/6

18:55-19:25

1 stop16h 30m

£617

LondonSeattle

STN - SEA

STNSEA

London Stansted

Fri 13/3

18:55-16:40

2 stops28h 45m

Seattle/Tacoma Intl

Fri 20/3

16:10-22:35

2 stops23h 25m

£649

LondonSeattle

STN - SEA

STNSEA

London Stansted

Wed 29/4

10:50-17:15

1 stop38h 25m

Seattle/Tacoma Intl

Tue 12/5

19:10-16:50

1 stop37h 40m

£681

LondonSeattle

STN - SEA

STNSEA

London Stansted

Mon 27/4

10:50-17:15

1 stop38h 25m

Seattle/Tacoma Intl

Sun 3/5

19:10-16:50

1 stop37h 40m

£690

LondonSeattle

STN - SEA

STNSEA

London Stansted

Mon 4/5

10:50-17:15

1 stop38h 25m

Seattle/Tacoma Intl

Fri 8/5

19:10-22:10

1 stop19h 00m

£699

LondonSeattle

STN - SEA

STNSEA

London Stansted

Sat 25/4

10:50-17:15

1 stop38h 25m

Seattle/Tacoma Intl

Sat 2/5

19:10-09:55

1 stop30h 45m

£708

Flights are sorted by cheapest return flights first.

Deals found on 26/1

Showing 1-10 of 23 results
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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.

  • 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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