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Cheap flights from London Stansted Airport to Seattle from £421

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 23/8. Fares are subject to change and may not be available on all flights or dates of travel.
STN — SEA
9 Aug — 16 Aug1
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 10 July 2026.

Fri 4/906:50
STN
-
SEA
2 stops21h 50m
Multiple Airlines
Fri 18/915:40
SEA
-
STN
2 stops25h 10m
Multiple Airlines
Deal found 7/7£492
Wed 26/821:20
STN
-
SEA
2 stops26h 40m
Multiple Airlines
Wed 9/917:40
SEA
-
STN
2 stops22h 30m
Multiple Airlines
Deal found 5/7£508
Mon 12/1017:40
STN
-
SEA
2 stops30h 00m
Multiple Airlines
Tue 20/1018:05
SEA
-
STN
2 stops18h 50m
Multiple Airlines
Deal found 7/7£514
Sat 5/911:10
STN
-
SEA
3 stops34h 35m
Multiple Airlines
Sat 19/915:55
SEA
-
STN
3 stops23h 25m
Multiple Airlines
Deal found 5/7£530
Mon 5/1008:30
STN
-
SEA
2 stops17h 25m
Multiple Airlines
Fri 16/1015:40
SEA
-
STN
2 stops17h 55m
Multiple Airlines
Deal found 9/7£559
Thu 27/807:20
STN
-
SEA
2 stops16h 40m
Multiple Airlines
Wed 9/917:40
SEA
-
STN
2 stops18h 55m
Multiple Airlines
Deal found 8/7£564
Thu 20/807:00
STN
-
SEA
2 stops21h 40m
Multiple Airlines
Thu 27/819:00
SEA
-
STN
2 stops19h 55m
Multiple Airlines
Deal found 6/7£567
Fri 4/915:10
STN
-
SEA
2 stops28h 35m
Multiple Airlines
Tue 15/919:00
SEA
-
STN
2 stops21h 10m
Multiple Airlines
Deal found 8/7£574
Thu 27/821:55
STN
-
SEA
2 stops26h 05m
Multiple Airlines
Thu 10/918:05
SEA
-
STN
2 stops18h 55m
Multiple Airlines
Deal found 6/7£578

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 10 July 2026.

Round-trip from

£492

One-way from

£421

Popular in

July

Cheapest in

February

Average price

£631
4/9-18/9
  • 4/9-18/9
  • 4 total stops
  • 47h 00m total
  • London to Seattle
Search Deals
23/8
  • 23/8
  • 2 total stops
  • 20h 10m total
  • London to Seattle
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£44 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£6 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 10 July 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

Cheapest return flight

LondonSeattle

STN - SEA

STNSEA

London Stansted

Mon 5/10

10:50-17:20

1 stop38h 30m

Seattle/Tacoma Intl

Fri 16/10

10:42-22:10

2 stops27h 28m

£760

LondonSeattle

STN - SEA

STNSEA

London Stansted

Sun 4/10

06:55-22:56

2 stops24h 01m

Seattle/Tacoma Intl

Fri 9/10

10:42-22:10

2 stops27h 28m

£761
Fastest return journey

LondonSeattle

STN - SEA

STNSEA

London Stansted

Wed 14/10

06:55-17:20

1 stop18h 25m

Seattle/Tacoma Intl

Sat 17/10

19:15-09:55

1 stop30h 40m

£768

LondonSeattle

STN - SEA

STNSEA

London Stansted

Sat 26/9

17:45-17:20

1 stop31h 35m

Seattle/Tacoma Intl

Thu 22/10

19:15-16:50

1 stop37h 35m

£834

LondonSeattle

STN - SEA

STNSEA

London Stansted

Tue 11/8

06:30-09:40

2 stops35h 10m

Seattle/Tacoma Intl

Tue 1/9

05:50-11:05

3 stops21h 15m

£867
Cheapest one-way

LondonSeattle

STN - SEA

STNSEA

London Stansted

Sat 8/8

06:35-11:04

3 stops36h 29m

£504

LondonSeattle

STN - SEA

STNSEA

London Stansted

Sat 3/10

21:40-13:45

1 stop24h 05m

£526
Fastest single journey

LondonSeattle

STN - SEA

STNSEA

London Stansted

Wed 23/9

06:55-22:45

2 stops23h 50m

£716

LondonSeattle

STN - SEA

STNSEA

London Stansted

Sun 13/9

06:55-22:45

2 stops23h 50m

£726

LondonSeattle

STN - SEA

STNSEA

London Stansted

Thu 17/9

17:35-17:20

1 stop31h 45m

£747

Flights are sorted by cheapest return flights first.

Deals found on 9/7

Showing 1-10 of 14 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 £760, Turkish Airlines can have you in Seattle from London Stansted Airport in 38h 30m. 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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