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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 9/12. Fares are subject to change and may not be available on all flights or dates of travel.
STN — SEA
14 Dec — 21 Dec1
1 adult
1 adult, Economy, 0 bags

Find 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 14 November 2025.

Mon 8/1208:30STN - SEA
1 stop17h 50mMultiple Airlines
Sun 14/1220:05SEA - STN
1 stop12h 30mMultiple Airlines
Deal found 12/11£490
Sat 13/1210:45STN - SEA
3 stops43h 31mMultiple Airlines
Mon 5/114:35SEA - STN
2 stops20h 50mMultiple Airlines
Deal found 12/11£626
Tue 23/1220:50STN - SEA
2 stops26h 50mMultiple Airlines
Mon 29/1217:40SEA - STN
2 stops21h 00mMultiple Airlines
Deal found 12/11£698
Thu 4/1220:05STN - SEA
2 stops34h 11mMultiple Airlines
Tue 6/114:35SEA - STN
2 stops19h 45mMultiple Airlines
Deal found 12/11£726
Sun 16/1118:15STN - SEA
2 stops29h 25mMultiple Airlines
Fri 5/1210:05SEA - STN
3 stops27h 40mMultiple Airlines
Deal found 12/11£728
Tue 18/1106:30STN - SEA
2 stops18h 30mMultiple Airlines
Wed 31/1214:35SEA - STN
2 stops22h 55mMultiple Airlines
Deal found 12/11£761
Wed 19/1106:30STN - SEA
2 stops18h 30mMultiple Airlines
Wed 31/1214:35SEA - STN
2 stops22h 55mMultiple Airlines
Deal found 13/11£764
Sat 6/1205:50STN - SEA
2 stops24h 26mMultiple Airlines
Tue 6/114:35SEA - STN
2 stops19h 45mMultiple Airlines
Deal found 12/11£777
Sat 6/1221:10STN - SEA
2 stops27h 50mMultiple Airlines
Sun 14/1205:50SEA - STN
3 stops20h 00mMultiple Airlines
Deal found 12/11£793

Cheap 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 14 November 2025.

Round-trip from

£490

One-way from

£421

Popular in

July

Cheapest in

January

Average price

£544
8/12-14/12
  • 8/12-14/12
  • 2 total stops
  • 30h 20m total
  • London to Seattle
Search Deals
9/12
  • 9/12
  • 3 total stops
  • 31h 15m total
  • London to Seattle
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£58 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
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 14 November 2025.
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

Sat 13/12

10:45-22:16

3 stops43h 31m

Seattle/Tacoma Intl

Mon 5/1

14:35-19:25

2 stops20h 50m

£626

LondonSeattle

STN - SEA

STNSEA

London Stansted

Thu 19/3

18:10-19:20

2 stops32h 10m

Seattle/Tacoma Intl

Mon 6/4

18:45-23:20

1 stop20h 35m

£657

LondonSeattle

STN - SEA

STNSEA

London Stansted

Thu 19/3

08:30-00:08

2 stops22h 38m

Seattle/Tacoma Intl

Sun 5/4

18:45-07:50

1 stop29h 05m

£697

LondonSeattle

STN - SEA

STNSEA

London Stansted

Tue 5/5

06:15-17:15

1 stop19h 00m

Seattle/Tacoma Intl

Sat 9/5

19:10-10:15

1 stop31h 05m

£728

LondonSeattle

STN - SEA

STNSEA

London Stansted

Tue 16/12

06:30-17:00

2 stops18h 30m

Seattle/Tacoma Intl

Mon 5/1

14:35-19:25

2 stops20h 50m

£761

LondonSeattle

STN - SEA

STNSEA

London Stansted

Sun 26/4

05:55-17:50

2 stops19h 55m

Seattle/Tacoma Intl

Sun 17/5

07:05-14:15

3 stops23h 10m

£763

LondonSeattle

STN - SEA

STNSEA

London Stansted

Sat 6/12

21:10-17:00

2 stops27h 50m

Seattle/Tacoma Intl

Sun 14/12

08:10-09:50

2 stops17h 40m

£793

LondonSeattle

STN - SEA

STNSEA

London Stansted

Mon 8/12

07:10-22:16

3 stops47h 06m

Seattle/Tacoma Intl

Sun 14/12

08:10-09:50

2 stops17h 40m

£802

LondonSeattle

STN - SEA

STNSEA

London Stansted

Sun 7/12

06:15-14:20

3 stops40h 05m

Seattle/Tacoma Intl

Sun 14/12

08:10-09:50

2 stops17h 40m

£819

LondonSeattle

STN - SEA

STNSEA

London Stansted

Tue 9/12

21:20-20:35

3 stops31h 15m

£421

Flights are sorted by cheapest return flights first.

Deals found on 11/11

Showing 1-10 of 20 results
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 £728, Turkish Airlines can have you in Seattle from London Stansted Airport in 19h. 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
Leavenworth
Bothell
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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