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Cheap flights from London Stansted Airport to Seattle from £399

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 25/6. Fares are subject to change and may not be available on all flights or dates of travel.
STN — SEA
28 May — 4 Jun1
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 April 2026.

Fri 22/506:35
STN
-
SEA
2 stops35h 05m
Multiple Airlines
Mon 25/519:00
SEA
-
STN
2 stops21h 20m
Multiple Airlines
Deal found 24/4£522
Wed 3/606:30
STN
-
SEA
1 stop18h 40m
Multiple Airlines
Sun 7/619:10
SEA
-
STN
1 stop18h 10m
Multiple Airlines
Deal found 23/4£527
Mon 18/506:30
STN
-
SEA
3 stops35h 10m
Multiple Airlines
Thu 13/815:40
SEA
-
STN
2 stops23h 15m
Multiple Airlines
Deal found 24/4£528
Mon 1/608:30
STN
-
SEA
1 stop16h 40m
Multiple Airlines
Tue 30/619:10
SEA
-
STN
1 stop19h 10m
Multiple Airlines
Deal found 24/4£528
Fri 12/606:35
STN
-
SEA
1 stop18h 35m
Multiple Airlines
Mon 22/619:10
SEA
-
STN
1 stop16h 15m
Multiple Airlines
Deal found 28/4£537
Thu 30/406:30
STN
-
SEA
3 stops35h 10m
Multiple Airlines
Mon 8/615:40
SEA
-
STN
2 stops24h 40m
Multiple Airlines
Deal found 24/4£560
Fri 22/506:35
STN
-
SEA
2 stops35h 05m
Multiple Airlines
Tue 26/515:40
SEA
-
STN
2 stops24h 30m
Multiple Airlines
Deal found 26/4£565
Wed 29/407:00
STN
-
SEA
2 stops21h 40m
Multiple Airlines
Wed 6/515:40
SEA
-
STN
2 stops17h 30m
Multiple Airlines
Deal found 24/4£571
Sat 9/506:35
STN
-
SEA
3 stops35h 05m
Multiple Airlines
Mon 18/515:40
SEA
-
STN
2 stops24h 40m
Multiple Airlines
Deal found 27/4£576
Fri 22/511:30
STN
-
SEA
2 stops34h 15m
Multiple Airlines
Fri 29/515:55
SEA
-
STN
3 stops23h 25m
Multiple Airlines
Deal found 23/4£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 28 April 2026.

Round-trip from

£522

One-way from

£399

Popular in

July

Cheapest in

February

Average price

£542
22/5-25/5
  • 22/5-25/5
  • 4 total stops
  • 56h 25m total
  • London to Seattle
Search Deals
25/6
  • 25/6
  • 3 total stops
  • 17h 17m total
  • London to Seattle
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£51 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 April 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 April 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
Fastest return journey

LondonSeattle

STN - SEA

STNSEA

London Stansted

Tue 22/9

11:00-16:59

1 stop13h 59m

Seattle/Tacoma Intl

Sun 27/9

18:50-15:35

1 stop12h 45m

£650

LondonSeattle

STN - SEA

STNSEA

London Stansted

Sat 26/9

17:45-17:15

1 stop31h 30m

Seattle/Tacoma Intl

Thu 22/10

19:10-09:55

1 stop30h 45m

£787

LondonSeattle

STN - SEA

STNSEA

London Stansted

Thu 4/6

17:35-17:15

1 stop31h 40m

Seattle/Tacoma Intl

Sat 13/6

19:10-09:55

1 stop30h 45m

£821

LondonSeattle

STN - SEA

STNSEA

London Stansted

Tue 30/6

06:55-17:15

1 stop18h 20m

Seattle/Tacoma Intl

Thu 30/7

19:10-16:50

1 stop37h 40m

£849

LondonSeattle

STN - SEA

STNSEA

London Stansted

Thu 1/10

17:35-17:15

1 stop31h 40m

Seattle/Tacoma Intl

Thu 15/10

08:40-16:50

2 stops48h 10m

£858

LondonSeattle

STN - SEA

STNSEA

London Stansted

Wed 9/9

10:50-17:15

1 stop38h 25m

Seattle/Tacoma Intl

Tue 22/9

19:10-16:40

1 stop37h 30m

£877

LondonSeattle

STN - SEA

STNSEA

London Stansted

Fri 8/5

17:35-21:06

2 stops35h 31m

Seattle/Tacoma Intl

Wed 1/7

19:10-16:40

1 stop37h 30m

£925
Cheapest one-way

LondonSeattle

STN - SEA

STNSEA

London Stansted

Sat 13/6

08:05-18:30

3 stops18h 25m

£406

LondonSeattle

STN - SEA

STNSEA

London Stansted

Sat 16/5

17:45-17:45

2 stops32h 00m

£450

LondonSeattle

STN - SEA

STNSEA

London Stansted

Sun 26/7

06:35-18:45

3 stops44h 10m

£459

Flights are sorted by cheapest return flights first.

Deals found on 24/4

Showing 1-10 of 15 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 £650, Lufthansa can have you in Seattle from London Stansted Airport in 13h 59m. The distance from London Stansted Airport to Seattle is about 4778 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • 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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