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Cheap flights from London Luton Airport to Seattle from £374

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 15/12. Fares are subject to change and may not be available on all flights or dates of travel.
LTN — SEA
12 Oct — 19 Oct1
1 adult
1 adult, Economy

Cheap flight deals from Luton to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Luton (LTN) 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 12 September 2025.

Round-trip from

£506

One-way from

£375

Popular in

August

Cheapest in

January

Average price

£512
1/12-8/12
  • 1/12-8/12
  • 2 total stops
  • 32h 25m total
  • London to Seattle
Search Deals
21/10
  • 21/10
  • 3 total stops
  • 35h 39m total
  • London to Seattle
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£59 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from Luton to Seattle

Cheapest flights from Luton to Seattle
Explore the most affordable flight options available from Luton to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 September 2025.

Mon 1/1208:00LTN - SEA
1 stop17h 00mMultiple Airlines
Mon 8/1214:35SEA - LTN
1 stop15h 25mMultiple Airlines
Deal found 9/9£506
Fri 19/921:05LTN - SEA
2 stops25h 11mMultiple Airlines
Fri 3/1010:00SEA - LTN
2 stops19h 35mMultiple Airlines
Deal found 10/9£514
Mon 6/1009:00LTN - SEA
2 stops16h 50mMultiple Airlines
Fri 10/1015:45SEA - LTN
2 stops16h 00mMultiple Airlines
Deal found 10/9£546
Sun 26/1008:05LTN - SEA
2 stops16h 55mMultiple Airlines
Sun 2/1114:35SEA - LTN
2 stops23h 25mMultiple Airlines
Deal found 11/9£585
Wed 24/910:00LTN - SEA
2 stops17h 21mMultiple Airlines
Wed 1/1016:20SEA - LTN
2 stops18h 45mMultiple Airlines
Deal found 10/9£626
Thu 9/1006:05LTN - SEA
2 stops22h 35mMultiple Airlines
Thu 16/1015:45SEA - LTN
2 stops19h 40mMultiple Airlines
Deal found 11/9£634
Thu 16/1006:05LTN - SEA
2 stops22h 35mMultiple Airlines
Mon 20/1019:00SEA - LTN
2 stops19h 15mMultiple Airlines
Deal found 11/9£656

Cheapflights Fare Finder

 
Customise your flight search to find flights from Luton 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 12 September 2025.
Use the filters below to find and compare flights from London Luton Airport to Seattle that are best for you.

Fly from

Luton

Fly to

Seattle

Route

Depart

Return

Price

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Mon 1/12

08:00-17:00

1 stop17h 00m

Seattle/Tacoma Intl

Mon 8/12

14:35-14:00

1 stop15h 25m

£506

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Sun 26/10

08:05-18:00

2 stops16h 55m

Seattle/Tacoma Intl

Sun 2/11

14:35-22:00

2 stops23h 25m

£585

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Wed 24/9

10:00-19:21

2 stops17h 21m

Seattle/Tacoma Intl

Wed 1/10

16:20-19:05

2 stops18h 45m

£626

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Thu 16/10

06:05-20:40

2 stops22h 35m

Seattle/Tacoma Intl

Mon 20/10

19:00-22:15

2 stops19h 15m

£656

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Sun 5/10

09:55-12:59

2 stops35h 04m

Seattle/Tacoma Intl

Thu 9/10

08:40-16:35

2 stops23h 55m

£701

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Tue 21/10

18:00-11:15

2 stops25h 15m

Seattle/Tacoma Intl

Tue 4/11

13:40-21:00

2 stops23h 20m

£704

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Wed 22/10

06:25-16:59

2 stops18h 34m

Seattle/Tacoma Intl

Wed 29/10

16:10-15:20

2 stops16h 10m

£712

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Mon 15/12

07:20-07:00

3 stops31h 40m

£374

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Tue 21/10

07:10-10:49

3 stops35h 39m

£375

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Mon 10/11

21:50-10:25

2 stops44h 35m

£397

Flights are sorted by cheapest return flights first.

Deals found on 10/9

Showing 1-10 of 16 results
1
2

Best time to book a flight from Luton to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Luton 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 Luton 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 Luton?

    Most people fly into Seattle/Tacoma Intl (SEA) if they book a flight to Seattle from London Luton. On average, Seattle/Tacoma Intl has 0 inbound flights from London Luton 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 Luton to Seattle that include hotel bookings?

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

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

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

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

    Yes. Cheapflights offers flight deals from Luton 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.

  • What is the cheapest month to book a flight from London Luton Airport to Seattle?

    Currently, January is the cheapest month in which you can book a flight from London Luton Airport to Seattle (average of £622). Flying from London Luton Airport to Seattle in July is currently the most expensive (average of £946). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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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Yes! Cheapflights helps users easily find flights from Luton to Seattle with no change fees.

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