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Cheap flights from London Luton Airport to Seattle from £422

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 10/12. Fares are subject to change and may not be available on all flights or dates of travel.
LTN — SEA
8 Dec — 15 Dec1
1 adult
1 adult, Economy, 0 bags

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 8 November 2025.

Round-trip from

£649

One-way from

£422

Popular in

July

Cheapest in

January

Average price

£545
31/3-9/4
  • 31/3-9/4
  • 5 total stops
  • 57h 34m total
  • London to Seattle
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10/12
  • 10/12
  • 2 total stops
  • 33h 37m 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

Find flight deals from Luton to Seattle

Enter your travel dates to find the best prices.

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 8 November 2025.

Wed 3/1220:50LTN - SEA
2 stops26h 50mMultiple Airlines
Sat 6/1215:20SEA - LTN
2 stops17h 35mMultiple Airlines
Deal found 6/11£738
Wed 12/1106:50LTN - SEA
1 stop19h 30mMultiple Airlines
Wed 19/1120:05SEA - LTN
1 stop19h 00mMultiple Airlines
Deal found 7/11£754
Mon 17/1107:00LTN - SEA
2 stops16h 40mMultiple Airlines
Mon 8/1215:10SEA - LTN
2 stops20h 50mMultiple Airlines
Deal found 7/11£758
Tue 16/1209:00LTN - SEA
2 stops16h 00mMultiple Airlines
Sat 10/114:35SEA - LTN
2 stops23h 50mMultiple Airlines
Deal found 7/11£772
Sat 13/1207:20LTN - SEA
3 stops46h 56mMultiple Airlines
Tue 6/115:10SEA - LTN
2 stops18h 40mMultiple Airlines
Deal found 6/11£773
Mon 15/1208:00LTN - SEA
1 stop17h 00mMultiple Airlines
Thu 8/110:05SEA - LTN
3 stops23h 10mMultiple Airlines
Deal found 6/11£777
Mon 15/1208:00LTN - SEA
1 stop17h 00mMultiple Airlines
Tue 6/110:05SEA - LTN
3 stops23h 45mMultiple Airlines
Deal found 5/11£788

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 8 November 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

Tue 31/3

08:05-14:19

3 stops38h 14m

Seattle/Tacoma Intl

Thu 9/4

19:00-22:20

2 stops19h 20m

£649

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Sat 28/3

06:00-14:19

3 stops39h 19m

Seattle/Tacoma Intl

Sat 11/4

15:45-22:30

2 stops22h 45m

£681

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Mon 30/3

06:45-23:08

3 stops24h 23m

Seattle/Tacoma Intl

Thu 9/4

19:00-22:20

2 stops19h 20m

£737

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Wed 3/12

20:50-15:40

2 stops26h 50m

Seattle/Tacoma Intl

Sat 6/12

15:20-16:55

2 stops17h 35m

£738

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Thu 30/4

09:10-20:28

2 stops19h 18m

Seattle/Tacoma Intl

Sat 9/5

15:45-00:05

2 stops24h 20m

£738

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Tue 16/12

09:00-17:00

2 stops16h 00m

Seattle/Tacoma Intl

Sat 10/1

14:35-22:25

2 stops23h 50m

£772

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Sat 13/12

07:20-22:16

3 stops46h 56m

Seattle/Tacoma Intl

Tue 6/1

15:10-17:50

2 stops18h 40m

£773

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Mon 15/12

08:00-17:00

1 stop17h 00m

Seattle/Tacoma Intl

Tue 6/1

10:05-17:50

3 stops23h 45m

£788

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Wed 10/12

08:15-09:52

2 stops33h 37m

£422

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Sun 19/4

06:50-20:45

1 stop21h 55m

£425

Flights are sorted by cheapest return flights first.

Deals found on 6/11

Showing 1-10 of 18 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.

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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