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Cheap flights from London Luton Airport to Seattle from £341

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Luton Airport to Seattle departing on 5/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags
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Find the cheapest flights from London Luton Airport to Seattle

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
09:40 - 17:55
LTN
-
SEA
16h 15m
2 stops
Multiple Airlines Logo
15:40 - 15:30
SEA
-
LTN
15h 50m
2 stops
£432Multiple Airlines
Tue, 7 Apr - Tue, 14 Apr
Multiple Airlines Logo
19:05 - 19:23
LTN
-
SEA
32h 18m
2 stops
Multiple Airlines Logo
18:55 - 15:30
SEA
-
LTN
12h 35m
1 stop
£449Multiple Airlines
Wed, 22 Apr - Tue, 5 May
Multiple Airlines Logo
08:30 - 09:40
LTN
-
SEA
33h 10m
2 stops
Multiple Airlines Logo
19:00 - 22:20
SEA
-
LTN
19h 20m
2 stops
£496Multiple Airlines
Sun, 3 May - Sun, 17 May
Multiple Airlines Logo
06:15 - 19:19
LTN
-
SEA
21h 04m
2 stops
Multiple Airlines Logo
18:55 - 15:30
SEA
-
LTN
12h 35m
1 stop
£527Multiple Airlines
Wed, 13 May - Tue, 19 May
Multiple Airlines Logo
18:40 - 19:25
LTN
-
SEA
32h 45m
2 stops
Multiple Airlines Logo
19:10 - 15:30
SEA
-
LTN
12h 20m
1 stop
£537Multiple Airlines
Mon, 20 Apr - Tue, 19 May
Multiple Airlines Logo
11:00 - 17:10
LTN
-
SEA
14h 10m
1 stop
Multiple Airlines Logo
18:55 - 15:30
SEA
-
LTN
12h 35m
1 stop
£538Multiple Airlines
Sat, 2 May - Tue, 12 May
Multiple Airlines Logo
08:30 - 09:40
LTN
-
SEA
33h 10m
2 stops
Multiple Airlines Logo
19:10 - 08:20
SEA
-
LTN
29h 10m
1 stop
£540Multiple Airlines
Sun, 3 May - Fri, 15 May
Multiple Airlines Logo
08:30 - 22:20
LTN
-
SEA
21h 50m
3 stops
Multiple Airlines Logo
19:00 - 22:20
SEA
-
LTN
19h 20m
2 stops
£541Multiple Airlines
Sun, 3 May - Sun, 17 May
Multiple Airlines Logo
07:20 - 22:57
LTN
-
SEA
22h 37m
3 stops
Multiple Airlines Logo
15:35 - 22:10
SEA
-
LTN
23h 35m
2 stops
£562Multiple Airlines
Mon, 9 Mar - Tue, 24 Mar
Multiple Airlines Logo
11:00 - 17:10
LTN
-
SEA
14h 10m
1 stop
Multiple Airlines Logo
18:55 - 21:55
SEA
-
LTN
19h 00m
1 stop
£566Multiple Airlines
Sat, 9 May - Sat, 16 May

momondo Fare Finder

 
Customise your flight search to find flights from London Luton Airport 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, momondo users made 279,928 searches. Data last updated 8 February 2026.
Use the filters below to find and compare flights from London Luton Airport to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Tue 7/4

09:40-17:55

2 stops16h 15m

Seattle/Tacoma Intl

Tue 14/4

15:40-15:30

2 stops15h 50m

£432

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Wed 22/4

19:05-19:23

2 stops32h 18m

Seattle/Tacoma Intl

Tue 5/5

18:55-15:30

1 stop12h 35m

£449

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Sun 3/5

08:30-09:40

2 stops33h 10m

Seattle/Tacoma Intl

Sun 17/5

19:00-22:20

2 stops19h 20m

£496

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Wed 13/5

06:15-19:19

2 stops21h 04m

Seattle/Tacoma Intl

Tue 19/5

18:55-15:30

1 stop12h 35m

£527

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Mon 20/4

18:40-19:25

2 stops32h 45m

Seattle/Tacoma Intl

Tue 19/5

19:10-15:30

1 stop12h 20m

£537

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Sat 2/5

11:00-17:10

1 stop14h 10m

Seattle/Tacoma Intl

Tue 12/5

18:55-15:30

1 stop12h 35m

£538

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Sun 3/5

08:30-09:40

2 stops33h 10m

Seattle/Tacoma Intl

Fri 15/5

19:10-08:20

1 stop29h 10m

£540

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Sun 3/5

08:30-22:20

3 stops21h 50m

Seattle/Tacoma Intl

Sun 17/5

19:00-22:20

2 stops19h 20m

£541

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Mon 9/3

07:20-22:57

3 stops22h 37m

Seattle/Tacoma Intl

Tue 24/3

15:35-22:10

2 stops23h 35m

£562

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Sat 9/5

11:00-17:10

1 stop14h 10m

Seattle/Tacoma Intl

Sat 16/5

18:55-21:55

1 stop19h 00m

£566

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seattle from

How to get the cheapest flight ticket from London Luton Airport to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Seattle?

According to our data, Wednesday is the cheapest day to fly to Seattle from London Luton Airport. The lowest ticket price found for a Wednesday departure recently was £578. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Seattle on Sunday is £646.

What is the cheapest time of day to depart on your flight to Seattle?

According to our data, the cheapest time of day to fly to Seattle is in the morning. momondo users have found flights departing from London Luton Airport to Seattle in the morning for as low as £601. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the afternoon are often more expensive, with an average ticket price of £612.

When to book flights from London Luton Airport to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from London Luton Airport to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London Luton Airport to Seattle (LTN to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Luton Airport to Seattle

Fastest flight time

13h 20m

Direct flights

None
The fastest flight from London Luton Airport to Seattle takes 13h 20m
There are no direct flights from London Luton Airport to Seattle. There are no popular flight routes from London Luton Airport to Seattle.
Search flight deals

  • How far is London Luton to Seattle/Tacoma Intl by plane?

    There are 4754.4 mi between London Luton and Seattle/Tacoma Intl. A reasonable flight in good conditions will take 13h 20m.

  • When did momondo last update prices for flights from London Luton Airport to Seattle/Tacoma Intl Airport?

    Prices for flights from London Luton Airport to Seattle/Tacoma Intl Airport refresh daily.

  • How old do you have to be to fly from London Luton Airport to Seattle/Tacoma Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Luton Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Fife
SeaTac
Tukwila

Why use momondo?

Why should I use momondo to find a flight deal from London to Seattle?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from London to Seattle . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from London to Seattle with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Seattle from London with this policy.

How can momondo help me find flights from London to Seattle?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to Seattle.

I’m not ready to book a flight from London to Seattle right now. Can momondo alert me if prices change?

If you are not ready to book a flight from London to Seattle now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Seattle and let you know when they change.

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