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Cheap flights from Seattle to London from $259

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to London departing on 10/8. 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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Find the cheapest flights from Seattle to London (SEA-LTN)

Cheap round-trip flights

Logo
2:35 pm - 4:45 pmSEA-LTN
18h 10m2 stops
Logo
9:00 am - 5:00 pmLTN-SEA
16h 00m2 stops
$522
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dom., nov. 2 - jue., nov. 6
Logo
3:35 pm - 4:05 pmSEA-LTN
17h 30m2 stops
Logo
6:50 am - 5:00 pmLTN-SEA
18h 10m2 stops
$544
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sáb., nov. 1 - mié., nov. 5
Logo
3:45 pm - 1:30 pmSEA-LTN
13h 45m1 stop
Logo
7:30 am - 5:00 pmLTN-SEA
17h 30m1 stop
$550
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mié., nov. 12 - mié., nov. 26
Logo
2:35 pm - 1:30 pmSEA-LTN
14h 55m1 stop
Logo
7:30 am - 5:00 pmLTN-SEA
17h 30m1 stop
$559
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mié., nov. 12 - mié., nov. 19
Logo
2:35 pm - 2:25 pmSEA-LTN
15h 50m1 stop
Logo
7:00 am - 5:00 pmLTN-SEA
18h 00m1 stop
$562
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mar., nov. 4 - mar., nov. 11
Logo
2:35 pm - 2:00 pmSEA-LTN
15h 25m1 stop
Logo
6:00 am - 5:00 pmLTN-SEA
19h 00m1 stop
$569
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lun., nov. 10 - dom., nov. 23
Logo
2:35 pm - 2:50 pmSEA-LTN
16h 15m1 stop
Logo
6:30 am - 5:00 pmLTN-SEA
18h 30m1 stop
$581
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dom., nov. 16 - jue., nov. 20
Logo
9:05 pm - 9:40 pmSEA-LTN
17h 35m1 stop
Logo
6:50 am - 6:20 pmLTN-SEA
19h 30m1 stop
$591
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mié., oct. 29 - mié., nov. 5
Logo
5:30 am - 12:35 pmSEA-LTN
23h 05m3 stops
Logo
9:50 pm - 6:36 pmLTN-SEA
28h 46m2 stops
$592
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mar., sep. 9 - mar., sep. 16
Logo
7:15 am - 4:00 pmSEA-LTN
24h 45m2 stops
Logo
9:55 pm - 6:36 pmLTN-SEA
28h 41m3 stops
$610
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lun., sep. 22 - lun., oct. 6

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to London Luton Airport 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 832,500 searches. Data last updated agosto 14, 2025.
Use the filters below to find and compare flights from Seattle to London Luton Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleLondon

SEA - LTN

SEALTN

Seattle/Tacoma Intl

dom. 11/2

2:35 pm-4:45 pm

2 stops18h 10m

London Luton

jue. 11/6

9:00 am-5:00 pm

2 stops16h 00m

$522

SeattleLondon

SEA - LTN

SEALTN

Seattle/Tacoma Intl

sáb. 11/1

3:35 pm-4:05 pm

2 stops17h 30m

London Luton

mié. 11/5

6:50 am-5:00 pm

2 stops18h 10m

$544

SeattleLondon

SEA - LTN

SEALTN

Seattle/Tacoma Intl

mié. 11/12

3:45 pm-1:30 pm

1 stop13h 45m

London Luton

mié. 11/26

7:30 am-5:00 pm

1 stop17h 30m

$550

SeattleLondon

SEA - LTN

SEALTN

Seattle/Tacoma Intl

mié. 11/12

2:35 pm-1:30 pm

1 stop14h 55m

London Luton

mié. 11/19

7:30 am-5:00 pm

1 stop17h 30m

$559

SeattleLondon

SEA - LTN

SEALTN

Seattle/Tacoma Intl

mar. 11/4

2:35 pm-2:25 pm

1 stop15h 50m

London Luton

mar. 11/11

7:00 am-5:00 pm

1 stop18h 00m

$562

SeattleLondon

SEA - LTN

SEALTN

Seattle/Tacoma Intl

lun. 11/10

2:35 pm-2:00 pm

1 stop15h 25m

London Luton

dom. 11/23

6:00 am-5:00 pm

1 stop19h 00m

$569

SeattleLondon

SEA - LTN

SEALTN

Seattle/Tacoma Intl

dom. 11/16

2:35 pm-2:50 pm

1 stop16h 15m

London Luton

jue. 11/20

6:30 am-5:00 pm

1 stop18h 30m

$581

SeattleLondon

SEA - LTN

SEALTN

Seattle/Tacoma Intl

mié. 10/29

9:05 pm-9:40 pm

1 stop17h 35m

London Luton

mié. 11/5

6:50 am-6:20 pm

1 stop19h 30m

$591

SeattleLondon

SEA - LTN

SEALTN

Seattle/Tacoma Intl

mar. 9/9

5:30 am-12:35 pm

3 stops23h 05m

London Luton

mar. 9/16

9:50 pm-6:36 pm

2 stops28h 46m

$592

SeattleLondon

SEA - LTN

SEALTN

Seattle/Tacoma Intl

lun. 9/22

7:15 am-4:00 pm

2 stops24h 45m

London Luton

lun. 10/6

9:55 pm-6:36 pm

3 stops28h 41m

$610

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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When to book flights from Seattle to London Luton Airport

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

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

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

Best Price Found

$259

Fastest flight time

12h 35m

Direct flights

None
The best one-way flight to London Luton Airport from Seattle in the past 72 hours is $259. The best round-trip flight deal from Seattle to London Luton Airport found on momondo in the last 72 hours is $522.
The fastest flight from Seattle to London Luton Airport takes 12h 35m
There are no direct flights from Seattle to London Luton Airport. Popular non-direct route for this connection is Seattle/Tacoma Intl Airport - London Luton Airport.
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  • How far is Seattle/Tacoma Intl to London Luton by plane?

    There are 4754.4 mi between Seattle/Tacoma Intl and London Luton. By plane, this route typically takes 12h 35m.

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

    Prices for flights from Seattle/Tacoma Intl Airport to London Luton Airport are refreshed on a daily basis.

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to London Luton Airport.

  • What documentation or ID do you need to fly to London Luton Airport?

    The travel and health documents you'll need for your trip to London Luton 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 London Luton Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • How do I get Price Alerts for flights from Seattle to London Luton Airport?

    Confirm your travel details to search for the latest offers for flights from Seattle to London Luton Airport. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

  • How can I save money on flights from Seattle to London Luton Airport with momondo?

    By using tools like our “Price Calendar”, you can see the best day to fly round-trip for your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

  • How does momondo find its flight prices?

    We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Hounslow
Gatwick
Dover
Slough
Luton
Guildford
Milton Keynes
Dartford
Crawley
Hayes
Chelmsford
Stansted
Brentwood
Ilford
Colchester
Folkestone
Watford
Richmond
Canterbury
Wembley

Why use momondo?

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

It is quick and easy to find Seattle to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.

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

Yes. momondo allows you to filter the results for Seattle to London flights to just show those with flexible booking policies.

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

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 Seattle to London.

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

Of course. momondo tracks the price of Seattle to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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