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Cheap flights from Seattle to London from $284

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 10/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Seattle to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
5:40 pm - 9:05 pmSEA  Seattle/Tacoma Intl-LTN London Luton
19h 25m2 stops Frankfurt am Main Rome Fiumicino
Multiple Airlines Logo
9:50 pm - 4:00 pmLTN  London Luton-SEA Seattle/Tacoma Intl
26h 10m2 stops Rome Fiumicino Frankfurt am Main
$690Multiple Airlines
Wed, Oct 7 - Wed, Oct 14
Multiple Airlines Logo
5:40 pm - 9:05 pmSEA  Seattle/Tacoma Intl-LTN London Luton
19h 25m2 stops Frankfurt am Main Rome Fiumicino
Multiple Airlines Logo
9:50 pm - 3:40 pmLTN  London Luton-SEA Seattle/Tacoma Intl
25h 50m2 stops Rome Fiumicino Frankfurt am Main
$696Multiple Airlines
Wed, Oct 7 - Tue, Oct 13
Multiple Airlines Logo
3:40 pm - 9:40 pmSEA  Seattle/Tacoma Intl-LTN London Luton
22h 00m2 stops Reykjavik Keflavik Intl Dublin
Multiple Airlines Logo
6:20 am - 8:40 pmLTN  London Luton-SEA Seattle/Tacoma Intl
22h 20m2 stops Dublin Reykjavik Keflavik Intl
$706Multiple Airlines
Sun, Oct 4 - Fri, Oct 9
Multiple Airlines Logo
3:40 pm - 9:15 pmSEA  Seattle/Tacoma Intl-LTN London Luton
21h 35m2 stops Reykjavik Keflavik Intl Dublin
Multiple Airlines Logo
6:15 am - 5:55 pmLTN  London Luton-SEA Seattle/Tacoma Intl
19h 40m2 stops Dublin Reykjavik Keflavik Intl
$713Multiple Airlines
Wed, Sep 30 - Wed, Oct 7
Multiple Airlines Logo
3:40 pm - 9:15 pmSEA  Seattle/Tacoma Intl-LTN London Luton
21h 35m2 stops Reykjavik Keflavik Intl Dublin
Multiple Airlines Logo
6:15 am - 5:55 pmLTN  London Luton-SEA Seattle/Tacoma Intl
19h 40m2 stops Dublin Reykjavik Keflavik Intl
$729Multiple Airlines
Wed, Sep 30 - Wed, Oct 7
Multiple Airlines Logo
2:35 pm - 10:10 pmSEA  Seattle/Tacoma Intl-LTN London Luton
23h 35m2 stops Reykjavik Keflavik Intl Dublin
Multiple Airlines Logo
6:10 am - 5:00 pmLTN  London Luton-SEA Seattle/Tacoma Intl
18h 50m2 stops Dublin Reykjavik Keflavik Intl
$734Multiple Airlines
Sun, Nov 8 - Mon, Nov 16
Multiple Airlines Logo
2:35 pm - 8:00 pmSEA  Seattle/Tacoma Intl-LTN London Luton
21h 25m2 stops Reykjavik Keflavik Intl Dublin
Multiple Airlines Logo
7:45 am - 5:00 pmLTN  London Luton-SEA Seattle/Tacoma Intl
17h 15m2 stops Dublin Reykjavik Keflavik Intl
$736Multiple Airlines
Tue, Nov 10 - Tue, Nov 17
Multiple Airlines Logo
3:40 pm - 8:30 pmSEA  Seattle/Tacoma Intl-LTN London Luton
20h 50m2 stops Reykjavik Keflavik Intl Gdansk Rebiechowo
Multiple Airlines Logo
8:30 am - 8:40 pmLTN  London Luton-SEA Seattle/Tacoma Intl
20h 10m2 stops Gdansk Rebiechowo Reykjavik Keflavik Intl
$738Multiple Airlines
Sun, Oct 4 - Thu, Oct 8
Multiple Airlines Logo
3:40 pm - 9:15 pmSEA  Seattle/Tacoma Intl-LTN London Luton
21h 35m2 stops Reykjavik Keflavik Intl Dublin
Multiple Airlines Logo
6:15 am - 5:55 pmLTN  London Luton-SEA Seattle/Tacoma Intl
19h 40m2 stops Dublin Reykjavik Keflavik Intl
$744Multiple Airlines
Wed, Oct 7 - Wed, Oct 14
Multiple Airlines Logo
5:40 pm - 8:10 pmSEA  Seattle/Tacoma Intl-LTN London Luton
18h 30m2 stops Frankfurt am Main Venice Marco Polo
Multiple Airlines Logo
8:50 pm - 3:40 pmLTN  London Luton-SEA Seattle/Tacoma Intl
26h 50m2 stops Venice Marco Polo Frankfurt am Main
$750Multiple Airlines
Sun, Sep 27 - Mon, Oct 12

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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 August 18, 2026.
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

Cheapest round-trip

SeattleLondon

SEA Seattle/Tacoma Intl - LTN London Luton

SEALTN

Seattle/Tacoma Intl

Wed 10/7

5:40 pm-9:05 pm

2 stops19h 25m

London Luton

Wed 10/14

9:50 pm-4:00 pm

2 stops26h 10m

$690

SeattleLondon

SEA Seattle/Tacoma Intl - LTN London Luton

SEALTN

Seattle/Tacoma Intl

Wed 10/7

5:40 pm-9:05 pm

2 stops19h 25m

London Luton

Tue 10/13

9:50 pm-3:40 pm

2 stops25h 50m

$696

SeattleLondon

SEA Seattle/Tacoma Intl - LTN London Luton

SEALTN

Seattle/Tacoma Intl

Sun 10/4

3:40 pm-9:40 pm

2 stops22h 00m

London Luton

Fri 10/9

6:20 am-8:40 pm

2 stops22h 20m

$706

SeattleLondon

SEA Seattle/Tacoma Intl - LTN London Luton

SEALTN

Seattle/Tacoma Intl

Wed 9/30

3:40 pm-9:15 pm

2 stops21h 35m

London Luton

Wed 10/7

6:15 am-5:55 pm

2 stops19h 40m

$713

SeattleLondon

SEA Seattle/Tacoma Intl - LTN London Luton

SEALTN

Seattle/Tacoma Intl

Wed 9/30

3:40 pm-9:15 pm

2 stops21h 35m

London Luton

Wed 10/7

6:15 am-5:55 pm

2 stops19h 40m

$729

SeattleLondon

SEA Seattle/Tacoma Intl - LTN London Luton

SEALTN

Seattle/Tacoma Intl

Sun 11/8

2:35 pm-10:10 pm

2 stops23h 35m

London Luton

Mon 11/16

6:10 am-5:00 pm

2 stops18h 50m

$734
Quickest round-trip

SeattleLondon

SEA Seattle/Tacoma Intl - LTN London Luton

SEALTN

Seattle/Tacoma Intl

Tue 11/10

2:35 pm-8:00 pm

2 stops21h 25m

London Luton

Tue 11/17

7:45 am-5:00 pm

2 stops17h 15m

$736

SeattleLondon

SEA Seattle/Tacoma Intl - LTN London Luton

SEALTN

Seattle/Tacoma Intl

Sun 10/4

3:40 pm-8:30 pm

2 stops20h 50m

London Luton

Thu 10/8

8:30 am-8:40 pm

2 stops20h 10m

$738

SeattleLondon

SEA Seattle/Tacoma Intl - LTN London Luton

SEALTN

Seattle/Tacoma Intl

Wed 10/7

3:40 pm-9:15 pm

2 stops21h 35m

London Luton

Wed 10/14

6:15 am-5:55 pm

2 stops19h 40m

$744

SeattleLondon

SEA Seattle/Tacoma Intl - LTN London Luton

SEALTN

Seattle/Tacoma Intl

Sun 9/27

5:40 pm-8:10 pm

2 stops18h 30m

London Luton

Mon 10/12

8:50 pm-3:40 pm

2 stops26h 50m

$750

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 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

$284

Fastest flight time

13h 20m

Direct flights

None
The best one-way flight to London Luton Airport from Seattle in the past 72 hours is $284. The best round-trip flight deal from Seattle to London Luton Airport found on momondo in the last 72 hours is $690.
The fastest flight from Seattle to London Luton Airport takes 13h 20m
There are no direct flights from Seattle to London Luton Airport. There are no popular flight routes from Seattle to London Luton Airport.
Search flight deals

Frequently asked questions about flying from Seattle to London Luton Airport

  • 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 13h 20m.

  • 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.

Frequently asked questions about flying from Seattle to London Luton Airport

  • 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
Milton Keynes
Luton
Hayes
Wembley
Croydon
Dover
Stansted
Richmond
Kingston upon Thames
Harrow
Watford
Cobham
Slough
Uxbridge
Worthing
Romford
Ilford
Bedford

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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