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Cheap flights from London Heathrow Airport to Seattle from C$ 529

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 Heathrow Airport to Seattle departing on 20/1. 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 London Heathrow Airport to Seattle

Cheap round-trip flights

These are some of the best round-trip flight deals from London Heathrow Airport to Seattle that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from London Heathrow Airport to Seattle.

Cheap last-minute flights

Planning a quick getaway from London Heathrow Airport to Seattle? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to Seattle, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from London Heathrow Airport to Seattle

Find recent round-trip train or bus tickets from London Heathrow Airport to Seattle.

All round-trip flight deals to Seattle

The cheapest plane tickets to Seattle found on KAYAK recently.
12:15 p.m. - 5:00 p.m.LHR-SEA
12h 45m1 stop
2:35 p.m. - 10:50 a.m.SEA-LHR
12h 15m1 stop
C$ 704Icelandair
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Fri, 31 Jan - Sat, 8 Feb
12:15 p.m. - 5:00 p.m.LHR-SEA
12h 45m1 stop
2:35 p.m. - 7:30 p.m.SEA-LHR
20h 55m1 stop
C$ 706Icelandair
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Thu, 23 Jan - Thu, 30 Jan
6:35 a.m. - 1:20 p.m.LHR-SEA
14h 45m1 stop
5:00 a.m. - 6:55 a.m.SEA-LHR
17h 55m2 stops
C$ 744United Airlines
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Tue, 21 Jan - Tue, 28 Jan
6:30 a.m. - 12:10 p.m.LHR-SEA
13h 40m1 stop
7:00 a.m. - 11:15 a.m.SEA-LHR
20h 15m1 stop
C$ 746
Find Deal
Mon, 20 Jan - Mon, 27 Jan
12:05 p.m. - 10:53 p.m.LHR-SEA
42h 48m2 stops
7:00 a.m. - 9:40 a.m.SEA-LHR
42h 40m2 stops
C$ 747Austrian Airlines
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Sun, 26 Jan - Mon, 10 Feb
8:05 p.m. - 9:20 p.m.LHR-SEA
33h 15m2 stops
12:37 p.m. - 9:40 p.m.SEA-LHR
25h 03m2 stops
C$ 750SWISS
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Sun, 2 Feb - Wed, 19 Feb
6:50 a.m. - 8:31 p.m.LHR-SEA
21h 41m2 stops
7:08 a.m. - 6:20 a.m.SEA-LHR
15h 12m1 stop
C$ 753United Airlines
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Wed, 5 Feb - Wed, 12 Feb
8:55 a.m. - 10:42 p.m.LHR-SEA
21h 47m2 stops
10:52 a.m. - 1:00 p.m.SEA-LHR
42h 08m2 stops
C$ 799SWISS
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Fri, 28 Feb - Sun, 2 Mar
7:25 p.m. - 10:53 p.m.LHR-SEA
35h 28m2 stops
7:00 a.m. - 9:40 a.m.SEA-LHR
42h 40m2 stops
C$ 828Austrian Airlines
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Thu, 16 Jan - Mon, 20 Jan
12:05 p.m. - 8:31 p.m.LHR-SEA
16h 26m1 stop
10:52 a.m. - 7:55 a.m.SEA-LHR
13h 03m1 stop
C$ 846
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Thu, 9 Jan - Mon, 24 Feb
2:50 p.m. - 2:21 p.m.LHR-SEA
31h 31m1 stop
C$ 529WestJet
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Mon, 20 Jan
2:50 p.m. - 10:00 a.m.LHR-SEA
27h 10m2 stops
C$ 672WestJet
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Fri, 31 Jan
2:50 p.m. - 8:45 p.m.LHR-SEA
37h 55m2 stops
C$ 704WestJet
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Mon, 20 Jan
2:50 p.m. - 2:38 p.m.LHR-SEA
31h 48m1 stop
C$ 760WestJet
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Fri, 24 Jan
6:30 a.m. - 6:15 p.m.LHR-SEA
19h 45m1 stop
C$ 861Aer Lingus
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Fri, 3 Jan
7:55 p.m. - 10:00 p.m.LHR-SEA
34h 05m2 stops
C$ 1,273TAP AIR PORTUGAL
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Sun, 12 Jan
8:15 a.m. - 11:16 a.m.LHR-SEA
35h 01m3 stops
C$ 1,287
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Thu, 6 Feb
7:55 p.m. - 11:16 a.m.LHR-SEA
47h 21m3 stops
C$ 1,290TAP AIR PORTUGAL
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Fri, 31 Jan
11:20 a.m. - 11:08 a.m.LHR-SEA
31h 48m3 stops
C$ 1,295
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Sat, 26 Apr
8:25 a.m. - 10:38 p.m.LHR-SEA
22h 13m1 stop
C$ 1,300JetBlue
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Fri, 21 Feb
6:30 a.m. - 11:52 a.m.LHR-SEA
13h 22m1 stop
7:04 p.m. - 12:40 p.m.SEA-LHR
9h 36mdirect
C$ 1,411KLM
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Sat, 28 Dec - Wed, 8 Jan
6:20 a.m. - 12:09 p.m.LHR-SEA
13h 49m1 stop
5:45 p.m. - 11:10 a.m.SEA-LHR
9h 25mdirect
C$ 1,474Delta
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Fri, 27 Dec - Sat, 11 Jan
3:50 p.m. - 6:30 p.m.LHR-SEA
10h 40mdirect
5:45 p.m. - 11:10 a.m.SEA-LHR
9h 25mdirect
C$ 1,490Virgin Atlantic
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Fri, 27 Dec - Sat, 11 Jan
6:40 a.m. - 10:24 p.m.LHR-SEA
23h 44m2 stops
1:35 p.m. - 4:00 p.m.SEA-LHR
18h 25m2 stops
C$ 1,535Scandinavian Airlines
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Wed, 25 Dec - Fri, 10 Jan
1:00 p.m. - 6:25 p.m.LHR-SEA
13h 25m1 stop
7:00 a.m. - 7:55 a.m.SEA-LHR
16h 55m1 stop
C$ 1,562
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Wed, 25 Dec - Thu, 9 Jan
3:00 p.m. - 4:55 p.m.LHR-SEA
9h 55mdirect
7:14 a.m. - 6:20 a.m.SEA-LHR
15h 06m1 stop
C$ 1,582Finnair
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Wed, 25 Dec - Thu, 9 Jan
1:05 p.m. - 3:05 p.m.LHR-SEA
10h 00mdirect
5:45 p.m. - 11:10 a.m.SEA-LHR
9h 25mdirect
C$ 1,592Virgin Atlantic
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Sat, 28 Dec - Wed, 8 Jan
1:00 p.m. - 6:25 p.m.LHR-SEA
13h 25m1 stop
11:05 a.m. - 7:55 a.m.SEA-LHR
12h 50m1 stop
C$ 1,616
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Wed, 25 Dec - Fri, 10 Jan
3:00 p.m. - 4:55 p.m.LHR-SEA
9h 55mdirect
1:45 p.m. - 7:10 a.m.SEA-LHR
9h 25mdirect
C$ 1,637Finnair
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Wed, 25 Dec - Sat, 11 Jan
6:40 a.m. - 9:51 p.m.LHR-SEA
23h 11m2 stops
1:35 p.m. - 4:00 p.m.SEA-LHR
18h 25m2 stops
C$ 1,806Scandinavian Airlines
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Sat, 28 Dec - Fri, 10 Jan
9:25 a.m. - 11:20 a.m.LHR-SEA
9h 55mdirect
6:50 p.m. - 12:15 p.m.SEA-LHR
9h 25mdirect
C$ 787British Airways
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Tue, 21 Jan - Tue, 28 Jan
9:50 a.m. - 11:35 a.m.LHR-SEA
9h 45mdirect
1:30 p.m. - 6:50 a.m.SEA-LHR
9h 20mdirect
C$ 796British Airways
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Mon, 21 Apr - Mon, 28 Apr
3:00 p.m. - 4:55 p.m.LHR-SEA
9h 55mdirect
6:50 p.m. - 12:15 p.m.SEA-LHR
9h 25mdirect
C$ 802Finnair
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Mon, 3 Feb - Mon, 17 Feb
3:00 p.m. - 4:55 p.m.LHR-SEA
9h 55mdirect
6:50 p.m. - 12:15 p.m.SEA-LHR
9h 25mdirect
C$ 831Finnair
Find Deal
Mon, 3 Feb - Mon, 17 Feb
1:05 p.m. - 3:05 p.m.LHR-SEA
10h 00mdirect
5:45 p.m. - 11:10 a.m.SEA-LHR
9h 25mdirect
C$ 866Virgin Atlantic
Find Deal
Sun, 26 Jan - Mon, 10 Feb
5:00 p.m. - 7:35 p.m.LHR-SEA
10h 35mdirect
7:55 p.m. - 1:30 p.m.SEA-LHR
9h 35mdirect
C$ 917Delta
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Thu, 17 Apr - Mon, 28 Apr
1:05 p.m. - 3:05 p.m.LHR-SEA
10h 00mdirect
5:45 p.m. - 11:10 a.m.SEA-LHR
9h 25mdirect
C$ 921Delta
Find Deal
Sat, 11 Jan - Sat, 18 Jan
5:00 p.m. - 7:35 p.m.LHR-SEA
10h 35mdirect
7:55 p.m. - 1:30 p.m.SEA-LHR
9h 35mdirect
C$ 971KLM
Find Deal
Sat, 19 Apr - Sat, 26 Apr
5:00 p.m. - 7:35 p.m.LHR-SEA
10h 35mdirect
7:55 p.m. - 1:30 p.m.SEA-LHR
9h 35mdirect
C$ 1,013KLM
Find Deal
Thu, 17 Apr - Sat, 26 Apr
1:05 p.m. - 3:05 p.m.LHR-SEA
10h 00mdirect
5:45 p.m. - 11:10 a.m.SEA-LHR
9h 25mdirect
C$ 7,186Virgin Atlantic
Find Deal
Sun, 12 Jan - Sun, 19 Jan

Lufthansa flights from London Heathrow Airport to Seattle

Our best Lufthansa deals on London Heathrow Airport to Seattle flight tickets
Lufthansa
21 Apr
LHR6:30 a.m.London Heathrow
13h 55m
1 stop
SEA12:25 p.m.Seattle/Tacoma Intl
29 Apr
SEA2:18 p.m.Seattle/Tacoma Intl
13h 27m
1 stop
LHR11:45 a.m.London Heathrow
Lufthansa
13 Jan
LHR8:15 p.m.London Heathrow
25h 05m
1 stop
SEA1:20 p.m.Seattle/Tacoma Intl
27 Jan
SEA11:05 a.m.Seattle/Tacoma Intl
16h 10m
1 stop
LHR11:15 a.m.London Heathrow
Lufthansa
20 Apr
LHR9:00 a.m.London Heathrow
15h 59m
1 stop
SEA4:59 p.m.Seattle/Tacoma Intl
28 Apr
SEA2:18 p.m.Seattle/Tacoma Intl
13h 27m
1 stop
LHR11:45 a.m.London Heathrow

Finnair flights from London Heathrow Airport to Seattle

Our best Finnair deals on London Heathrow Airport to Seattle flight tickets
Finnair
3 Feb
LHR9:25 a.m.London Heathrow
18h 39m
1 stop
SEA8:04 p.m.Seattle/Tacoma Intl
17 Feb
SEA6:50 p.m.Seattle/Tacoma Intl
9h 25m
LHR12:15 p.m.London Heathrow
Finnair
16 Jan
LHR3:00 p.m.London Heathrow
9h 55m
SEA4:55 p.m.Seattle/Tacoma Intl
20 Jan
SEA7:14 a.m.Seattle/Tacoma Intl
15h 06m
1 stop
LHR6:20 a.m.London Heathrow
Finnair
19 Apr
LHR10:30 a.m.London Heathrow
16h 34m
1 stop
SEA7:04 p.m.Seattle/Tacoma Intl
29 Apr
SEA1:30 p.m.Seattle/Tacoma Intl
9h 20m
LHR6:50 a.m.London Heathrow

See travel insights to Seattle from

How to get the cheapest flight ticket from London Heathrow 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 month to fly to Seattle?

If you aren’t able to travel to Seattle during the month of January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of C$ 918.

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

Our data shows that Thursday is the least expensive day to fly to Seattle. Tickets to fly out on this day can be as low as C$ 0. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around C$ 2,655. These prices are subject to change though, so be sure to set up a Price Alert for flights to Seattle.

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

Our most recent data shows that the best time of day to fly to Seattle is at noon. Flights from London Heathrow Airport to Seattle during this time can be as low as C$ 0. Flights in the afternoon are often more expensive with an average ticket price of C$ 1,454.

What is the cheapest London Heathrow to Seattle/Tacoma Intl flight route?

Fly from London Heathrow to Seattle/Tacoma Intl for the best London Heathrow - Seattle/Tacoma Intl flight prices

How far in advance should I book a flight to Seattle?

We recommend purchasing flights from London Heathrow Airport to Seattle 54 days ahead of your departure date because this is when momondo users tend to see the best flight rates. On average, our users have found flights to Seattle for C$ 1,112. However, in the past 72 hours, people saw flights from London Heathrow Airport for as low as C$ 1,350.

What cabin class options are available on London Heathrow to Seattle/Tacoma Intl flights?

There are 1 cabin classes available to choose from on London Heathrow to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on London Heathrow Airport to Seattle flights?

You could potentially save up to 75% on your flight if you consider stops on a London Heathrow Airport to Seattle flight.

How have London Heathrow Airport to Seattle flight prices changed over time?

As of December 2024, prices for London Heathrow Airport to Seattle flights are approximately 18% more expensive when compared to flights at the same time last year.

When to book flights from London Heathrow Airport to Seattle

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

Cheap London Heathrow Airport to Seattle (LHR to SEA) flight deals and tips

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

Best price found

C$ 529

Fastest flight time

9h 45m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from London Heathrow Airport in the past 72 hours is C$ 529. The best round-trip flight deal from London Heathrow Airport to Seattle found on momondo in the last 72 hours is C$ 704.
The fastest flight from London Heathrow Airport to Seattle takes 9h 45m
Direct flights go from London Heathrow Airport to Seattle every day.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

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

    London Heathrow and Seattle/Tacoma Intl are 7683.2 km apart from one another. By plane, this route typically takes 9h 45m.

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

    Prices for flights from London Heathrow Airport to Seattle/Tacoma Intl Airport are updated daily.

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

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

    The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from London Heathrow Airport to Seattle?


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. All flights to Seattle from London on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Seattle from London.

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

Yes momondo offers price alerts on flights to Seattle from London. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.


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