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Cheap flights from London Heathrow Airport to Seattle from £271

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 21/1. 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 return flights

These are some of the best return 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 stopovers.

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 - 17:00LHR-SEA
12h 45m1 stop
14:35 - 10:50SEA-LHR
12h 15m1 stop
£419Icelandair
Find Deal
Mon, 13 Jan - Wed, 29 Jan
12:15 - 17:00LHR-SEA
12h 45m1 stop
14:35 - 19:30SEA-LHR
20h 55m1 stop
£424Icelandair
Find Deal
Wed, 15 Jan - Wed, 22 Jan
06:30 - 11:50LHR-SEA
13h 20m1 stop
19:00 - 12:40SEA-LHR
9h 40mdirect
£515KLM
Find Deal
Wed, 15 Jan - Wed, 22 Jan
15:50 - 18:25LHR-SEA
10h 35mdirect
19:00 - 12:40SEA-LHR
9h 40mdirect
£522KLM
Find Deal
Wed, 15 Jan - Wed, 22 Jan
15:50 - 18:25LHR-SEA
10h 35mdirect
17:45 - 11:10SEA-LHR
9h 25mdirect
£523Virgin Atlantic
Find Deal
Wed, 15 Jan - Wed, 22 Jan
15:00 - 16:55LHR-SEA
9h 55mdirect
07:14 - 07:20SEA-LHR
16h 06m1 stop
£525Finnair
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Wed, 22 Jan - Thu, 30 Jan
14:45 - 11:20LHR-SEA
28h 35m1 stop
17:45 - 11:10SEA-LHR
9h 25mdirect
£527Virgin Atlantic
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Mon, 13 Jan - Wed, 29 Jan
09:25 - 11:20LHR-SEA
9h 55mdirect
18:50 - 12:15SEA-LHR
9h 25mdirect
£544British Airways
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Tue, 11 Feb - Thu, 20 Feb
15:00 - 16:55LHR-SEA
9h 55mdirect
13:35 - 11:40SEA-LHR
14h 05m1 stop
£549British Airways
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Wed, 22 Jan - Tue, 4 Feb
15:00 - 16:55LHR-SEA
9h 55mdirect
18:50 - 12:15SEA-LHR
9h 25mdirect
£550Finnair
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Wed, 22 Jan - Mon, 3 Feb
14:10 - 14:21LHR-SEA
56h 11m2 stops
Tue, 21 Jan
14:10 - 14:21LHR-SEA
56h 11m2 stops
Sun, 19 Jan
17:15 - 14:21LHR-SEA
53h 06m2 stops
Wed, 22 Jan
20:30 - 14:21LHR-SEA
49h 51m2 stops
Fri, 17 Jan
12:15 - 17:00LHR-SEA
12h 45m1 stop
£356Icelandair
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Mon, 20 Jan
12:15 - 17:00LHR-SEA
12h 45m1 stop
£364Icelandair
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Wed, 19 Feb
13:15 - 15:15LHR-SEA
10h 00mdirect
£446Virgin Atlantic
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Tue, 14 Jan
19:25 - 20:04LHR-SEA
32h 39m3 stops
£481British Airways
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Tue, 14 Jan
15:00 - 16:55LHR-SEA
9h 55mdirect
£514British Airways
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Tue, 21 Jan
13:15 - 16:15LHR-SEA
10h 00mdirect
£607KLM
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Wed, 19 Mar
13:45 - 19:13LHR-SEA
37h 28m1 stop
06:05 - 06:30SEA-LHR
16h 25m1 stop
£499United Airlines
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Sat, 23 Nov - Mon, 25 Nov
13:00 - 08:36LHR-SEA
27h 36m2 stops
06:05 - 08:30SEA-LHR
18h 25m1 stop
£504United Airlines
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Sat, 23 Nov - Mon, 25 Nov
12:15 - 17:00LHR-SEA
12h 45m1 stop
14:35 - 10:50SEA-LHR
12h 15m1 stop
£610Icelandair
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Mon, 25 Nov - Thu, 9 Jan
12:15 - 17:00LHR-SEA
12h 45m1 stop
14:35 - 10:50SEA-LHR
12h 15m1 stop
£614Icelandair
Find Deal
Mon, 25 Nov - Mon, 13 Jan
12:15 - 17:00LHR-SEA
12h 45m1 stop
14:35 - 10:50SEA-LHR
12h 15m1 stop
£635Icelandair
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Mon, 25 Nov - Sat, 11 Jan
12:40 - 22:25LHR-SEA
17h 45m1 stop
17:45 - 11:10SEA-LHR
9h 25mdirect
£665Delta
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Mon, 25 Nov - Sat, 11 Jan
06:30 - 11:40LHR-SEA
13h 10m1 stop
19:30 - 13:10SEA-LHR
9h 40mdirect
£830KLM
Find Deal
Mon, 25 Nov - Fri, 10 Jan
13:05 - 15:05LHR-SEA
10h 00mdirect
11:55 - 10:35SEA-LHR
14h 40m1 stop
£845Virgin Atlantic
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Sat, 23 Nov - Mon, 25 Nov
09:25 - 11:20LHR-SEA
9h 55mdirect
18:50 - 12:15SEA-LHR
9h 25mdirect
£845British Airways
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Sat, 23 Nov - Mon, 25 Nov
15:00 - 16:55LHR-SEA
9h 55mdirect
13:35 - 07:00SEA-LHR
9h 25mdirect
£874British Airways
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Mon, 25 Nov - Tue, 7 Jan
15:50 - 18:25LHR-SEA
10h 35mdirect
19:00 - 12:40SEA-LHR
9h 40mdirect
£504Delta
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Wed, 15 Jan - Wed, 22 Jan
13:15 - 15:15LHR-SEA
10h 00mdirect
19:00 - 12:40SEA-LHR
9h 40mdirect
£505Delta
Find Deal
Mon, 9 Dec - Wed, 15 Jan
15:50 - 18:25LHR-SEA
10h 35mdirect
19:00 - 12:40SEA-LHR
9h 40mdirect
£522KLM
Find Deal
Wed, 15 Jan - Wed, 22 Jan
15:50 - 18:25LHR-SEA
10h 35mdirect
17:45 - 11:10SEA-LHR
9h 25mdirect
£523Virgin Atlantic
Find Deal
Wed, 15 Jan - Wed, 22 Jan
13:15 - 15:15LHR-SEA
10h 00mdirect
17:45 - 11:10SEA-LHR
9h 25mdirect
£528Virgin Atlantic
Find Deal
Mon, 13 Jan - Wed, 29 Jan
09:25 - 11:20LHR-SEA
9h 55mdirect
18:50 - 12:15SEA-LHR
9h 25mdirect
£544British Airways
Find Deal
Tue, 11 Feb - Mon, 24 Feb
15:00 - 16:55LHR-SEA
9h 55mdirect
18:50 - 12:15SEA-LHR
9h 25mdirect
£547British Airways
Find Deal
Wed, 22 Jan - Wed, 29 Jan
09:25 - 11:20LHR-SEA
9h 55mdirect
18:50 - 12:15SEA-LHR
9h 25mdirect
£549Finnair
Find Deal
Tue, 14 Jan - Mon, 20 Jan
15:00 - 16:55LHR-SEA
9h 55mdirect
18:50 - 12:15SEA-LHR
9h 25mdirect
£550Finnair
Find Deal
Wed, 22 Jan - Mon, 3 Feb
17:00 - 19:35LHR-SEA
10h 35mdirect
19:55 - 13:30SEA-LHR
9h 35mdirect
£555KLM
Find Deal
Sat, 19 Apr - Mon, 28 Apr

Icelandair flights from London Heathrow Airport to Seattle

Our best Icelandair deals on London Heathrow Airport to Seattle flight tickets
Icelandair
13 Jan
LHR12:15London Heathrow
12h 45m
1 stop
SEA17:00Seattle/Tacoma Intl
29 Jan
SEA14:35Seattle/Tacoma Intl
12h 15m
1 stop
LHR10:50London Heathrow
Icelandair
15 Jan
LHR12:15London Heathrow
12h 45m
1 stop
SEA17:00Seattle/Tacoma Intl
22 Jan
SEA14:35Seattle/Tacoma Intl
20h 55m
1 stop
LHR19:30London Heathrow
Icelandair
13 Jan
LHR12:15London Heathrow
12h 45m
1 stop
SEA17:00Seattle/Tacoma Intl
27 Jan
SEA14:35Seattle/Tacoma Intl
12h 15m
1 stop
LHR10:50London Heathrow

WestJet flights from London Heathrow Airport to Seattle

Our best WestJet deals on London Heathrow Airport to Seattle flight tickets
WestJet
16 Jan
LHR14:50London Heathrow
31h 31m
1 stop
SEA14:21Seattle/Tacoma Intl
19 Jan
SEA15:15Seattle/Tacoma Intl
13h 35m
1 stop
LHR12:50London Heathrow
WestJet
23 Jan
LHR14:50London Heathrow
31h 31m
1 stop
SEA14:21Seattle/Tacoma Intl
30 Jan
SEA15:15Seattle/Tacoma Intl
13h 35m
1 stop
LHR12:50London Heathrow
WestJet
17 Jan
LHR14:50London Heathrow
27h 10m
2 stops
SEA10:00Seattle/Tacoma Intl
19 Jan
SEA15:15Seattle/Tacoma Intl
13h 35m
1 stop
LHR12:50London 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 from London Heathrow Airport to Seattle?

January. The cheapest time of year to fly to Seattle from London Heathrow Airport is January. The most expensive is July.

What is the cheapest day to depart London Heathrow Airport for Seattle?

Wednesday. The cheapest day of the week is usually Wednesday. The most expensive is usually Sunday.

When is the cheapest time to fly from London Heathrow Airport to Seattle?

In the evening. London Heathrow Airport to Seattle flights are approximately 12% more expensive in the afternoon than in the evening

How far in advance should you book London Heathrow Airport to Seattle flights?

48 days before. The cheapest time to buy a flight from London Heathrow Airport to Seattle is approximately 48 days to departure

What cabin class options are available on London Heathrow Airport to Seattle flights?

There are 3 cabin classes available to choose from on London Heathrow Airport to Seattle 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 39% 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 November 2024, prices for London Heathrow Airport to Seattle flights are approximately 12% 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 return 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

£271

Fastest flight time

9h 55m

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 £271. The best return flight deal from London Heathrow Airport to Seattle found on momondo in the last 72 hours is £419.
The fastest flight from London Heathrow Airport to Seattle takes 9h 55m
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?

    The distance between London Heathrow and Seattle/Tacoma Intl is about 4774.1 mi. A reasonable flight in good conditions will take 9h 55m.

  • 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 were last updated today.

  • How many operators does momondo search for flights from London Heathrow Airport to Seattle/Tacoma Intl Airport?

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for 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 travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

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


Best airlines flying from London Heathrow Airport to Seattle

Compare and see reviews for airlines that fly from London Heathrow Airport to Seattle with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom £319Free CancellationRating
8.0
8,756 reviews
Search Delta flights
LufthansaPriceFrom £406Free CancellationRating
6.8
7,148 reviews
Search Lufthansa flights
IcelandairPriceFrom £410Free CancellationRating
7.2
555 reviews
Search Icelandair flights
United AirlinesPriceFrom £419Free CancellationRating
7.4
9,171 reviews
Search United Airlines flights
Aer LingusPriceFrom £437Free CancellationRating
7.1
1,089 reviews
Search Aer Lingus flights
British AirwaysPriceFrom £440Free CancellationRating
6.6
6,837 reviews
Search British Airways flights
Air CanadaPriceFrom £441Free CancellationRating
7.0
8,237 reviews
Search Air Canada flights
Virgin AtlanticPriceFrom £447Free CancellationRating
7.5
663 reviews
Search Virgin Atlantic flights
FinnairPriceFrom £449Free CancellationRating
7.7
1,300 reviews
Search Finnair flights
Air FrancePriceFrom £476Free CancellationRating
7.4
1,523 reviews
Search Air France flights
  • Delta Flights From London Heathrow Airport to Seattle

    Delta operates around 6 flights from London Heathrow Airport to Seattle every week. The average price of these flights found in the last 72 hours has been £807, but momondo users have found Delta deals from London Heathrow Airport to Seattle from as low as £404 round-trip. Delta has been scored 8.0/10 in 8,756 reviews.

  • KLM Flights From London Heathrow Airport to Seattle

    KLM (7.8/10 from 1,350 reviews) operates around 6 flights from London Heathrow Airport to Seattle in any given week. The average KLM airfare for this route is around £815, with deals from around £615 rare but found on momondo. Referenced prices are for round-trip London Heathrow Airport to Seattle flight searches in the last 72 hours.


Why use momondo?

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

Finding the right flight to Seattle from London is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Seattle quick and easy, saving you time and money.

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

Flights from London to Seattle with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once all potential London to Seattle flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of London to Seattle 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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