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Cheap flights from Seattle to London Heathrow Airport from $208

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 Heathrow Airport departing on 1/21. 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

Cheap round-trip flights

These are some of the best round-trip flight deals from Seattle to London 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 Seattle to London.

Cheap last minute flights

Planning a quick getaway from Seattle to London? 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 London, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from Seattle to London

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

All round-trip flight deals to London

The cheapest plane tickets to London found on KAYAK recently.
2:35 pm - 10:50 amSEA-LHR
12h 15m1 stop
8:40 pm - 5:00 pmLHR-SEA
28h 20m1 stop
$537Icelandair
Find Deal
Tue, Jan 14 - Sun, Jan 19
2:35 pm - 10:50 amSEA-LHR
12h 15m1 stop
12:15 pm - 5:00 pmLHR-SEA
12h 45m1 stop
$551Icelandair
Find Deal
Fri, Jan 10 - Mon, Jan 20
5:45 pm - 11:10 amSEA-LHR
9h 25mnonstop
6:20 am - 11:20 amLHR-SEA
13h 00m1 stop
$628Virgin Atlantic
Find Deal
Sun, Dec 29 - Tue, Jan 14
1:35 pm - 7:00 amSEA-LHR
9h 25mnonstop
3:00 pm - 4:55 pmLHR-SEA
9h 55mnonstop
$643British Airways
Find Deal
Tue, Jan 21 - Thu, Jan 30
6:55 pm - 12:40 pmSEA-LHR
9h 45mnonstop
6:30 am - 11:50 amLHR-SEA
13h 20m1 stop
$647Delta
Find Deal
Sun, Dec 29 - Thu, Jan 23
5:45 pm - 11:10 amSEA-LHR
9h 25mnonstop
6:20 am - 11:20 amLHR-SEA
13h 00m1 stop
$652Delta
Find Deal
Mon, Dec 30 - Thu, Feb 6
6:50 pm - 12:15 pmSEA-LHR
9h 25mnonstop
8:20 am - 7:02 pmLHR-SEA
17h 42m1 stop
$653British Airways
Find Deal
Mon, Mar 3 - Tue, Mar 18
7:50 pm - 12:15 pmSEA-LHR
9h 25mnonstop
9:50 am - 11:35 amLHR-SEA
9h 45mnonstop
$671Iberia
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Sun, Mar 16 - Fri, Apr 4
6:50 pm - 12:15 pmSEA-LHR
9h 25mnonstop
1:50 pm - 11:07 pmLHR-SEA
16h 17m1 stop
$681Iberia
Find Deal
Wed, Jan 8 - Wed, Mar 12
3:50 pm - 9:10 amSEA-LHR
9h 20mnonstop
6:30 am - 4:05 pmLHR-SEA
17h 35m1 stop
$715Virgin Atlantic
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Fri, Apr 18 - Fri, Apr 25
3:15 pm - 12:50 pmSEA-LHR
13h 35m1 stop
$208WestJet
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Tue, Jan 21
2:35 pm - 10:50 amSEA-LHR
12h 15m1 stop
$214Icelandair
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Mon, Jan 20
5:45 pm - 11:10 amSEA-LHR
9h 25mnonstop
$395Virgin Atlantic
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Wed, Jan 29
5:45 pm - 11:10 amSEA-LHR
9h 25mnonstop
$399Virgin Atlantic
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Tue, Jan 21
6:50 pm - 12:15 pmSEA-LHR
9h 25mnonstop
$405Iberia
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Mon, Jan 20
1:35 pm - 7:00 amSEA-LHR
9h 25mnonstop
$417British Airways
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Tue, Feb 4
12:40 am - 12:15 pmSEA-LHR
27h 35m1 stop
$426Delta
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Sat, Apr 26
12:40 am - 7:05 amSEA-LHR
23h 25m1 stop
$453Delta
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Tue, Mar 18
1:45 pm - 7:10 amSEA-LHR
9h 25mnonstop
$455Iberia
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Sat, Jan 11
7:40 pm - 1:00 pmSEA-LHR
9h 20mnonstop
$528British Airways
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Wed, May 7
2:35 pm - 7:30 pmSEA-LHR
20h 55m1 stop
8:40 pm - 5:00 pmLHR-SEA
28h 20m1 stop
$760Icelandair
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Tue, Nov 26 - Tue, Dec 3
7:11 pm - 9:40 amSEA-LHR
30h 29m1 stop
1:00 pm - 9:50 amLHR-SEA
28h 50m1 stop
$805United Airlines
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Sat, Nov 23 - Fri, Dec 13
10:55 pm - 6:50 amSEA-LHR
23h 55m1 stop
12:40 pm - 2:40 pmLHR-SEA
10h 00mnonstop
$826Delta
Find Deal
Sat, Nov 23 - Fri, Dec 13
1:35 pm - 7:00 amSEA-LHR
9h 25mnonstop
3:00 pm - 4:55 pmLHR-SEA
9h 55mnonstop
$972Iberia
Find Deal
Tue, Nov 26 - Tue, Dec 3
1:35 pm - 10:00 amSEA-LHR
12h 25m1 stop
1:15 pm - 3:15 pmLHR-SEA
10h 00mnonstop
$977Delta
Find Deal
Tue, Nov 26 - Tue, Dec 3
2:00 pm - 6:20 amSEA-LHR
32h 20m1 stop
3:00 pm - 4:55 pmLHR-SEA
9h 55mnonstop
$1,179British Airways
Find Deal
Sat, Nov 23 - Wed, Dec 18
1:35 pm - 6:50 amSEA-LHR
33h 15m1 stop
9:25 am - 11:20 amLHR-SEA
9h 55mnonstop
$1,714British Airways
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Fri, Nov 22 - Sat, Nov 30
6:50 pm - 12:15 pmSEA-LHR
9h 25mnonstop
3:00 pm - 4:55 pmLHR-SEA
9h 55mnonstop
$2,078Iberia
Find Deal
Sun, Nov 24 - Fri, Nov 29
7:25 pm - 1:10 pmSEA-LHR
9h 45mnonstop
1:15 pm - 3:15 pmLHR-SEA
10h 00mnonstop
$2,646Virgin Atlantic
Find Deal
Fri, Nov 22 - Tue, Nov 26
7:25 pm - 1:10 pmSEA-LHR
9h 45mnonstop
1:15 pm - 3:15 pmLHR-SEA
10h 00mnonstop
$2,696Virgin Atlantic
Find Deal
Fri, Nov 22 - Mon, Nov 25
5:45 pm - 11:10 amSEA-LHR
9h 25mnonstop
1:15 pm - 3:15 pmLHR-SEA
10h 00mnonstop
$638Virgin Atlantic
Find Deal
Sun, Dec 29 - Tue, Jan 14
5:45 pm - 11:10 amSEA-LHR
9h 25mnonstop
1:15 pm - 3:15 pmLHR-SEA
10h 00mnonstop
$642Virgin Atlantic
Find Deal
Sun, Dec 29 - Tue, Jan 14
6:50 pm - 12:15 pmSEA-LHR
9h 25mnonstop
3:00 pm - 4:55 pmLHR-SEA
9h 55mnonstop
$643British Airways
Find Deal
Tue, Jan 28 - Fri, Feb 7
1:30 pm - 6:50 amSEA-LHR
9h 20mnonstop
9:45 am - 11:30 amLHR-SEA
9h 45mnonstop
$645Iberia
Find Deal
Tue, Apr 15 - Thu, Apr 24
1:30 pm - 6:50 amSEA-LHR
9h 20mnonstop
9:50 am - 11:35 amLHR-SEA
9h 45mnonstop
$646British Airways
Find Deal
Tue, Apr 1 - Tue, Apr 15
5:45 pm - 11:10 amSEA-LHR
9h 25mnonstop
12:40 pm - 2:40 pmLHR-SEA
10h 00mnonstop
$661Delta
Find Deal
Sun, Dec 29 - Thu, Feb 6
6:50 pm - 12:15 pmSEA-LHR
9h 25mnonstop
3:00 pm - 4:55 pmLHR-SEA
9h 55mnonstop
$669Iberia
Find Deal
Mon, Jan 13 - Tue, Jan 28
5:45 pm - 11:10 amSEA-LHR
9h 25mnonstop
1:05 pm - 3:05 pmLHR-SEA
10h 00mnonstop
$711Delta
Find Deal
Sun, Dec 29 - Sat, Jan 18
7:30 pm - 1:10 pmSEA-LHR
9h 40mnonstop
3:50 pm - 6:25 pmLHR-SEA
10h 35mnonstop
$836Air France
Find Deal
Fri, Dec 27 - Wed, Jan 22
6:55 pm - 12:40 pmSEA-LHR
9h 45mnonstop
3:50 pm - 6:25 pmLHR-SEA
10h 35mnonstop
$876Air France
Find Deal
Wed, Dec 25 - Wed, Jan 22

Icelandair flights from Seattle to London Heathrow Airport

Our best Icelandair deals on Seattle to London Heathrow Airport flight tickets
Icelandair
Jan 14
SEA2:35 pmSeattle/Tacoma Intl
12h 15m
1 stop
LHR10:50 amLondon Heathrow
Jan 19
LHR8:40 pmLondon Heathrow
28h 20m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
Icelandair
Jan 10
SEA2:35 pmSeattle/Tacoma Intl
12h 15m
1 stop
LHR10:50 amLondon Heathrow
Jan 20
LHR12:15 pmLondon Heathrow
12h 45m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
Icelandair
Apr 1
SEA3:50 pmSeattle/Tacoma Intl
12h 05m
1 stop
LHR11:55 amLondon Heathrow
May 6
LHR1:05 pmLondon Heathrow
12h 35m
1 stop
SEA5:40 pmSeattle/Tacoma Intl

Air Canada flights from Seattle to London Heathrow Airport

Our best Air Canada deals on Seattle to London Heathrow Airport flight tickets
Air Canada
Dec 29
SEA10:35 amSeattle/Tacoma Intl
15h 35m
1 stop
LHR10:10 amLondon Heathrow
Jan 14
LHR6:00 pmLondon Heathrow
28h 30m
2 stops
SEA2:30 pmSeattle/Tacoma Intl
Air Canada
Jan 16
SEA10:35 amSeattle/Tacoma Intl
14h 45m
2 stops
LHR9:20 amLondon Heathrow
Jan 23
LHR1:00 pmLondon Heathrow
13h 30m
1 stop
SEA6:30 pmSeattle/Tacoma Intl
Air Canada
Nov 30
SEA7:15 pmSeattle/Tacoma Intl
30h 55m
1 stop
LHR10:10 amLondon Heathrow
Dec 15
LHR1:00 pmLondon Heathrow
13h 25m
1 stop
SEA6:25 pmSeattle/Tacoma Intl

See travel insights to London from

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

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 London Heathrow Airport?

The month of November is, on average, the cheapest month to fly to London Heathrow Airport from Seattle, with most prices found around $689. If you’re not able to fly to London Heathrow Airport in November, then October is your next best option. Flight prices from Seattle to London Heathrow Airport during October average around $701.

What is the cheapest day to depart on your flight to London Heathrow Airport?

Our data shows that Sunday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $797. The most expensive day to fly to London Heathrow Airport is Thursday, with ticket prices averaging around $899.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the afternoon. momondo users have found flights departing from Seattle to London Heathrow Airport in the afternoon for as low as $815. 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 morning are often more expensive with an average ticket price of $929.

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

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

How far in advance should I book a flight to London Heathrow Airport?

We recommend purchasing flights from Seattle to London Heathrow Airport 44 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 London Heathrow Airport for $824. Don’t hesitate to check prices now though because momondo users recently found tickets for as low as $683.

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

There are 4 cabin classes available to choose from on Seattle/Tacoma Intl to London Heathrow 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 Seattle to London Heathrow Airport flights?

You could potentially save up to 47% on your flight if you consider stops on a Seattle to London Heathrow Airport flight.

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

As of November 2024, prices for Seattle to London Heathrow Airport flights are approximately 42% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to London Heathrow Airport

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

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

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

Best Price Found

$208

Fastest flight time

9h 20m

Direct flights

Every day
The best one-way flight to London Heathrow Airport from Seattle in the past 72 hours is $208. The best round-trip flight deal from Seattle to London Heathrow Airport found on momondo in the last 72 hours is $537.
The fastest flight from Seattle to London Heathrow Airport takes 9h 20m
Direct flights go from Seattle to London Heathrow Airport every day.

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

    The straight-line distance from Seattle/Tacoma Intl to London Heathrow is 4774.1 mi. 9h 20m is a normal flight duration for this route.

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

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

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

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

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

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

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

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


Best airlines flying from Seattle to London Heathrow Airport

Compare and see reviews for airlines that fly from Seattle to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
LufthansaPriceFrom $384Free CancellationRating
6.8
7,143 reviews
Search Lufthansa flights
IcelandairPriceFrom $499Free CancellationRating
7.2
553 reviews
Search Icelandair flights
FinnairPriceFrom $560Free CancellationRating
7.7
1,300 reviews
Search Finnair flights
Aer LingusPriceFrom $579Free CancellationRating
7.1
1,089 reviews
Search Aer Lingus flights
IberiaPriceFrom $583Free CancellationRating
7.0
2,661 reviews
Search Iberia flights
Air FrancePriceFrom $588Free CancellationRating
7.4
1,525 reviews
Search Air France flights
KLMPriceFrom $598Free CancellationRating
7.8
1,349 reviews
Search KLM flights
American AirlinesPriceFrom $607Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $610Free CancellationRating
8.0
8,755 reviews
Search Delta flights
Air CanadaPriceFrom $610Free CancellationRating
7.0
8,246 reviews
Search Air Canada flights
  • Delta Flights From Seattle to London Heathrow Airport

    Delta is one of the most popular airlines flying from Seattle to London Heathrow Airport, operating 9 flights/week on average for this route. A good Delta flight deal for Seattle to London Heathrow Airport starts from $610 round-trip, up to an average price of $886. Our users have rated Delta at 8.0/10.

  • Alaska Airlines Flights From Seattle to London Heathrow Airport

    Another popular option for Seattle to London Heathrow Airport flights is Alaska Airlines (8.0/10, 9,464 ratings). Alaska Airlines flies from Seattle to London Heathrow Airport around 5 times per week, with deals starting from $800 round-trip and rising to an average price of around $1,194.


Why use momondo?

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

Finding the right flight to London from Seattle 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 London quick and easy, saving you time and money.

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

Flights from Seattle to London 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 Seattle to London?

Once you have performed a search for Seattle to London flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Price alerts on flights to London from Seattle are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.


An easier way to manage your London Heathrow Airport trip

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