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Cheap flights from Seattle to London from C$ 312

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 28/1. 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 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 p.m. - 10:55 a.m.SEA-LGW
12h 20m1 stop
11:55 a.m. - 5:00 p.m.LGW-SEA
13h 05m1 stop
C$ 819Icelandair
Find Deal
Fri, 17 Jan - Sat, 25 Jan
2:35 p.m. - 10:55 a.m.SEA-LGW
12h 20m1 stop
11:55 a.m. - 5:00 p.m.LGW-SEA
13h 05m1 stop
C$ 824Icelandair
Find Deal
Tue, 26 Nov - Thu, 5 Dec
5:05 p.m. - 10:30 a.m.SEA-LHR
9h 25mdirect
6:30 a.m. - 11:52 a.m.LHR-SEA
13h 22m1 stop
C$ 902Delta
Find Deal
Tue, 3 Dec - Wed, 11 Dec
6:20 p.m. - 4:40 p.m.SEA-LHR
14h 20m1 stop
6:30 a.m. - 11:52 a.m.LHR-SEA
13h 22m1 stop
C$ 907Delta
Find Deal
Wed, 11 Dec - Wed, 25 Dec
5:05 p.m. - 10:30 a.m.SEA-LHR
9h 25mdirect
6:20 a.m. - 11:20 a.m.LHR-SEA
13h 00m1 stop
C$ 909Virgin Atlantic
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Mon, 2 Dec - Tue, 10 Dec
7:00 p.m. - 12:40 p.m.SEA-LHR
9h 40mdirect
6:30 a.m. - 11:50 a.m.LHR-SEA
13h 20m1 stop
C$ 915KLM
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Wed, 8 Jan - Tue, 21 Jan
8:50 a.m. - 7:05 a.m.SEA-LHR
14h 15m1 stop
3:50 p.m. - 6:30 p.m.LHR-SEA
10h 40mdirect
C$ 922Virgin Atlantic
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Mon, 9 Dec - Wed, 25 Dec
6:55 p.m. - 12:40 p.m.SEA-LHR
9h 45mdirect
3:50 p.m. - 7:10 p.m.LHR-SEA
10h 20mdirect
C$ 932KLM
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Wed, 5 Mar - Wed, 12 Mar
6:50 p.m. - 12:15 p.m.SEA-LHR
9h 25mdirect
3:00 p.m. - 5:55 p.m.LHR-SEA
9h 55mdirect
C$ 1,002British Airways
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Mon, 3 Mar - Mon, 10 Mar
7:40 p.m. - 1:00 p.m.SEA-LHR
9h 20mdirect
9:50 a.m. - 11:35 a.m.LHR-SEA
9h 45mdirect
C$ 1,006British Airways
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Fri, 18 Apr - Fri, 25 Apr
3:15 p.m. - 12:50 p.m.SEA-LHR
13h 35m1 stop
C$ 312WestJet
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Tue, 28 Jan
2:35 p.m. - 10:55 a.m.SEA-LGW
12h 20m1 stop
C$ 313Icelandair
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Sun, 8 Dec
6:50 p.m. - 12:15 p.m.SEA-LHR
9h 25mdirect
C$ 566British Airways
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Sun, 8 Dec
12:55 a.m. - 7:05 a.m.SEA-LHR
22h 10m1 stop
C$ 573Delta
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Sat, 30 Nov
5:05 p.m. - 10:30 a.m.SEA-LHR
9h 25mdirect
C$ 637Delta
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Fri, 29 Nov
1:35 p.m. - 10:00 a.m.SEA-LHR
12h 25m1 stop
C$ 643KLM
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Fri, 29 Nov
7:00 p.m. - 12:40 p.m.SEA-LHR
9h 40mdirect
C$ 676Virgin Atlantic
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Wed, 6 Nov
8:55 a.m. - 7:05 a.m.SEA-LHR
14h 10m1 stop
C$ 682KLM
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Tue, 5 Nov
5:45 p.m. - 11:10 a.m.SEA-LHR
9h 25mdirect
C$ 746Virgin Atlantic
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Thu, 7 Nov
1:45 p.m. - 7:10 a.m.SEA-LHR
9h 25mdirect
C$ 829British Airways
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Fri, 27 Dec
10:35 a.m. - 10:10 a.m.SEA-LHR
15h 35m1 stop
6:30 a.m. - 12:10 p.m.LHR-SEA
13h 40m1 stop
C$ 1,113Lufthansa
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Tue, 5 Nov - Wed, 20 Nov
10:35 a.m. - 10:10 a.m.SEA-LHR
15h 35m1 stop
7:40 a.m. - 1:20 p.m.LHR-SEA
13h 40m1 stop
C$ 1,114United Airlines
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Tue, 5 Nov - Tue, 12 Nov
5:45 p.m. - 11:10 a.m.SEA-LHR
9h 25mdirect
6:30 a.m. - 11:40 a.m.LHR-SEA
13h 10m1 stop
C$ 1,117Delta
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Tue, 5 Nov - Tue, 19 Nov
7:00 p.m. - 9:30 p.m.SEA-LGW
18h 30m1 stop
10:15 a.m. - 5:05 p.m.LGW-SEA
38h 50m1 stop
C$ 1,120Turkish Airlines
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Tue, 5 Nov - Tue, 19 Nov
5:45 p.m. - 11:10 a.m.SEA-LHR
9h 25mdirect
6:20 a.m. - 12:00 p.m.LHR-SEA
13h 40m1 stop
C$ 1,124Delta
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Tue, 5 Nov - Fri, 15 Nov
1:35 p.m. - 7:00 a.m.SEA-LHR
9h 25mdirect
9:25 a.m. - 11:20 a.m.LHR-SEA
9h 55mdirect
C$ 1,135British Airways
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Tue, 5 Nov - Fri, 15 Nov
1:35 p.m. - 7:00 a.m.SEA-LHR
9h 25mdirect
12:10 p.m. - 6:15 p.m.LHR-SEA
14h 05m1 stop
C$ 1,369British Airways
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Tue, 5 Nov - Wed, 20 Nov
6:06 a.m. - 7:30 p.m.SEA-LHR
29h 24m2 stops
12:15 p.m. - 5:00 p.m.LHR-SEA
12h 45m1 stop
C$ 1,560Icelandair
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Mon, 4 Nov - Thu, 14 Nov
3:35 p.m. - 10:55 a.m.SEA-LGW
12h 20m1 stop
11:55 a.m. - 5:00 p.m.LGW-SEA
13h 05m1 stop
C$ 2,086Icelandair
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Sat, 2 Nov - Fri, 15 Nov
6:45 p.m. - 11:10 a.m.SEA-LHR
9h 25mdirect
1:15 p.m. - 3:15 p.m.LHR-SEA
10h 00mdirect
C$ 2,780Virgin Atlantic
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Sat, 2 Nov - Wed, 13 Nov
6:50 p.m. - 12:15 p.m.SEA-LHR
9h 25mdirect
9:25 a.m. - 11:20 a.m.LHR-SEA
9h 55mdirect
C$ 895Iberia
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Tue, 11 Feb - Tue, 18 Feb
5:05 p.m. - 10:30 a.m.SEA-LHR
9h 25mdirect
3:50 p.m. - 6:30 p.m.LHR-SEA
10h 40mdirect
C$ 918Delta
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Tue, 3 Dec - Wed, 18 Dec
5:05 p.m. - 10:30 a.m.SEA-LHR
9h 25mdirect
3:50 p.m. - 6:30 p.m.LHR-SEA
10h 40mdirect
C$ 920Virgin Atlantic
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Mon, 2 Dec - Wed, 18 Dec
7:40 p.m. - 1:00 p.m.SEA-LHR
9h 20mdirect
9:45 a.m. - 11:30 a.m.LHR-SEA
9h 45mdirect
C$ 922Finnair
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Mon, 7 Apr - Thu, 15 May
6:55 p.m. - 12:40 p.m.SEA-LHR
9h 45mdirect
3:50 p.m. - 7:10 p.m.LHR-SEA
10h 20mdirect
C$ 932KLM
Find Deal
Wed, 5 Mar - Wed, 12 Mar
6:50 p.m. - 12:15 p.m.SEA-LHR
9h 25mdirect
9:25 a.m. - 11:20 a.m.LHR-SEA
9h 55mdirect
C$ 934British Airways
Find Deal
Tue, 7 Jan - Tue, 21 Jan
7:55 p.m. - 12:40 p.m.SEA-LHR
9h 45mdirect
5:00 p.m. - 7:35 p.m.LHR-SEA
10h 35mdirect
C$ 936KLM
Find Deal
Wed, 19 Mar - Wed, 2 Apr
5:05 p.m. - 10:30 a.m.SEA-LHR
9h 25mdirect
1:15 p.m. - 3:15 p.m.LHR-SEA
10h 00mdirect
C$ 989Virgin Atlantic
Find Deal
Mon, 9 Dec - Mon, 16 Dec
6:50 p.m. - 12:15 p.m.SEA-LHR
9h 25mdirect
3:00 p.m. - 5:55 p.m.LHR-SEA
9h 55mdirect
C$ 1,002British Airways
Find Deal
Mon, 3 Mar - Mon, 10 Mar
6:50 p.m. - 12:15 p.m.SEA-LHR
9h 25mdirect
9:25 a.m. - 11:20 a.m.LHR-SEA
9h 55mdirect
C$ 1,135Finnair
Find Deal
Mon, 11 Nov - Tue, 26 Nov

Finnair flights from Seattle to London

Our best Finnair deals on Seattle to London flight tickets
Finnair
7 Apr
SEA7:40 p.m.Seattle/Tacoma Intl
9h 20m
LHR1:00 p.m.London Heathrow
15 May
LHR9:30 a.m.London Heathrow
14h 30m
1 stop
SEA4:00 p.m.Seattle/Tacoma Intl
Finnair
29 Apr
SEA1:32 p.m.Seattle/Tacoma Intl
12h 48m
1 stop
LHR10:20 a.m.London Heathrow
7 May
LHR10:20 a.m.London Heathrow
13h 40m
1 stop
SEA4:00 p.m.Seattle/Tacoma Intl
Finnair
27 Apr
SEA7:40 p.m.Seattle/Tacoma Intl
9h 20m
LHR1:00 p.m.London Heathrow
11 May
LHR10:20 a.m.London Heathrow
13h 40m
1 stop
SEA4:00 p.m.Seattle/Tacoma Intl

Iberia flights from Seattle to London

Our best Iberia deals on Seattle to London flight tickets
Iberia
11 Feb
SEA6:50 p.m.Seattle/Tacoma Intl
9h 25m
LHR12:15 p.m.London Heathrow
18 Feb
LHR9:25 a.m.London Heathrow
9h 55m
SEA11:20 a.m.Seattle/Tacoma Intl
Iberia
14 Feb
SEA6:50 p.m.Seattle/Tacoma Intl
9h 25m
LHR12:15 p.m.London Heathrow
24 Feb
LHR3:00 p.m.London Heathrow
9h 55m
SEA4:55 p.m.Seattle/Tacoma Intl
C$ 1,028
Find similar

How to get the cheapest flight ticket from Seattle to London

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 typical price of a round-trip flight between Seattle and London?

What is the cheapest month to fly from Seattle to London?

January. The cheapest time of year to fly to London from Seattle is January. The most expensive is June.

What is the cheapest day to depart Seattle for London?

Wednesday. The cheapest day of the week is typically Wednesday. The most expensive is typically Friday

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

In the morning. Seattle to London flights are approximately 17% more expensive at noon than in the morning

What is the cheapest airline that flies to London from Seattle?

KLM. KLM, Iberia, and Delta are the most popular carriers operating from Seattle to London

What is the cheapest Seattle to London flight route?

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

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

7 days before. The cheapest time to buy a flight from Seattle to London is approximately 7 days to departure

How many flights depart from Seattle to London on average per day?

6 flights are operational weekly from Seattle to London as of October 2024. The most popular departure time for this route is 7:00p.m., with 89% of flights per day taking off in the evening.

How many flights depart from Seattle to London on average per week?

As of October 2024, there are 42 flights per week flying from Seattle to London. The most common day of the week flights depart is Wednesday, with 29% of flights taking off on this day.

Can stopping save me money on Seattle to London flights?

You could potentially save up to 44% on your flight if you consider stops on a Seattle to London flight.

How have Seattle to London flight prices changed over time?

As of October 2024, prices for Seattle to London flights are approximately 35% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to London

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

Cheap Seattle to London (SEA to LON) flight deals and tips

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

Best price found

C$ 312

Fastest flight time

9h 20m

Direct flights

Every day

Airports in London

2 airports
The best one-way flight to London from Seattle in the past 72 hours is C$ 312. The best round-trip flight deal from Seattle to London found on momondo in the last 72 hours is C$ 819.
The fastest flight from Seattle to London takes 9h 20m
Direct flights go from Seattle to London every day.
There are 2 airports near London: London Heathrow (LHR), London Gatwick (LGW)

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

    The straight-line distance from Seattle/Tacoma Intl to London is 7694.7 km. 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?

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

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to London.

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

    The travel and health documents you'll need for your trip to London 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. 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?

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


Best airlines flying from Seattle to London

Compare and see reviews for airlines that fly from Seattle to London with momondo
Airline
Rating
Free Cancellation
Price
IberiaPriceFrom C$ 613Free CancellationRating
7.0
2,670 reviews
Search Iberia flights
IcelandairPriceFrom C$ 614Free CancellationRating
7.2
585 reviews
Search Icelandair flights
Air FrancePriceFrom C$ 715Free CancellationRating
7.4
1,531 reviews
Search Air France flights
KLMPriceFrom C$ 715Free CancellationRating
7.8
1,352 reviews
Search KLM flights
DeltaPriceFrom C$ 850Free CancellationRating
8.0
8,835 reviews
Search Delta flights
Virgin AtlanticPriceFrom C$ 854Free CancellationRating
7.6
666 reviews
Search Virgin Atlantic flights
British AirwaysPriceFrom C$ 860Free CancellationRating
6.7
6,843 reviews
Search British Airways flights
  • Delta Flights From Seattle to London

    The lowest priced Delta flight from Seattle to London from the last 72 hours was C$ 611. Generally, Delta has 4 flights on this route every week with an average price of C$ 704. Delta is rated 8.0/10 by our users.

  • KLM Flights From Seattle to London

    C$ 514 is the best KLM flight deal from Seattle to London found on momondo over the last 72 hours. The average KLM ticket price found was closer to C$ 650, however, with flight time and availability significantly affecting the price. KLM (7.8/10 from 1,352 user reviews) flies into London from Seattle 4 times in an average week so prices can vary.


Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Seattle to London. momondo saves you time and could save you money on your trip.

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?

momondo helps you find the best flight between Seattle and London by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes. momondo can track prices for Seattle to London flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.


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Fly into one of these airports located in London

Airports listed have a maximum distance of 57.3 km from London