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Cheap flights from London to Seattle from £207

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 to Seattle departing on 21/5. 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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Easily compare return flights from London to Seattle

Below you can see the best fares for your return flight route over the next six months. All fares were found on momondo this week. Browse the quickest and cheapest flights from London to Seattle by changing tabs
Icelandair
30 Sept
LHR21:25London Heathrow
28h 30m
1 stop
SEA17:55Seattle/Tacoma Intl
7 Oct
SEA15:50Seattle/Tacoma Intl
20h 30m
1 stop
LHR20:20London Heathrow
Multiple Airlines
2 May
LGW21:20London Gatwick
45h 14m
2 stops
SEA10:34Seattle/Tacoma Intl
6 May
SEA23:38Seattle/Tacoma Intl
22h 42m
1 stop
LGW06:20London Gatwick
Virgin Atlantic
30 Apr
LHR15:55London Heathrow
10h 20m
SEA18:15Seattle/Tacoma Intl
14 May
SEA08:35Seattle/Tacoma Intl
14h 40m
1 stop
LHR07:15London Heathrow
United Airlines
4 May
LHR08:00London Heathrow
15h 28m
1 stop
SEA15:28Seattle/Tacoma Intl
4 May
SEA19:43Seattle/Tacoma Intl
30h 42m
1 stop
LHR10:25London Heathrow
Delta
29 Apr
LHR11:45London Heathrow
30h 30m
1 stop
SEA10:15Seattle/Tacoma Intl
13 May
SEA16:30Seattle/Tacoma Intl
9h 20m
LHR09:50London Heathrow
Air Canada
29 Apr
LHR08:30London Heathrow
20h 23m
1 stop
SEA20:53Seattle/Tacoma Intl
6 May
SEA07:40Seattle/Tacoma Intl
14h 50m
1 stop
LHR06:30London Heathrow

Find the cheapest one-way flights from London to Seattle

If you're looking for one-way flights from London to Seattle, view some of our deals below provided by Icelandair, Virgin Atlantic and WestJet
Multiple Airlines
21 May
LGW10:45London Gatwick
30h 00m
2 stops
SEA08:45Seattle/Tacoma Intl
Icelandair
8 Jun
LHR21:25London Heathrow
21h 55m
1 stop
SEA11:20Seattle/Tacoma Intl
WestJet
6 May
LHR13:55London Heathrow
31h 01m
1 stop
SEA12:56Seattle/Tacoma Intl

Search last-minute flights to Seattle from London

Find and compare return flight prices for your last-minute flight from London to Seattle
United Airlines
22 Apr
LHR14:05London Heathrow
29h 38m
2 stops
SEA11:43Seattle/Tacoma Intl
29 Apr
SEA16:43Seattle/Tacoma Intl
13h 27m
1 stop
LHR14:10London Heathrow
Virgin Atlantic
25 Apr
LHR06:15London Heathrow
13h 05m
1 stop
SEA11:20Seattle/Tacoma Intl
28 Apr
SEA23:05Seattle/Tacoma Intl
13h 05m
1 stop
LHR20:10London Heathrow
Air Canada
22 Apr
LHR18:00London Heathrow
34h 53m
1 stop
SEA20:53Seattle/Tacoma Intl
29 Apr
SEA09:35Seattle/Tacoma Intl
18h 15m
1 stop
LHR11:50London Heathrow
American Airlines
22 Apr
LHR09:15London Heathrow
17h 49m
1 stop
SEA19:04Seattle/Tacoma Intl
28 Apr
SEA00:59Seattle/Tacoma Intl
23h 01m
1 stop
LHR08:00London Heathrow
Icelandair
25 Apr
LHR21:25London Heathrow
28h 15m
1 stop
SEA17:40Seattle/Tacoma Intl
15 May
SEA18:55Seattle/Tacoma Intl
17h 25m
1 stop
LHR20:20London Heathrow
Delta
25 Apr
LHR09:55London Heathrow
14h 45m
1 stop
SEA16:40Seattle/Tacoma Intl
27 Apr
SEA00:35Seattle/Tacoma Intl
22h 40m
1 stop
LHR07:15London Heathrow

Best airlines flying from London to Seattle

Compare and see reviews for airlines that fly from London to Seattle with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom £272Free CancellationRating
8.0
11,136 reviews
Search Delta flights
British AirwaysPriceFrom £342Free CancellationRating
6.8
6,936 reviews
Search British Airways flights
Virgin AtlanticPriceFrom £393Free CancellationRating
7.7
749 reviews
Search Virgin Atlantic flights
IcelandairPriceFrom £398Free CancellationRating
7.1
1,367 reviews
Search Icelandair flights
Air CanadaPriceFrom £435Free CancellationRating
7.0
6,832 reviews
Search Air Canada flights
American AirlinesPriceFrom £442Free CancellationRating
7.3
14,973 reviews
Search American Airlines flights
LufthansaPriceFrom £446Free CancellationRating
7.0
7,790 reviews
Search Lufthansa flights
KLMPriceFrom £450Free CancellationRating
7.8
1,643 reviews
Search KLM flights
United AirlinesPriceFrom £451Free CancellationRating
7.4
11,346 reviews
Search United Airlines flights
FinnairPriceFrom £454Free CancellationRating
7.7
1,388 reviews
Search Finnair flights
  • Delta Flights From London to Seattle

    Delta flight deals from London to Seattle start from £338 round-trip. Over the 14 Delta flights for this route in a normal week, average airfare is usually £746 round-trip - but some users have found much cheaper deals with momondo.

  • KLM Flights From London to Seattle

    KLM (7.8/10 from 1,643 reviews) operates around 14 flights from London to Seattle in any given week. The average KLM airfare for this route is around £764, with deals from around £560 rare but found on momondo. Referenced prices are for round-trip London to Seattle flight searches in the last 72 hours.


American Airlines flights from London to Seattle

Our best American Airlines deals on London to Seattle flight tickets
American Airlines
22 Apr
LHR09:15London Heathrow
17h 49m
1 stop
SEA19:04Seattle/Tacoma Intl
28 Apr
SEA00:59Seattle/Tacoma Intl
23h 01m
1 stop
LHR08:00London Heathrow
American Airlines
15 May
LGW10:40London Gatwick
45h 35m
2 stops
SEA00:15Seattle/Tacoma Intl
22 May
SEA05:00Seattle/Tacoma Intl
19h 10m
2 stops
LGW08:10London Gatwick
American Airlines
15 May
LGW15:05London Gatwick
40h 00m
2 stops
SEA23:05Seattle/Tacoma Intl
22 May
SEA05:20Seattle/Tacoma Intl
19h 15m
2 stops
LGW08:35London Gatwick

British Airways flights from London to Seattle

Our best British Airways deals on London to Seattle flight tickets
British Airways
18 Sept
LHR09:50London Heathrow
9h 45m
SEA11:35Seattle/Tacoma Intl
1 Oct
SEA13:30Seattle/Tacoma Intl
9h 20m
LHR06:50London Heathrow
British Airways
6 May
LHR09:50London Heathrow
9h 45m
SEA11:35Seattle/Tacoma Intl
20 May
SEA19:40Seattle/Tacoma Intl
9h 20m
LHR13:00London Heathrow
British Airways
4 May
LHR09:50London Heathrow
9h 45m
SEA11:35Seattle/Tacoma Intl
7 May
SEA13:22Seattle/Tacoma Intl
12h 58m
1 stop
LHR10:20London Heathrow

How to get the cheapest flight ticket from London 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 to Seattle?

February. The cheapest time of year to fly to Seattle from London is February. The most expensive is July.

What is the cheapest day to depart London 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 to Seattle?

In the evening. London to Seattle flights are approximately 8% more expensive in the afternoon than in the evening

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

Air Canada. Air Canada, British Airways, and Icelandair are the most popular carriers operating from London to Seattle

What is the cheapest London to Seattle flight route?

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

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

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

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

The number of flights available between London and Seattle is 21 per day as of April 2024. The most frequent departure time is 11:00, with 53% of daily flights leaving at midday.

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

The number of flights available between London and Seattle is 149 per week as of April 2024. The most frequent departure day is Saturday, with 17% of weekly flights leaving on this day.

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

There are 2 cabin classes available to choose from on London 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 to Seattle flights?

You could potentially save up to 1% on your flight if you consider stops on a London to Seattle flight.

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

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

Best price found

£207

Fastest flight time

9h 45m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from London in the past 72 hours is £207. The best return flight deal from London to Seattle found on momondo in the last 72 hours is £481.
The fastest flight from London to Seattle takes 9h 45m
Direct flights go from London to Seattle every day.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

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

    A flight from London to Seattle/Tacoma Intl will travel around 4781.3 mi. By plane, this route typically takes 9h 45m.

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

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

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

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

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

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


Why use momondo?

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

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

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

Yes. momondo allows you to filter the results for London to Seattle flights to just show those with flexible booking policies.

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 can track prices for London to Seattle 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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