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Cheap flights from London Heathrow Airport to Seattle from £303

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 7/5. 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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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

£303

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 £303. The best return flight deal from London Heathrow Airport to Seattle found on momondo in the last 72 hours is £459.
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 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 morning. London Heathrow Airport to Seattle flights are approximately 5% more expensive in the afternoon than in the morning

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

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

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

45 days before. The cheapest time to buy a flight from London Heathrow Airport to Seattle is approximately 45 days to departure

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

As of March 2024, 21 flights take off from London Heathrow Airport and land in Seattle each day. The most common flight departure time for this route is 11:00, with 51% of daily flights taking off in the afternoon.

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

149 flights are operational weekly from London Heathrow Airport to Seattle as of March 2024. The most popular departure day for this route is Saturday, with 17% of flights per week taking off on this day.

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

There are 2 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 3% on your flight if you consider stops on a London Heathrow Airport to Seattle flight.

If you are looking to fly from London to Seattle, you are most likely going to fly from London Heathrow Airport to Seattle/Tacoma Intl Airport, the most popular airports on that route. In March, £471 is typically the cheapest round trip price you’ll find from London to Seattle which you can find when you fly LHR — SEA.

London Heathrow Airport (LHR) to Seattle/Tacoma Intl Airport (SEA)£471
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Easily compare return flights from London Heathrow Airport 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 Heathrow Airport to Seattle by changing tabs
Air Canada
15 Apr
LHR10:15London Heathrow
19h 37m
2 stops
SEA21:52Seattle/Tacoma Intl
22 Apr
SEA13:10Seattle/Tacoma Intl
14h 40m
2 stops
LHR11:50London Heathrow
Lufthansa
15 Apr
LHR14:10London Heathrow
12h 17m
1 stop
SEA18:27Seattle/Tacoma Intl
22 Apr
SEA12:50Seattle/Tacoma Intl
12h 50m
1 stop
LHR09:40London Heathrow
Virgin Atlantic
15 Apr
LHR12:45London Heathrow
9h 55m
SEA14:40Seattle/Tacoma Intl
22 Apr
SEA07:20Seattle/Tacoma Intl
15h 25m
1 stop
LHR06:45London Heathrow
Austrian Airlines
16 Apr
LHR19:30London Heathrow
31h 15m
2 stops
SEA18:45Seattle/Tacoma Intl
23 Apr
SEA08:06Seattle/Tacoma Intl
14h 39m
1 stop
LHR06:45London Heathrow
Icelandair
17 Sept
LHR21:25London Heathrow
31h 10m
1 stop
SEA20:35Seattle/Tacoma Intl
26 Sept
SEA15:50Seattle/Tacoma Intl
12h 05m
1 stop
LHR11:55London Heathrow
United Airlines
17 Apr
LHR06:30London Heathrow
20h 11m
2 stops
SEA18:41Seattle/Tacoma Intl
24 Apr
SEA08:20Seattle/Tacoma Intl
18h 20m
2 stops
LHR10:40London Heathrow

Find the cheapest one-way flights from London Heathrow Airport to Seattle

If you're looking for one-way flights from London Heathrow Airport to Seattle, view some of our deals below provided by Iberia, Icelandair and Virgin Atlantic
Multiple Airlines
7 May
LHR20:35London Heathrow
55h 54m
3 stops
SEA20:29Seattle/Tacoma Intl
Icelandair
7 May
LHR21:25London Heathrow
28h 15m
1 stop
SEA17:40Seattle/Tacoma Intl
Virgin Atlantic
10 Apr
LHR13:55London Heathrow
18h 37m
1 stop
SEA00:32Seattle/Tacoma Intl

Search last-minute flights to Seattle from London Heathrow Airport

Find and compare return flight prices for your last-minute flight from London Heathrow Airport to Seattle
Delta
8 Apr
LHR08:40London Heathrow
16h 00m
1 stop
SEA16:40Seattle/Tacoma Intl
22 Apr
SEA05:35Seattle/Tacoma Intl
20h 25m
1 stop
LHR10:00London Heathrow
United Airlines
8 Apr
LHR16:15London Heathrow
16h 43m
1 stop
SEA00:58Seattle/Tacoma Intl
22 Apr
SEA19:10Seattle/Tacoma Intl
17h 30m
3 stops
LHR20:40London Heathrow
British Airways
8 Apr
LHR16:00London Heathrow
9h 45m
SEA17:45Seattle/Tacoma Intl
22 Apr
SEA19:40Seattle/Tacoma Intl
9h 20m
LHR13:00London Heathrow
Virgin Atlantic
8 Apr
LHR12:45London Heathrow
9h 55m
SEA14:40Seattle/Tacoma Intl
22 Apr
SEA16:30Seattle/Tacoma Intl
9h 20m
LHR09:50London Heathrow
Air Canada
8 Apr
LHR12:05London Heathrow
16h 48m
1 stop
SEA20:53Seattle/Tacoma Intl
16 Apr
SEA05:50Seattle/Tacoma Intl
16h 40m
2 stops
LHR06:30London Heathrow
American Airlines
8 Apr
LHR09:50London Heathrow
9h 45m
SEA11:35Seattle/Tacoma Intl
16 Apr
SEA13:30Seattle/Tacoma Intl
9h 20m
LHR06:50London Heathrow

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 £276Free CancellationRating
8.0
11,402 reviews
Search Delta flights
Virgin AtlanticPriceFrom £385Free CancellationRating
7.7
755 reviews
Search Virgin Atlantic flights
American AirlinesPriceFrom £413Free CancellationRating
7.3
15,181 reviews
Search American Airlines flights
IcelandairPriceFrom £414Free CancellationRating
7.1
1,404 reviews
Search Icelandair flights
British AirwaysPriceFrom £414Free CancellationRating
6.8
6,960 reviews
Search British Airways flights
Air CanadaPriceFrom £428Free CancellationRating
7.0
6,744 reviews
Search Air Canada flights
FinnairPriceFrom £435Free CancellationRating
7.7
1,377 reviews
Search Finnair flights
LufthansaPriceFrom £440Free CancellationRating
7.0
7,882 reviews
Search Lufthansa flights
KLMPriceFrom £443Free CancellationRating
7.8
1,684 reviews
Search KLM flights
United AirlinesPriceFrom £445Free CancellationRating
7.4
11,470 reviews
Search United Airlines flights
  • Delta Flights From London Heathrow Airport to Seattle

    Delta operates around 14 flights from London Heathrow Airport to Seattle every week. The average price of these flights found in the last 72 hours has been £682, but momondo users have found Delta deals from London Heathrow Airport to Seattle from as low as £349 round-trip. Delta has been scored 8.0/10 in 11,402 reviews.

  • KLM Flights From London Heathrow Airport to Seattle

    KLM (7.8/10 from 1,684 reviews) operates around 14 flights from London Heathrow Airport to Seattle in any given week. The average KLM airfare for this route is around £758, with deals from around £560 rare but found on momondo. Referenced prices are for round-trip London Heathrow Airport to Seattle flight searches in the last 72 hours.


Austrian Airlines flights from London Heathrow Airport to Seattle

Our best Austrian Airlines deals on London Heathrow Airport to Seattle flight tickets
Austrian Airlines
16 Apr
LHR19:30London Heathrow
31h 15m
2 stops
SEA18:45Seattle/Tacoma Intl
23 Apr
SEA08:06Seattle/Tacoma Intl
14h 39m
1 stop
LHR06:45London Heathrow
Austrian Airlines
23 Apr
LHR06:00London Heathrow
20h 45m
2 stops
SEA18:45Seattle/Tacoma Intl
30 Apr
SEA07:00Seattle/Tacoma Intl
20h 45m
1 stop
LHR11:45London Heathrow

Icelandair flights from London Heathrow Airport to Seattle

Our best Icelandair deals on London Heathrow Airport to Seattle flight tickets
Icelandair
17 Sept
LHR21:25London Heathrow
31h 10m
1 stop
SEA20:35Seattle/Tacoma Intl
26 Sept
SEA15:50Seattle/Tacoma Intl
12h 05m
1 stop
LHR11:55London Heathrow
Icelandair
16 Sept
LHR13:05London Heathrow
12h 50m
1 stop
SEA17:55Seattle/Tacoma Intl
30 Sept
SEA15:50Seattle/Tacoma Intl
20h 30m
1 stop
LHR20:20London Heathrow
Icelandair
9 Sept
LHR13:05London Heathrow
12h 50m
1 stop
SEA17:55Seattle/Tacoma Intl
23 Sept
SEA18:55Seattle/Tacoma Intl
33h 00m
1 stop
LHR11:55London Heathrow

  • 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 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 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.


Alternative routes for London Heathrow Airport to Seattle

Compare alternative flights to and from nearby airports and cities to discover the best prices and most convenient flight times
London to Seattle Flights
Fastest flight time12h 40m
Cheapest price£473
London to Spokane Flights
Fastest flight time14h 04m
Cheapest price£560
London to Pasco Flights
Fastest flight time19h 16m
Cheapest price£636
London to Bellingham Flights
Fastest flight time18h 49m
Cheapest price£1,069

Similar London Heathrow Airport to Seattle flights

Flexible with your destination? Broaden your search and find flights similar to your London Heathrow Airport to Seattle route

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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