How long does a flight from London to Seattle take?

Nonstop flights from London generally make it to Seattle in 9h 45m . The flying distance between the two cities is 12,387 km. Visit our flight page for the latest deals!>/a>

How many flights are there between London Heathrow Airport and Seattle per day?

Each day, there are 4 nonstop flights that take off from London Heathrow Airport and land in Seattle, with an average flight time of 10h 02m. The most common departure time is 4:00 p.m. and most flights take off in the afternoon. Each week, there are 28 flights and there are the same amount of flights each day (4). Visit our flight page for the latest deals!>/a>

What is the cheapest flight from London Heathrow Airport to Seattle?

In the last 3 days, the lowest price for a flight from London Heathrow Airport to Seattle was C$ 528 for a one-way ticket and C$ 561 for a round-trip. Visit our flight page for the latest deals!>/a>

Which airlines fly most frequently between London and Seattle?

British Airways connects London to Seattle with 14 flights per week. Delta also offers 7 flights per week, while Virgin Atlantic follows with 7 flights per week. Visit our flight page for the latest deals!>/a>

What’s the earliest departure time from London to Seattle?

Early birds can take the earliest flight from London Heathrow Airport at 9:25 am and will be landing in Seattle at 11:10 am.

What’s the latest departure time from London to Seattle?

If you prefer to fly at night, the latest flight from London Heathrow Airport to Seattle jets off at 6:30 pm and lands at 8:50 pm.

Which airlines offer Wi-Fi service onboard planes from London to Seattle?

KLM, Delta, Air France, and Virgin Atlantic offer inflight Wi-Fi service on the London to Seattle flight route.

Which aircraft models fly most regularly from London to Seattle?

The Boeing 787-10 Dreamliner is the aircraft model that flies most regularly on the London to Seattle flight route.

Which airline alliances offer flights from London to Seattle?

oneworld, and SkyTeam are the airline alliances operating flights between London and Seattle, with SkyTeam being the most commonly used for this route.

On which days can I fly direct from London to Seattle?

There are direct flights from London to Seattle on a daily basis.

How does KAYAK find such low prices on flights from London to Seattle?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London to Seattle. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London to Seattle?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from London is likely to change within 7 days, so travellers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from London to Seattle?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to London with another airline. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London to Seattle?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from London up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

Which cabin class options are there for flights between London Heathrow Airport and Seattle?

There are 2 cabin class options for the route. These are Business and Economy . Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

Which airlines provide the cheapest flights from London to Seattle?

In the past 3 days, the cheapest round-trip tickets from London to Seattle were found on British Airways (C$ 777) and Delta (C$ 782).

C$ 731 CHEAP FLIGHTS from London to Seattle (LHR - SEA)

LHR - SEA

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Flights Deals

Cheap Flight Deals from London to Seattle (LHR-SEA)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from London to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from London to Seattle

KAYAK's recommended round-trip deals from the most popular airlines that fly from London to Seattle.

Discover the best prices for you by selecting your travel dates on KAYAK.

6:15 a.m. - 5:50 p.m.LHR-SEA

19h 35m1 stop

7:35 p.m. - 8:20 p.m.SEA-LHR

16h 45m1 stop

C$ 777British Airways

Find Deal

Wed, 3 Sep - Wed, 17 Sep

8:40 a.m. - 3:55 p.m.LHR-SEA

15h 15m1 stop

8:25 p.m. - 2:15 p.m.SEA-LHR

9h 50mdirect

C$ 782Delta

Find Deal

Mon, 9 Jun - Tue, 16 Sep

1:05 p.m. - 8:40 p.m.LHR-SEA

15h 35m1 stop

3:45 p.m. - 8:20 p.m.SEA-LHR

20h 35m1 stop

C$ 813Icelandair

Find Deal

Sat, 10 May - Fri, 16 May

1:05 p.m. - 5:50 p.m.LHR-SEA

12h 45m1 stop

3:45 p.m. - 11:55 a.m.SEA-LHR

12h 10m1 stop

C$ 815Icelandair

Find Deal

Sat, 10 May - Fri, 16 May

9:00 a.m. - 4:59 p.m.LHR-SEA

15h 59m1 stop

10:55 a.m. - 8:20 a.m.SEA-LHR

13h 25m1 stop

C$ 855

Find Deal

Wed, 17 Sep - Thu, 25 Sep

7:25 a.m. - 4:59 p.m.LHR-SEA

17h 34m1 stop

11:11 a.m. - 11:45 a.m.SEA-LHR

16h 34m2 stops

C$ 860United Airlines

Find Deal

Fri, 29 Aug - Wed, 17 Sep

7:25 a.m. - 4:59 p.m.LHR-SEA

17h 34m1 stop

10:55 p.m. - 6:55 a.m.SEA-LHR

24h 00m1 stop

C$ 862United Airlines

Find Deal

Wed, 10 Sep - Mon, 15 Sep

9:55 a.m. - 3:57 p.m.LHR-SEA

14h 02m1 stop

8:25 p.m. - 2:15 p.m.SEA-LHR

9h 50mdirect

C$ 876

Find Deal

Mon, 19 May - Mon, 2 Jun

7:50 p.m. - 1:50 p.m.LHR-SEA

26h 00m2 stops

4:00 p.m. - 4:00 p.m.SEA-LHR

16h 00m1 stop

C$ 912Scandinavian Airlines

Find Deal

Thu, 22 May - Mon, 2 Jun

7:05 a.m. - 1:50 p.m.LHR-SEA

14h 45m2 stops

4:00 p.m. - 4:00 p.m.SEA-LHR

16h 00m1 stop

C$ 914Scandinavian Airlines

Find Deal

Mon, 26 May - Mon, 9 Jun

Expert advice

Expert advice for your flight from London to Seattle

Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are specific to the author and reflect their authentic experience, which may vary significantly from the experience of others.

KAYAK teamed up with top travel experts to share the best tips for your journey.

Airlines

KLM

Premium Comfort offers SkyPriority security and two checked bags, enhancing long-haul travel convenience.

KLM's World Business Class features lie-flat seats and direct aisle access for ultimate comfort.

KAYAK's insights & trends for London to Seattle flights

Get data-powered insights and trends into flights from London to Seattle to help you find the cheapest flights, the best time to fly and much more.

Prices

Airlines

Your flight ticket price will generally be cheaper if you fly to Seattle on a Friday and more expensive on a Saturday. On your return trip to London, you should consider flying back on a Sunday, and avoid Fridays for better deals.

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

The cheapest month for flights from London Heathrow Airport to Seattle is February, where tickets cost C$ 898 (return) on average. On the other hand, the most expensive months are July and August, where the average cost of round-trip tickets is C$ 1,373 and C$ 1,344 respectively.

Can I save money by flying with a layover from London Heathrow Airport to Seattle?

No, with an average price for the route of C$ 863, prices are generally cheapest when you fly direct.

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

To get a below average price on the flight from London Heathrow Airport to Seattle, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.

Find deals

Low season	January
High season	August
Cheapest flight	C$ 731

Best time to beat the crowds (11% less expensive on average)

Most popular time to fly (23% more expensive on average)

Flight from London to Seattle

When to book flights from London to Seattle

Are your dates flexible? Find out the best times to travel from London to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

What is the cheapest flight from London Heathrow Airport to Seattle?
In the last 3 days, the lowest price for a flight from London Heathrow Airport to Seattle was C$ 528 for a one-way ticket and C$ 561 for a round-trip.
Which airlines offer Wi-Fi service onboard planes from London to Seattle?
KLM, Delta, Air France, and Virgin Atlantic offer inflight Wi-Fi service on the London to Seattle flight route.
Which aircraft models fly most regularly from London to Seattle?
The Boeing 787-10 Dreamliner is the aircraft model that flies most regularly on the London to Seattle flight route.
Which airline alliances offer flights from London to Seattle?
oneworld, and SkyTeam are the airline alliances operating flights between London and Seattle, with SkyTeam being the most commonly used for this route.
On which days can I fly direct from London to Seattle?
There are direct flights from London to Seattle on a daily basis.
How does KAYAK find such low prices on flights from London to Seattle?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London to Seattle.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London to Seattle?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from London is likely to change within 7 days, so travellers know whether to wait or book now.
What is the Hacker Fare option on flights from London to Seattle?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to London with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London to Seattle?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from London up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Looking for a cheap flight? 25% of our users found flights on this route for C$ 1,179 or less round-trip.

Direct departures

London Heathrow to Seattle/Tacoma Intl

Monday

Aer Lingus,Aeromexico,Air France, +9 more