Question 1

How long does a flight from London to Seattle take?

Accepted Answer

Nonstop flights from London generally make it to Seattle in 10h 00m. The flying distance between the two cities is 12,387 km. Visit our flight page for the latest deals!>/a>

Question 2

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

Accepted Answer

Each day, there are between 2 and 4 nonstop flights that take off from London Heathrow Airport and land in Seattle, with an average flight time of 10h 08m. The most common departure time is 2:00 p.m. and most flights take off in the afternoon. Each week, there are 21 flights. The most frequent day of departure is Tuesday, when 19% of all weekly flights depart. The fewest flights depart on a Wednesday. Visit our flight page for the latest deals!>/a>

Question 3

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

Accepted Answer

Each day, there are between 2 and 4 nonstop flights that take off from London Heathrow Airport and land in Seattle, with an average flight time of 10h 08m. The most common departure time is 2:00 p.m. and most flights take off in the afternoon. Each week, there are 21 flights. The most frequent day of departure is Tuesday, when 19% of all weekly flights depart. The fewest flights depart on a Wednesday. Visit our flight page for the latest deals!>/a>

Question 4

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

Accepted Answer

In the last 3 days, the lowest price for a flight from London Heathrow Airport to Seattle was C$ 661 for a one-way ticket and C$ 660 for a round-trip. <a href='/flight-routes/London-Heathrow-LHR/Seattle-Tacoma-Intl-SEA'>Visit our flight page for the latest deals!>/a>

Question 5

Which airlines fly most frequently between London and Seattle?

Accepted Answer

London and Seattle are connected by different airlines. The airlines that fly that route the most regularly are British Airways (10 flights per week), Delta (7 flights per week), and Virgin Atlantic (4 flights per week). Visit our flight page for the latest deals!>/a>

Question 6

Which airlines fly most frequently between London and Seattle?

Accepted Answer

London and Seattle are connected by different airlines. The airlines that fly that route the most regularly are British Airways (10 flights per week), Delta (7 flights per week), and Virgin Atlantic (4 flights per week). Visit our flight page for the latest deals!>/a>

Question 7

What’s the cheapest day of the week to fly from London to Seattle?

Accepted Answer

Your flight ticket price will generally be cheaper if you fly to Seattle on a Monday and more expensive on a Thursday. On your return trip to London, you should consider flying back on a Sunday, and avoid Fridays for better deals. Visit our flight page for the latest deals!>/a>

Question 8

What’s the cheapest day of the week to fly from London to Seattle?

Accepted Answer

Your flight ticket price will generally be cheaper if you fly to Seattle on a Monday and more expensive on a Thursday. On your return trip to London, you should consider flying back on a Sunday, and avoid Fridays for better deals. Visit our flight page for the latest deals!>/a>

Question 9

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

Accepted Answer

Early birds can take the earliest flight from London Heathrow Airport at 9:25 am and will be landing in Seattle at 11:30 am.

Question 10

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

Accepted Answer

If you prefer to fly at night, the latest flight from London Heathrow Airport to Seattle jets off at 3:05 pm and lands at 5:10 pm.

Question 11

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

Accepted Answer

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

Question 12

Which aircraft models fly most regularly from London to Seattle?

Accepted Answer

The Boeing 787-9 Dreamliner is the aircraft model that flies most regularly on the London to Seattle flight route.

Question 13

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

Accepted Answer

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

Question 14

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

Accepted Answer

The cheapest month for flights from London Heathrow Airport to Seattle is February, where tickets cost C$ 834 (return) on average. On the other hand, the most expensive months are July and December, where the average cost of round-trip tickets is C$ 1,288 and C$ 1,208 respectively.

Question 15

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

Accepted Answer

The cheapest month for flights from London Heathrow Airport to Seattle is February, where tickets cost C$ 834 (return) on average. On the other hand, the most expensive months are July and December, where the average cost of round-trip tickets is C$ 1,288 and C$ 1,208 respectively.

Question 16

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

Accepted Answer

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. <a href='/flight-routes/London-Heathrow-LHR/Seattle-Tacoma-Intl-SEA'>Visit our flight page for the latest deals!>/a>

Question 17

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

Accepted Answer

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. <a href='/flight-routes/London-Heathrow-LHR/Seattle-Tacoma-Intl-SEA'>Visit our flight page for the latest deals!>/a>

Question 18

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

Accepted Answer

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. <a href='/flight-routes/London-Heathrow-LHR/Seattle-Tacoma-Intl-SEA'>Visit our flight page for the latest deals!>/a>

Question 19

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

Accepted Answer

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. <a href='/flight-routes/London-Heathrow-LHR/Seattle-Tacoma-Intl-SEA'>Visit our flight page for the latest deals!>/a>

Question 20

How often are flights from London to Seattle delayed?

Accepted Answer

Weekly flights between London and Seattle historically see delays in approximately 11% of cases, with the average delay over the past year being 126 minutes.

Question 21

Which airline has the best punctuality record on London to Seattle flights?

Accepted Answer

Based on our data, Delta have experienced the fewest delays on this route in the past 12 months, with only about 4% of their flights encountering any delays.

Question 22

What day of the week experiences the fewest flight delays on this route?

Accepted Answer

Statistically, Thursday is the day of the week with the fewest delays on this flight route, while Wednesday has typically experienced more delays than other days.

Question 23

What is the most punctual flight time for London to Seattle flights?

Accepted Answer

Typically, flights leaving in the evening tend to face fewer delays, whereas flights in the early afternoon have historically encountered delays more often.

Question 24

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

Accepted Answer

There is only one cabin class option available for the route, which is Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

Question 25

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

Accepted Answer

There is only one cabin class option available for the route, which is Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

Question 26

Which airlines provide the cheapest flights from London to Seattle?

Accepted Answer

In the past 3 days, the cheapest round-trip tickets from London to Seattle were found on Icelandair (C$ 660) and United Airlines (C$ 690).

Question 27

Which airlines provide the cheapest flights from London to Seattle?

Accepted Answer

In the past 3 days, the cheapest round-trip tickets from London to Seattle were found on Icelandair (C$ 660) and United Airlines (C$ 690).

Question 28

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

Accepted Answer

To get a below average price on the flight from London Heathrow Airport to Seattle, you should book around 3 weeks before departure, which saves you about 17% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.

Question 29

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

Accepted Answer

To get a below average price on the flight from London Heathrow Airport to Seattle, you should book around 3 weeks before departure, which saves you about 17% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.

Question 30

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

Accepted Answer

No, with an average price for the route of C$ 1,180, prices are generally cheapest when you fly direct.

Question 31

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

Accepted Answer

No, with an average price for the route of C$ 1,180, prices are generally cheapest when you fly direct.

Question 32

How much is a round-trip flight from London Heathrow Airport to Seattle?

Accepted Answer

Flight prices are below average for this route right now.Flights to Seattle from London Heathrow Airport usually cost between C$ 765 and C$ 1,038 in February.
The lowest price found in the past 3 days was C$ 660 on Icelandair (24 Feb-8 Mar).

Low season	January
High season	August
Cheapest flight	C$ 660

LHR - SEA

C$ 660 Find Cheap Flights from London to Seattle

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Everything you should know

Cheap Flights from London to Seattle (LHR-SEA)

Recent round-trip flight deals from London to Seattle

Recent one-way flight deals from London to Seattle

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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.

How much is a round-trip flight from London Heathrow Airport to Seattle?

What’s the cheapest day of the week to fly from London to Seattle?

Your flight ticket price will generally be cheaper if you fly to Seattle on a Monday and more expensive on a Thursday. 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$ 834 (return) on average. On the other hand, the most expensive months are July and December, where the average cost of round-trip tickets is C$ 1,288 and C$ 1,208 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$ 1,180, 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 3 weeks before departure, which saves you about 17% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.

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 Icelandair (C$ 660) and United Airlines (C$ 690).

Which airlines fly most frequently between London and Seattle?

London and Seattle are connected by different airlines. The airlines that fly that route the most regularly are British Airways (10 flights per week), Delta (7 flights per week), and Virgin Atlantic (4 flights per week).

How often are flights from London to Seattle delayed?

Weekly flights between London and Seattle historically see delays in approximately 11% of cases, with the average delay over the past year being 126 minutes.

What is the most punctual flight time for London to Seattle flights?

Typically, flights leaving in the evening tend to face fewer delays, whereas flights in the early afternoon have historically encountered delays more often.

What day of the week experiences the fewest flight delays on this route?

Statistically, Thursday is the day of the week with the fewest delays on this flight route, while Wednesday has typically experienced more delays than other days.

Which airline has the best punctuality record on London to Seattle flights?

Based on our data, Delta have experienced the fewest delays on this route in the past 12 months, with only about 4% of their flights encountering any delays.

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

There is only one cabin class option available for the route, which is Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

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

How long does a flight from London to Seattle take?

Nonstop flights from London generally make it to Seattle in 10h 00m. The flying distance between the two cities is 12,387 km.

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 11:30 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 3:05 pm and lands at 5:10 pm.

Expert advice for your flight from London to Seattle

Good to know

When to book flights from London to Seattle

FAQs for booking London to Seattle flights

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$ 661 for a one-way ticket and C$ 660 for a round-trip.

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

Air France, Delta, KLM, 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 787-9 Dreamliner is the aircraft model that flies most regularly on the London to Seattle flight 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.

KAYAK’s top tips for finding a cheap flight from London Heathrow Airport to Seattle

Prefer to fly direct from London to Seattle?

Everything you need to know for your flight from London to Seattle

Information on your arrival and departure airports

Cabin class types available on flights to Seattle

Complete your trip to Seattle with a hotel stay or car rental

Find direct flights to and from London and Seattle

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Flights from domestic origins to Seattle

Choose which airport to fly into in London

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