Question 1

Which is the best airline for flights from London to Seattle, Alaska Airlines or Delta?

Accepted Answer

The two airlines most popular with KAYAK users for flights from London to Seattle are Alaska Airlines and Delta. With an average price for the route of $981 and an overall rating of 7.9, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $851 and an overall rating of 7.8.

Question 2

How long does a flight from London to Seattle take?

Accepted Answer

Direct flights take on average 9h 45m to travel the 4,790 miles between London and Seattle.

Question 3

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

Accepted Answer

Each day, there are 5 nonstop flights that take off from London and land in Seattle, with an average flight time of 10h 02m. The most common departure time is 5:00 pm and most flights take off in the afternoon. Each week, there are 35 flights and there are the same amount of flights each day (5).

Question 4

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

Accepted Answer

Each day, there are 5 nonstop flights that take off from London and land in Seattle, with an average flight time of 10h 02m. The most common departure time is 5:00 pm and most flights take off in the afternoon. Each week, there are 35 flights and there are the same amount of flights each day (5).

Question 5

What is the cheapest flight from London to Seattle?

Accepted Answer

In the last 5 days, the lowest price for a flight from London to Seattle was $539 for a one-way ticket and $604 for a round-trip.

Question 6

Do I need a passport to fly between London and Seattle?

Accepted Answer

A passport is required to fly from London to Seattle.

Question 7

Which airlines fly most frequently between London and Seattle?

Accepted Answer

British Airways connects London to Seattle with 14 flights per week. Alaska Airlines also offers 7 flights per week, while Delta follows with 7 flights per week.

Question 8

Which airlines fly most frequently between London and Seattle?

Accepted Answer

British Airways connects London to Seattle with 14 flights per week. Alaska Airlines also offers 7 flights per week, while Delta follows with 7 flights per week.

Question 9

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 Friday. On your return trip to London, you should consider flying back on a Tuesday, and avoid Saturdays for better deals.

Question 10

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 Friday. On your return trip to London, you should consider flying back on a Tuesday, and avoid Saturdays for better deals.

Question 11

Which airports will I be using when flying from London to Seattle?

Accepted Answer

London has 4 major airports: London Gatwick, London Heathrow, London Luton, and London Stansted. Seattle/Tacoma Intl is the only airport in Seattle. You’ll usually find the cheapest deals if you fly from London Gatwick Airport.

Question 12

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

Accepted Answer

Early birds can take the earliest flight from London at 9:50 am and will be landing in Seattle at 11:35 am.

Question 13

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

Accepted Answer

If you prefer to fly at night, the latest flight from London to Seattle jets off at 6:30 pm and lands at 8:46 pm.

Question 14

Which airlines fly non-stop between London and Seattle?

Accepted Answer

There are 6 airlines that fly nonstop from London to Seattle. They are: Alaska Airlines, American Airlines, British Airways, Delta, KLM and Virgin Atlantic. The cheapest price of all airlines flying this route was found with KLM at $485 for a round-trip flight. On average, the best prices for this route can be found at KLM.

Question 15

Which airlines fly non-stop between London and Seattle?

Accepted Answer

There are 6 airlines that fly nonstop from London to Seattle. They are: Alaska Airlines, American Airlines, British Airways, Delta, KLM and Virgin Atlantic. The cheapest price of all airlines flying this route was found with KLM at $485 for a round-trip flight. On average, the best prices for this route can be found at KLM.

Question 16

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

Accepted Answer

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

Question 17

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 18

Which airline alliances offer flights from London to Seattle?

Accepted Answer

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

Question 19

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

Accepted Answer

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

Question 20

Are there any passenger lounges at Stansted Airport?

Accepted Answer

Those flying from London’s Stansted Airport (STN) can relax in style at the Escape Lounge. You can find this lounge in the main departure area once you have passed through security and the duty-free area. You can pre-book your entry into the lounge for £25 per person, however infants younger than 2 years can enter free of charge. The lounge is open from 4:00 – 22:30 daily.

Question 21

How do I travel from Seattle Airport into the city?

Accepted Answer

If you would like to use public transport to travel into the city from Seattle Airport, you can catch the Red Line of the Link Light Rail train system from the airport station to Pioneer Square Station in downtown Seattle. The trip takes about 40min. There are also a number of bus services that can take you throughout the greater Seattle area, including the 574 line to Tacoma, taking approximately 30min.

Question 22

How do I get to Gatwick Airport?

Accepted Answer

The fastest way to get to London’s Gatwick Airport (LGW) using public transport from Central London is to take the Gatwick Express train. You can catch this train from Victoria Station every day from 5:00 – midnight. This train runs every 15min, stopping at Gatwick Airport’s South Terminal and taking 30min. Alternatively, the Thameslink also runs to Gatwick Airport in 30min from London Bridge Station every 20min.

Question 23

What restaurants are there at Heathrow Airport?

Accepted Answer

If you have time before you fly from Heathrow Airport (LHR), you can enjoy a wide range of restaurants and dining options throughout the airport, depending on which terminal you are flying from. If you’re looking for a sit-down meal, you can find the Gorgeous Kitchen in Terminal 2, The Curator or The Cavier House & Prunier in Terminal 3, The Prince of Wales or Comptoir Libanais in Terminal 4 or the Crown Rivers Bar & Food at Terminal 5.

Question 24

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

Accepted Answer

The cheapest month for flights from London to Seattle is February, where tickets cost $648 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is $862 and $858 respectively.

Question 25

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

Accepted Answer

The cheapest month for flights from London to Seattle is February, where tickets cost $648 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is $862 and $858 respectively.

Question 26

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.

Question 27

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 travelers know whether to wait or book now.

Question 28

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.

Question 29

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.

Question 30

What is the cheapest layover airport when flying from London to Seattle?

Accepted Answer

Flights via Vancouver (YVR) offer the most affordable fares, with an average round-trip price of $660.

Question 31

What is the most popular layover airport when flying from London to Seattle?

Accepted Answer

Reykjavik (KEF) is the top choice – 66% of KAYAK users who clicked on 1-stop flights from London to Seattle picked an itinerary connecting there.

Question 32

Which layover airport has the quickest connection when flying from London to Seattle?

Accepted Answer

If you prefer a quick connection, Frankfurt am Main (FRA) often has the shortest layovers from London to Seattle, with an average of 1h 30m.

Question 33

Which layover airport offers the shortest total travel time from London to Seattle?

Accepted Answer

Consider flying via Vancouver (YVR) for the shortest journey. The average one-way travel time for flights connecting there is 12h 33m.

Question 34

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 128 minutes.

Question 35

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 5% of their flights encountering any delays.

Question 36

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 Tuesday has typically experienced more delays than other days.

Question 37

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 38

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

Accepted Answer

There are 3 cabin class options for the route. These are Business, Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

Question 39

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

Accepted Answer

There are 3 cabin class options for the route. These are Business, Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

Question 40

Which airlines provide the cheapest flights from London to Seattle?

Accepted Answer

In the past 5 days, the cheapest round-trip tickets from London to Seattle were found on United Airlines ($608) and Icelandair ($612).

Question 41

Which airlines provide the cheapest flights from London to Seattle?

Accepted Answer

In the past 5 days, the cheapest round-trip tickets from London to Seattle were found on United Airlines ($608) and Icelandair ($612).

Question 42

What is the cheapest London to Seattle flight route?

Accepted Answer

The cheapest return flight from London to Seattle costs $381 on the route between London Heathrow Airport (LHR) and Seattle (SEA). It is also the most popular route.

Question 43

What is the cheapest London to Seattle flight route?

Accepted Answer

The cheapest return flight from London to Seattle costs $381 on the route between London Heathrow Airport (LHR) and Seattle (SEA). It is also the most popular route.

Question 44

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

Accepted Answer

To get a below average price on the flight from London to Seattle, you should book around 3 weeks before departure, which saves you about 22% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.

Question 45

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

Accepted Answer

To get a below average price on the flight from London to Seattle, you should book around 3 weeks before departure, which saves you about 22% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.

Question 46

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

Accepted Answer

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $788 on average.

Question 47

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

Accepted Answer

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $788 on average.

Question 48

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

Accepted Answer

Flight prices are below average for this route right now.Flights to Seattle from London usually cost between $701 and $914 in November.
The lowest price found in the past 5 days was $604 on Multiple Airlines (Nov 4-Nov 23).

Question 49

What are the most popular airlines flying to Seattle?

Accepted Answer

The most popular airline among KAYAK users flying to Seattle is British Airways, followed by Virgin Atlantic and Delta.

Low season	February
High season	August
Cheapest flight	$540

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Everything you should know

Cheap Flights from London to Seattle (LON-SEA)

Recent round-trip flight deals from London to Seattle

Recent one-way flight deals from London to Seattle

Recent last minute flight deals from London to Seattle

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KAYAK's insights & trends for London to Seattle flights

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

What is the cheapest London to Seattle flight route?

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

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

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

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

Which airlines provide the cheapest flights from London to Seattle?

Which airlines fly most frequently between London and Seattle?

Which airlines fly non-stop between London and Seattle?

How often are flights from London to Seattle delayed?

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

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

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

What is the most popular layover airport when flying from London to Seattle?

What is the cheapest layover airport when flying from London to Seattle?

Which layover airport offers the shortest total travel time from London to Seattle?

Which layover airport has the quickest connection when flying from London to Seattle?

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

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

How long does a flight from London to Seattle take?

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

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

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