Question 1

What is the cheapest flight from London to Seattle?

Accepted Answer

In the last 3 days, the lowest price for a flight from London to Seattle was $409 for a round-trip ticket. <a href='/flight-routes/London-YXU/Seattle-Tacoma-Intl-SEA'>Visit our flight page for the latest deals!>/a>

Question 2

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

Accepted Answer

A passport is required to fly from London to Seattle. <a href='/flight-routes/London-YXU/Seattle-Tacoma-Intl-SEA'>Visit our flight page for the latest deals!>/a>

Question 3

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

Accepted Answer

If you are looking for a flight deal from London to Seattle, look for departures on Saturdays and avoid leaving on a Monday, as it's usually the priciest day. When flying back from Seattle, Thursday is the cheapest day to fly and Tuesday is the most expensive. Visit our flight page for the latest deals!>/a>

Question 4

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

Accepted Answer

If you are looking for a flight deal from London to Seattle, look for departures on Saturdays and avoid leaving on a Monday, as it's usually the priciest day. When flying back from Seattle, Thursday is the cheapest day to fly and Tuesday is the most expensive. Visit our flight page for the latest deals!>/a>

Question 5

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

Accepted Answer

When flying out of London you will be using London. You will be landing at Seattle, also known as Seattle/Tacoma Intl. <a href='/flight-routes/London-YXU/Seattle-Tacoma-Intl-SEA'>Visit our flight page for the latest deals!>/a>

Question 6

Which aircraft models fly most regularly from London to Seattle?

Accepted Answer

We unfortunately don’t have that data for this specific route.

Question 7

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-YXU/Seattle-Tacoma-Intl-SEA'>Visit our flight page for the latest deals!>/a>

Question 8

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

Question 9

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. Booking your flights between London and SEA can sometimes prove cheaper using this method. <a href='/flight-routes/London-YXU/Seattle-Tacoma-Intl-SEA'>Visit our flight page for the latest deals!>/a>

Question 10

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-YXU/Seattle-Tacoma-Intl-SEA'>Visit our flight page for the latest deals!>/a>

Question 11

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

Accepted Answer

Flights via Calgary (YYC) offer the most affordable fares, with an average round-trip price of $264.

Question 12

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

Accepted Answer

Calgary (YYC) is the top choice – 50% of KAYAK users who clicked on 1-stop flights from London to Seattle picked an itinerary connecting there.

Question 13

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

Accepted Answer

If you prefer a quick connection, Calgary (YYC) often has the shortest layovers from London to Seattle, with an average of 3h 52m.

Question 14

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

Accepted Answer

Consider flying via Toronto (YYZ) for the shortest journey. The average one-way travel time for flights connecting there is 9h 05m.

Question 15

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 United Airlines ($409) and WestJet ($525).

Question 16

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 United Airlines ($409) and WestJet ($525).

Question 17

What are the most popular airlines flying to Seattle/Tacoma Intl?

Accepted Answer

The most popular airline among KAYAK users flying to Seattle/Tacoma Intl is Alaska Airlines, followed by Air Canada and WestJet.

YXU - SEA

$409 Find Cheap Flights from London to Seattle

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

Everything you should know

Cheap Flights from London to Seattle (YXU-SEA)

Recent round-trip flight deals from London to Seattle

Recent one-way flight deals from London to Seattle

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.

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

If you are looking for a flight deal from London to Seattle, look for departures on Saturdays and avoid leaving on a Monday, as it's usually the priciest day. When flying back from Seattle, Thursday is the cheapest day to fly and Tuesday is the most expensive.

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 United Airlines ($409) and WestJet ($525).

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

Calgary (YYC) is the top choice – 50% of KAYAK users who clicked on 1-stop flights from London to Seattle picked an itinerary connecting there.

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

Flights via Calgary (YYC) offer the most affordable fares, with an average round-trip price of $264.

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

Consider flying via Toronto (YYZ) for the shortest journey. The average one-way travel time for flights connecting there is 9h 05m.

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

If you prefer a quick connection, Calgary (YYC) often has the shortest layovers from London to Seattle, with an average of 3h 52m.

Good to know

When to book flights from London to Seattle

FAQs for booking flights from London to Seattle

What is the cheapest flight from London to Seattle?

In the last 3 days, the lowest price for a flight from London to Seattle was $409 for a round-trip ticket.

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

A passport is required to fly from London to Seattle.

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

When flying out of London you will be using London. You will be landing at Seattle, also known as Seattle/Tacoma Intl.

Which aircraft models fly most regularly from London to Seattle?

We unfortunately don’t have that data for this specific route.

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 travelers 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. Booking your flights between London and SEA can sometimes prove cheaper using this method.

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.

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 from London to Seattle

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

Find direct flights to and from London and Seattle

Flights to other popular destinations

Flights from domestic origins to Seattle

Choose which airport to fly into in Seattle

Find deals for your return flight