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 $157 for a one-way ticket and $417 for a round-trip. <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

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 4

Which aircraft models fly most regularly from London to Seattle?

Accepted Answer

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

Question 5

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 6

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 7

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 8

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 9

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 WestJet ($424) and Air Canada ($544).

Question 10

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 WestJet ($424) and Air Canada ($544).

Question 11

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.

Low season	May
High season	May
Cheapest flight	$157

YXU - SEA

$157 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.

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 WestJet ($424) and Air Canada ($544).

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 $157 for a one-way ticket and $417 for a round-trip.

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