Question 1

What are the cheapest airlines flying from London to Seattle round-trip?

Accepted Answer

Cheapflights users have booked flights from London to Seattle round-trip from $592. Other airlines that can offer you cheap pricing are Icelandair, from $608, and Finnair, from $614. Virgin Atlantic is currently priced 14% below the average price you’ll pay for this route.

Question 2

How recently were the London to Seattle flight deals updated?

Accepted Answer

The London to Seattle flight deals you see on this page were last updated on 5/30.

Question 3

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

Accepted Answer

To ensure you get the cheapest price possible for a flight from London to Seattle, you should look to book at least 43 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Question 4

What is the cheapest month to book a flight from London to Seattle?

Accepted Answer

Currently, January is the cheapest month in which you can book a flight from London to Seattle (average of $247). Flying from London to Seattle in July is currently the most expensive (average of $406). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Question 5

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

Accepted Answer

Travelers seeking maximum savings on their London to Seattle flight should consider departing on Tuesday at noon when fares are most often at their lowest. Thursday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Question 6

What are the most popular routes from London to Seattle?

Accepted Answer

Most travelers choose London Heathrow - Seattle/Tacoma Intl, London Gatwick - Seattle/Tacoma Intl or London City - Seattle/Tacoma Intl when deciding on the best route from London to Seattle.

Question 7

What are the cheapest flights from London to Seattle?

Accepted Answer

While on average a flight from London to Seattle is generally $3,358, our data shows the cheapest flight currently is $665. When looking at the most popular route, (London Heathrow - Seattle/Tacoma Intl), you can expect to pay $583 for that flight.

Question 8

What are the most reliable airlines from London to Seattle?

Accepted Answer

The top 3 most reliable airlines when flying from London to Seattle are KLM (75%), American Airlines (73%) and Aer Lingus (73%).

Question 9

What are the most popular airlines that fly from London to Seattle?

Accepted Answer

Consider American Airlines, Finnair or British Airways when booking your flight. These represent the most popular airlines when flying from London to Seattle.

Question 10

Can I find flights from London to Seattle for under $600 on Cheapflights?

Accepted Answer

Yes, there are multiple flights from London to Seattle for under $600. The cheapest flight booked recently is on Multiple Airlines for just $564, but on average you can expect to pay $615.

Question 11

Are there nonstop flights from London to Seattle for under $600 on Cheapflights?

Accepted Answer

Cheapflights has at least 20 direct flights from London to Seattle under $600. A good price for a nonstop flight from London to Seattle is less than $658.

Question 12

Are there last-minute flights available from London to Seattle for under $700?

Accepted Answer

There are currently 20+ open flights from London to Seattle within the next 7 days for less than $700.

Question 13

What is the cheapest day to fly round-trip from London to Seattle?

Accepted Answer

Flights from London to Seattle are found to be more expensive on Friday. This shouldn't discourage you from searching as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Seattle.

Question 14

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

Accepted Answer

To save on the cost of your flight from London to Seattle, book at least 44 days before your planned departure. Booking around this time can save you about 35% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $697 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $925.

Question 15

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

Accepted Answer

The best pricing can be found in the month of November. Prices to Seattle from London average $696. You can even find prices in November for less than $696, as users have found deals to Seattle from as low as $384. The month of July appears to be one of the more expensive times to travel to Seattle from London. Flying in the targeted month can save you up to 29%.

Question 16

What is the cheapest time of day to fly from LON to SEA?

Accepted Answer

One of the essential ways to save on airfare from London to Seattle is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 11% on airfare.

Question 17

What airport do you fly into for flights to Seattle from London?

Accepted Answer

Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly into when you book flights from London to Seattle. 9 airlines have flights to Seattle/Tacoma Intl from London on a regular basis. Booking flights from London to Seattle/Tacoma Intl should not be difficult; the airport handles an average of 21 inbound flights from London per day.

Question 18

Accepted Answer

If you’re traveling from London to Seattle, one of the more common airlines traveling that route is Finnair. London to Seattle flights are typically 79% cheaper than other airlines traveling the same route. Flights from Finnair typically cost $781.84 RT. The cheapest Finnair flight found for this route was $574. London Heathrow Airport is the most common London airport to take off from when flying to Seattle. Seattle/Tacoma Intl Airport is the most popular arrival airport in Seattle. When flying from London to Seattle, Finnair flights are 10% more popular than any other airline flying that same route.

Question 19

Accepted Answer

British Airways is one of the most popular airlines used for those traveling from London to Seattle. Flights on this route from British Airways typically cost $751.06 RT, a price that is 84% more expensive than the average London to Seattle flight. The cheapest flight found was $611 RT. The most popular departure airport in London when flying to Seattle is London Heathrow Airport. The most popular airport to fly into when visiting Seattle is Seattle/Tacoma Intl Airport. When flying from London to Seattle, British Airways flights are 5% more popular than any other airline flying that same route.

Question 20

What does LHR to SEA mean?

Accepted Answer

Great question - LHR to SEA just means London Heathrow Airport to Seattle/Tacoma Intl Airport. Now you’ll know what these unique codes when you look for flights! This flight route has multiple associated airports, so we think it might be helpful to learn the name and codes of them as well. They are London Gatwick Airport (LGW), London Stansted Airport (STN), London Luton Airport (LTN), London City Airport (LCY), London Southend Airport (SEN).

Question 21

Can I find deals for flights from London to Seattle that include extra baggage allowance?

Accepted Answer

The amount of baggage you can bring on your London to Seattle flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

Question 22

Can I find deals on flights from London to Seattle with specific airlines?

Accepted Answer

Yes, Cheapflights allows you to browse and filter London to Seattle flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

Question 23

Can I find deals for flights from London to Seattle that include hotel bookings?

Accepted Answer

Yes. In addition to deals on London to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

Question 24

How can I find direct flights from London to Seattle?

Accepted Answer

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Seattle.

Question 25

Can I find deals for business class flights from London to Seattle?

Accepted Answer

Yes. Cheapflights offers flight deals from London to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Question 26

Can I find deals for flights from London to Seattle that allow pets onboard?

Accepted Answer

Many airlines flying from London to Seattle offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

Question 27

Can I find deals on last-minute flights from London to Seattle?

Accepted Answer

Yes, you can often find last-minute deals on London to Seattle flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

Question 28

How does Cheapflights help users find flights from London to Seattle?

Accepted Answer

Cheapflights helps you search for flights from London to Seattle via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Question 29

Why should you use Cheapflights to find cheap flight tickets from London to Seattle?

Accepted Answer

Cheapflights helps you find that perfect flight to Seattle from London by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Question 30

Can Cheapflights find flights from London to Seattle with no change fees?

Accepted Answer

Certainly. Search results for flights to Seattle from London shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Question 31

Can Cheapflights notify me if prices for flights from London to Seattle become cheaper?

Accepted Answer

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Seattle from London today and book when prices fit your budget.

Popular in	July
Cheapest in	November
Average price	$735
Round-trip from	$247

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest$505	Average$795	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Virgin Atlantic	Cheapest$537	Average$770	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
British Airways	Cheapest$542	Average$822	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Delta	Cheapest$574	Average$782	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
United Airlines	Cheapest$583	Average$654	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Finnair	Cheapest$611	Average$751	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
American Airlines	Cheapest$614	Average$762	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Iberia	Cheapest$618	Average$758	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
Aer Lingus	Cheapest$670	Average$831	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights

1%of flight departures	Early morningMidnight to 6 am
60%of flight departures	Morning6 am to noon
39%of flight departures	AfternoonNoon to 6 pm
0%of flight departures	Evening6 pm to midnight

Sunday	20daily flights
Monday	20daily flights
Tuesday	24daily flights
Wednesday	20daily flights
Thursday	20daily flights
Friday	20daily flights
Saturday	25daily flights

Cheap flights from London (LON) to Seattle (SEA) from $261

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/22. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.

The best prices from London to Seattle/Tacoma Intl are usually found in November or February, booked 43 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from London to Seattle

Popular in

Cheapest in

Average price

Round-trip from

What is the cheapest day to fly round-trip from London to Seattle?

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

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

What is the cheapest time of day to fly from LON to SEA?

Cheap Finnair flights from London to Seattle

Take a peek at the cheapest Finnair flights we've detected traveling from London to Seattle. It's recommended that users confirm their flight details before booking.

Cheap British Airways flights from London to Seattle

To aid your search, here are some of the cheapest British Airways flights we've found from London to Seattle. Deals are refreshing constantly so come back soon for more options.

Cheap London to Seattle flights in May & June 2024

Find cheap flight options from London to Seattle specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,784,634 searches. Prices were last updated on May 30, 2024.

These are some of the most attractive deals on flights from London to Seattle in 2024. Check back soon for alternative fares.

London to Seattle 2024 flight deals

Discover exclusive flight deals for travel between London and Seattle in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.

These are some of the most attractive deals on flights from London to Seattle in 2024. Check back soon for alternative fares.

Non-stop flights to Seattle from London

If you're seeking options on non-stop flights from London to Seattle, check out these fares. Users can also choose from other London to Seattle flights by using the search form above.

London to Seattle flights leaving soon

Consider one of these great deals we found on last-minute flights from London to Seattle. Tip: verify your flight details before completing your reservation.

One-way flights to Seattle from London

Take a look at some of the best available options we've come across on one-way flights from London to Seattle. Those needing a return flight from London to Seattle can use the search form above.

Find flights from London to Seattle within your budget

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

Use this chart to determine the optimal time to book a round-trip flight from London to Seattle. Price data was last updated on May 24, 2024.

To ensure you get the cheapest price possible for a flight from London to Seattle, you should look to book at least 43 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Use this chart to determine the cheapest time to fly round-trip from London to Seattle. Price data was last updated on May 26, 2024.

Best time to book a flight from London to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from London with our price prediction graph.

Temperature and rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average temperature and rainfall totals by month.

Reviews of airlines servicing Seattle

Peruse reviews from past customers who have flown with Finnair, British Airways and American Airlines from London to Seattle to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from London to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly into for flights to Seattle from London?

Can I find flights from London to Seattle for under $600 on Cheapflights?

Are there nonstop flights from London to Seattle for under $600 on Cheapflights?

Are there last-minute flights available from London to Seattle for under $700?

What are the cheapest airlines flying from London to Seattle round-trip?

What are the most popular routes from London to Seattle?

What are the most reliable airlines from London to Seattle?

What are the cheapest flights from London to Seattle?

What does LHR to SEA mean?

Can I find deals for flights from London to Seattle that include extra baggage allowance?

Can I find deals on flights from London to Seattle with specific airlines?

Can I find deals for flights from London to Seattle that include hotel bookings?

How can I find direct flights from London to Seattle?

Can I find deals for business class flights from London to Seattle?

Can I find deals for flights from London to Seattle that allow pets onboard?

Can I find deals on last-minute flights from London to Seattle?

How recently were the London to Seattle flight deals updated?

What are the most popular airlines that fly from London to Seattle?

What is the cheapest month to book a flight from London to Seattle?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for London to SeattleSee prices for flight routes from nearby airports that may be better suited for you.

See prices for flight routes from nearby airports that may be better suited for you.

Top 9 airlines flying from London to Seattle

Popular flight searches

Check out other popular destinations found by fellow travelers in 2024

Search flights from London to Seattle by cabin class

Find flights from London to Seattle, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Hourly flight availability from London to Seattle

Find hourly flight availability from London to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 30, 2024.

Weekly flight availability from London to Seattle

Explore weekly flight availability from London to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated May 30, 2024.

Book a flight to one of these trending destinations

User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from London to Seattle?

Why should you use Cheapflights to find cheap flight tickets from London to Seattle?

Alternative routes for London to Seattle
See prices for flight routes from nearby airports that may be better suited for you.