Question 1

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

Accepted Answer

Cheapflights users have booked flights from Seattle to London round-trip from $618. Other airlines that can offer you cheap pricing are SWISS, from $619, and British Airways, from $621. Users have found that KLM is 24% cheaper than the other options available to this destination.

Question 2

What are the cheapest airlines to fly from Seattle to London one-way?

Accepted Answer

One-way options have recently been found by users for as low as $262 on Icelandair. Other airlines that offer cheap prices include WestJet from $269 and Iberia from $353 one-way.

Question 3

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

Accepted Answer

Booking 7 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to London. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Question 4

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

Accepted Answer

Currently, November is the cheapest month in which you can book a flight from Seattle to London (average of $661). Flying from Seattle to London in June is currently the most expensive (average of $1,088). 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 Seattle to London?

Accepted Answer

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

Question 6

Weekly flight availability from Seattle to London

Accepted Answer

The most flights from SEA to LON are scheduled on a Wednesday (16 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (12 on average).

Question 7

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Accepted Answer

In terms of precipitation, rainfall in London ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London when rainfall is around 1.6 in.

Question 8

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Accepted Answer

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

Question 9

What are the most popular routes from Seattle to London?

Accepted Answer

When deciding which route to take from Seattle to London consider Seattle/Tacoma Intl - London Heathrow, Seattle/Tacoma Intl - London Gatwick or Seattle/Tacoma Intl - London City as they are the most popular.

Question 10

What are the cheapest flights from Seattle to London?

Accepted Answer

Looking at all options, your cheapest flight can be booked for $407. While the most popular route (Seattle/Tacoma Intl - London Heathrow) can be booked for $509 on average our data indicates $1,785 when flying from Seattle to London.

Question 11

What are the most reliable airlines from Seattle to London?

Accepted Answer

Consider KLM (85%), Air France (85%) or Delta (84%) when booking your flight. These represent the most reliable airlines when flying from Seattle to London.

Question 12

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

Accepted Answer

Before booking your flight from Seattle to London check out the most popular airlines for this route: American Airlines, Air Canada or Air France.

Question 13

Where are the most common layover locations when flying from Seattle to London?

Accepted Answer

The most popular layover on flights from Seattle to London is Reykjavik.

Question 14

Where are the least popular layover locations for Seattle to London flights?

Accepted Answer

Flights departing from Seattle and landing in London layover in Dublin least frequently.

Question 15

What are some popular things to do or see while on a layover in Reykjavik?

Accepted Answer

Reykjavik travelers tend to visit Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool more than anywhere else. Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool are located about 23.2 mi, 23.3 mi, and 24.6 mi, respectively from Reykjavik Keflavik Intl. Travelers in need of a car in Reykjavik can rent one for about $49 per day.

Question 16

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

Accepted Answer

Wednesday flights are found to be more expensive to fly from Seattle to London. 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 London.

Question 17

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

Accepted Answer

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 8 days in advance, which can save you up to 44% on flights from Seattle to London compared to booking the week you need them. Waiting 8 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $658. For sooner than that we have options available in the next 3 days from $951.

Question 18

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

Accepted Answer

October is one of the best times of the year to fly to London from Seattle. Prices for October average $815 per person but you can even find prices for as low as $551. The most expensive prices can be found in the month of June. Opting for a October flight can save you 46% on your journey compared to booking in June

Question 19

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

Accepted Answer

One of the essential ways to save on airfare from Seattle to London is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 19% on airfare.

Question 20

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Accepted Answer

Most accurate provider: When it comes to deals on Seattle-London flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-London flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-London flight searches over the past month and is updated monthly.

Question 21

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Accepted Answer

Most trusted provider: When it comes to deals on Seattle-London flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-London flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Question 22

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

Accepted Answer

If you book a flight to London from Seattle, you will be flying from Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle. There are 13 flights from Seattle/Tacoma Intl to London per day from 15 different airlines.

Question 23

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

Accepted Answer

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

Question 24

How can I find direct flights from Seattle to London?

Accepted Answer

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

Question 25

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

Accepted Answer

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

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Popular in	June
Cheapest in	October
Round-trip from	$618 (Ticket)
One-way from	$262 (Mytrip)

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 12/9. Fares are subject to change and may not be available on all flights or dates of travel.

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The best prices from Seattle/Tacoma Intl to London are usually found in October or January, booked 7 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

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Find flight deals from Seattle to London

Cheapest flights from Seattle to London
Explore the most affordable flight options available from Seattle to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 5, 2024.

Explore the most affordable flight options available from Seattle to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 5, 2024.

Best flights from Seattle to London
Discover carefully curated flight deals from Seattle to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 5, 2024.

Discover carefully curated flight deals from Seattle to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 5, 2024.

Last-minute flights from Seattle to London
Discover last-minute flight deals from Seattle to London. Data last updated December 5, 2024 and is based on user searches.

Discover last-minute flight deals from Seattle to London. Data last updated December 5, 2024 and is based on user searches.

One-way flights from Seattle to London
Search for one-way flight options from Seattle to London. Find affordable one-way fares based on user searches. Data last updated December 5, 2024.

Search for one-way flight options from Seattle to London. Find affordable one-way fares based on user searches. Data last updated December 5, 2024.

Find flights from Seattle to London within your budget

$262+ Cheap flights from Seattle (SEA) to London (LON)