Question 1

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

Accepted Answer

According to our current data, Icelandair (£365), WestJet (£435), and Lufthansa (£493) offers the cheapest pricing from London Heathrow Airport to Seattle. Icelandair is priced at 35% lower than the current average price of a flight leaving 3 months from now.

Question 2

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

Accepted Answer

The cheapest airline one-way is WestJet, with whom users have recently found tickets for as low as £272. However, be on the lookout for offers from Aer Lingus and Icelandair, as they are both options that can get you from London Heathrow Airport to Seattle for a low price.

Question 3

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

Accepted Answer

The best time to book flights from London Heathrow Airport to Seattle is 76 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Question 4

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

Accepted Answer

Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Seattle (average of £603). Flying from London Heathrow Airport to Seattle in July is currently the most expensive (average of £835). 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 Heathrow Airport to Seattle?

Accepted Answer

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

Question 6

Weekly flight availability from London Heathrow Airport to Seattle

Accepted Answer

The most flights from LHR to SEA are scheduled on a Monday (22 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (16 on average).

Question 7

E

Accepted Answer

In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 inches per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

Question 8

E

Accepted Answer

If weather is an important factor for your trip to Seattle, 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 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

Question 9

What are the cheapest flights from London Heathrow Airport to Seattle?

Accepted Answer

The cheapest flight price from London Heathrow Airport to Seattle is £442. On average you can expect to pay £2,022. The most popular route, (London Heathrow - Seattle/Tacoma Intl), can usually be booked for £380.

Question 10

What are the most reliable airlines from London Heathrow Airport to Seattle?

Accepted Answer

Consider KLM (71%), Air France (71%) or Delta (71%) when booking your flight. These represent the most reliable airlines when flying from London Heathrow Airport to Seattle.

Question 11

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

Accepted Answer

When booking a flight from London Heathrow Airport to Seattle, you may want to consider flying on Air Canada, Air France or Finnair as they are the most popular for this route.

Question 12

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

Accepted Answer

Users have found that flying from London Heathrow Airport to Seattle on a Saturday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

Question 13

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

Accepted Answer

Find a great deal and save up to 45% by booking at least 18 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from London Heathrow Airport to Seattle within the next two weeks, with the cheapest ticket starting at £533.

Question 14

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

Accepted Answer

Due to multiple factors, expect to potentially pay more when booking in August. For low rates, January can be a great choice for travel to Seattle. Flights to Seattle from London Heathrow Airport in January are about £561 on average during January, but can be found for as low as £382.

Question 15

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

Accepted Answer

It’s typically best to fly out from London Heathrow Airport to Seattle at midday. Doing so could potentially save you 9% on the flight price compared to flying in the afternoon, which is usually more expensive.

Question 16

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

Accepted Answer

If you book a flight to Seattle from London Heathrow, you will be flying to 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 20 flights from London Heathrow to Seattle/Tacoma Intl per day from 12 different airlines.

Question 17

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

Accepted Answer

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

Question 18

How can I find direct flights from Heathrow 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 Heathrow to Seattle.

Question 19

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

Accepted Answer

Yes. Cheapflights offers flight deals from Heathrow 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 20

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

Accepted Answer

Deals for Heathrow to Seattle flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Question 21

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

Accepted Answer

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

Question 22

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

Accepted Answer

Need flexible booking options for your flight to Seattle from Heathrow? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Question 23

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

Accepted Answer

Yes! Start tracking prices for Heathrow to Seattle flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

Round-trip from	£365
One-way from	£272
Popular in	July
Cheapest in	November

Cheap flights from London Heathrow Airport to Seattle from £272

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 23/1. Fares are subject to change and may not be available on all flights or dates of travel.

The best prices from London Heathrow to Seattle/Tacoma Intl are usually found in November or January, booked 76 days in advance, depart on a Wednesday or Friday and return on a Wednesday

Cheap flight deals from Heathrow to Seattle

Round-trip from

One-way from

Popular in

Cheapest in

Cheap Icelandair flights from Heathrow to Seattle

Take a peek at the cheapest Icelandair flights we've detected travelling from London to Seattle. Make sure to check back often as deals are often changing.

Cheap WestJet flights from Heathrow to Seattle

To aid your search, here are some of the cheapest WestJet flights we've found from London to Seattle. Deals frequently update to provide users with more options.

Cheap Heathrow to Seattle flights in October & November 2024

Find cheap flight options from Heathrow to Seattle specifically for the months of October and November 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 1,024,559 searches. Prices were last updated on 11 October 2024.

Scroll through some of the best deals on flights from London to Seattle in 2024. Check back soon for alternative fares.

Heathrow to Seattle 2024 flight deals

Discover exclusive flight deals for travel between Heathrow and Seattle in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 1,024,559 searches. Data last updated 11 October 2024.

Scroll through some of the best deals on flights from London to Seattle in 2024. Check back soon for alternative fares.

Direct flights to Seattle from Heathrow

Consider booking one of these non-stop flights heading from London to Seattle. If you're looking for other options for flights from London to Seattle, make sure to update the search form at the top of page.

Heathrow to Seattle flights leaving soon

Have a look at some of the flights available from London to Seattle departing last-minute. Users should examine the flight details to ensure there are no surprises.

One-way flights to Seattle from Heathrow

If you're seeking multiple options on one-way flights from London to Seattle, be sure to check out these deals, which are updated often. Those needing a return flight from London to Seattle can use the search form above.

Find flights from Heathrow to Seattle within your budget

Best time to book a flight from Heathrow to Seattle

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

Travel insights for flights from Heathrow to Seattle

Get recent, data-driven insights about flights from Heathrow to Seattle including ideal travel times, pricing trends, and more.

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

Use this chart to determine the optimal time to book a return flight from Heathrow to Seattle. Price data was last updated on 4 October 2024.

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

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

Find hourly flight availability from Heathrow 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 11 October 2024.

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

Use this chart to determine the cheapest time to fly return from Heathrow to Seattle. Price data was last updated on 6 October 2024.

Weekly flight availability from London Heathrow Airport to Seattle

Explore weekly flight availability from Heathrow 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 11 October 2024.

Rainfall in Seattle by month

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

Temperature in Seattle by month

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

Reviews of airlines servicing Seattle

Get a feel of what it's like to fly with Icelandair, WestJet and Lufthansa from London to Seattle by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.