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 £379. Other airlines that can offer you cheap pricing are British Airways, from £389, and Iberia, from £397. Icelandair is currently priced 39% below the average price you’ll pay for this route.

Question 2

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

Accepted Answer

The cheapest airline one-way is Icelandair, with whom users have recently found tickets for as low as £150. However, be on the lookout for offers from WestJet and Air Canada, as they are both options that can get you from Seattle to London for a low price.

Question 3

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

Accepted Answer

The price you pay for your flight from Seattle to London may vary depending on when you book. For the best chance of a lower fare, look to book 7 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Question 4

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

Accepted Answer

Currently, February is the cheapest month in which you can book a flight from Seattle to London (average of £359). Flying from Seattle to London in June is currently the most expensive (average of £617). 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

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Accepted Answer

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

Question 6

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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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

Question 7

Weekly flight availability from Seattle to London

Accepted Answer

The most flights from SEA to LON 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 8

How recently were the Seattle to London flight deals updated?

Accepted Answer

The Seattle to London flight deals you see on this page were last updated on 13/9.

Question 9

What are the most popular routes from Seattle to London?

Accepted Answer

The most popular route from Seattle to London is Seattle/Tacoma Intl - London Heathrow. You may also consider Seattle/Tacoma Intl - London Gatwick or Seattle/Tacoma Intl - London City.

Question 10

What are the cheapest flights from Seattle to London?

Accepted Answer

The cheapest flight price from Seattle to London is £280. On average you can expect to pay £471. The most popular route, (Seattle/Tacoma Intl - London Heathrow), can usually be booked for £379.

Question 11

What are the most reliable airlines from Seattle to London?

Accepted Answer

No one likes to see their flight delayed. When booking a flight from Seattle to London consider choosing KLM (70%), Air France (70%) or Delta (70%) as they are the most reliable in getting you off to your destination on time.

Question 12

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

Accepted Answer

The most popular airlines flying from Seattle to London are Virgin Atlantic, British Airways and Icelandair. Something to consider prior to booking your flight.

Question 13

Are there nonstop flights from Seattle to London for under £400 on Cheapflights?

Accepted Answer

Cheapflights has at least 10 direct flights from Seattle to London under £400. A good price for a nonstop flight from Seattle to London is less than £529.

Question 14

Are there last-minute flights available from Seattle to London for under £500?

Accepted Answer

There are currently 20+ open flights from Seattle to London within the next 7 days for less than £500.

Question 15

Can I find flights from Seattle to London for under £400 on Cheapflights?

Accepted Answer

Yes, there are multiple flights from Seattle to London for under £400. The cheapest flight booked recently is on Multiple Airlines for just £344, but on average you can expect to pay £422.

Question 16

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

Accepted Answer

Flying to your destination on a Thursday can be more expensive, but this shouldn’t discourage you from finding affordable options to get to London. Check prices with Cheapflights to find a great deal for your trip.

Question 17

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

Accepted Answer

Travelers have found it’s best to book a flight 8 days in advance to save up to 44% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 8 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Seattle to London 1-2 weeks in advance for as low as £503, or £737 for flights within the next 24 hours.

Question 18

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

Accepted Answer

The best pricing can be found in the month of November. Prices to London from Seattle average £627. You can even find prices in November for less than £627, as users have found deals to London from as low as £403. The month of June appears to be one of the more expensive times to travel to London from Seattle. Flying in the targeted month can save you up to 46%.

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 at midday tend to be the most expensive. A flight in the morning could potentially save you up to 16% on airfare.

Question 20

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

Accepted Answer

Seattle/Tacoma Intl (SEA) is the airport you will fly out of if you book a flight from Seattle to London. You should not have trouble finding flights to London from Seattle/Tacoma Intl; the airport handles an average of 20 outbound flights to London per day. You should also have plenty of airline options to choose from since 4 airlines have flights from the Seattle airport to London. It is only a 11.4 mi journey to Seattle/Tacoma Intl (SEA) from Seattle’s city center.

Question 21

What does SEA to LHR mean?

Accepted Answer

These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Seattle/Tacoma Intl Airport to London Heathrow Airport flight would often be abbreviated as a SEA to LHR flight. While you’re still figuring out your travel plans, it’s not a bad idea to learn the names and codes of other airports around these areas: London Gatwick Airport (LGW), London Stansted Airport (STN), London Luton Airport (LTN), London City Airport (LCY), London Southend Airport (SEN).

Question 22

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 holiday packages that include both flights and hotel.

Question 23

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 24

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.

Question 25

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

Accepted Answer

Deals for Seattle to London 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 26

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

Accepted Answer

Cheapflights simply makes it quick and affordable to book flights from Seattle to London by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Question 27

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

Accepted Answer

Users can book flights with no change fees policies with our dedicated filters. Book flights from Seattle to London flexibly with Cheapflights today.

Question 28

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

Accepted Answer

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

Question 29

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

Accepted Answer

Yes, you can often find last-minute deals on Seattle to London 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 30

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

Accepted Answer

Many airlines flying from Seattle to London 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 31

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

Accepted Answer

The amount of baggage you can bring on your Seattle to London 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 32

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

Accepted Answer

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

Round-trip from	£344
One-way from	£119
Popular in	June
Cheapest in	November

Cheap flights from Seattle to London from £119

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 14/10. Fares are subject to change and may not be available on all flights or dates of travel.

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

Cheap flight deals from Seattle to London

Round-trip from

One-way from

Popular in

Cheapest in

Cheap Aer Lingus flights from Seattle to London

Find some of the cheapest Aer Lingus flights travelling from Seattle to London. Come back soon if you're not finding the exact deal you're looking for.

Cheap British Airways flights from Seattle to London

Have a look at some of the cheapest available British Airways flights departing from Seattle and landing in London. Check back soon if you're not seeing flights that suit your needs.

Cheap Seattle to London flights in September & October 2024

Find cheap flight options from Seattle to London specifically for the months of September and October 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 1,006,798 searches. Prices were last updated on 13 September 2024.

Listed are some of the best fares we've found on flights departing from Seattle to London in 2024. Check back regularly for other flight deals.

Seattle to London 2024 flight deals

Discover exclusive flight deals for travel between Seattle and London in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 1,006,798 searches. Data last updated 13 September 2024.

Listed are some of the best fares we've found on flights departing from Seattle to London in 2024. Check back regularly for other flight deals.

Direct flights to London from Seattle

Consider booking one of these non-stop flights heading from Seattle to London. Those looking to potentially save on 1 or 2-stop flights from Seattle to London should utilise the search form at the top of the page.

Seattle to London flights leaving soon

Consider one of these great deals we found on last-minute flights from Seattle to London. Users should be sure to double check the price, date, and time of their last-minute flight.

One-way flights to London from Seattle

Take a look at some of the best available options we've come across on one-way flights from Seattle to London. For those needing a return trip from Seattle, there is a search form available above.

Find flights from Seattle to London within your budget

Best time to book a flight from Seattle to London

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

Travel insights for flights from Seattle to London

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

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

Use this chart to determine the optimal time to book a return flight from Seattle to London. Price data was last updated on 6 September 2024.

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

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

Find hourly flight availability from Seattle to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 13 September 2024.

Weekly flight availability from Seattle to London

Explore weekly flight availability from Seattle to London. 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 13 September 2024.

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

Our users search for these airlines the most often when looking for flights from Seattle to London. Data last updated on 13 September 2024.

Rainfall in London by month

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

Temperature in London by month

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

Reviews of airlines servicing London

Read through reviews of airlines operating flights from Seattle to London, such as Aer Lingus, British Airways and Virgin Atlantic. 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 Seattle to London. 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 from for flights from Seattle to London?