How many airports are there in London?

There are 6 airports in London: London City, London Heathrow, London Gatwick, London Luton, London Stansted, and London Southend.

How much are return flights from Seattle to London?

The best price we found for a return flight from Seattle to London is £442. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

How long does it take to fly from Seattle to London?

9 hours and 25 minutes is the average flight time from Seattle to London.

Which airlines fly direct from Seattle to London?

KLM, Iberia and Delta fly direct from Seattle to London.

How many flights are there a week from Seattle to London?

As of May 2024, there are 1,395 flights per week flying from Seattle to London.

When is the cheapest time to fly from Seattle to London?

The cheapest month to fly from Seattle to London is usually October.

Which is the cheapest airport to fly into in London?

If you're flying from Seattle, the cheapest airport near London is London Heathrow – which is 14.2 miles away from the centre of London. We've found flights into this airport from £442 .

Which upcoming date is cheapest to fly from Seattle to London on?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Seattle to London on Tuesday, 8 October 2024 .

Can I get a direct flight from Seattle to London?

Yes – the average flight time is 9 hours and 25 minutes.

How can I get the best flight deal from Seattle to London?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to London but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to London?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to London is around 40 days in advance, so don’t leave your flight to the last minute.

What’s the weather like in London?

In May, the average temperature is usually around 12°C. August is typically the warmest month in London, when it usually averages around 22°C. You can expect the least rain in March. The coldest month is January, with temperatures averaging 1°C. The rainiest month is October.

Which is the cheapest airline to fly from Seattle to London with?

The cheapest airline that flies to London is Icelandair. And the cheapest airline that flies to London Heathrow Airport is Air France.

Cheap Flights from Seattle to London from £442 Return

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Flight deals from Seattle to London

Looking for a cheap last-minute deal or the best return flight from Seattle to London? Find the lowest prices on one-way and return tickets right here.

London.£442 per passenger.Departing Tue, 8 Oct, returning Thu, 17 Oct.Return flight with Icelandair and Norse Atlantic Airways (UK).Outbound indirect flight with Icelandair, departs from Seattle / Tacoma International on Tue, 8 Oct, arriving in London Heathrow.Inbound indirect flight with Norse Atlantic Airways (UK), departs from London Gatwick on Thu, 17 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £442, select.

London.£464 per passenger.Departing Mon, 10 Feb, returning Mon, 24 Feb.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from Seattle / Tacoma International on Mon, 10 Feb, arriving in London Heathrow.Inbound indirect flight with Icelandair, departs from London Heathrow on Mon, 24 Feb, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £464, select.

London.£470 per passenger.Departing Mon, 27 May, returning Mon, 3 Jun.Return flight with WestJet and easyJet.Outbound indirect flight with WestJet, departs from Seattle / Tacoma International on Mon, 27 May, arriving in London Stansted.Inbound indirect flight with easyJet, departs from London Luton on Mon, 3 Jun, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £470, select.

London.£499 per passenger.Departing Mon, 27 May, returning Fri, 31 May.Return flight with WestJet and easyJet.Outbound indirect flight with WestJet, departs from Seattle / Tacoma International on Mon, 27 May, arriving in London Stansted.Inbound indirect flight with easyJet, departs from London Luton on Fri, 31 May, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £499, select.

London.£500 per passenger.Departing Tue, 8 Oct, returning Fri, 1 Nov.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from Seattle / Tacoma International on Tue, 8 Oct, arriving in London Gatwick.Inbound indirect flight with Icelandair, departs from London Gatwick on Fri, 1 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £500, select.

London.£503 per passenger.Departing Fri, 15 Nov, returning Tue, 19 Nov.Return flight with Alaska Airlines and Norse Atlantic Airways (UK).Outbound indirect flight with Alaska Airlines, departs from Seattle / Tacoma International on Fri, 15 Nov, arriving in London Gatwick.Inbound indirect flight with Norse Atlantic Airways (UK), departs from London Gatwick on Tue, 19 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £503, select.

London.£503 per passenger.Departing Tue, 10 Dec, returning Wed, 8 Jan.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from Seattle / Tacoma International on Tue, 10 Dec, arriving in London Gatwick.Inbound indirect flight with Icelandair, departs from London Gatwick on Wed, 8 Jan, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £503, select.

London.£505 per passenger.Departing Wed, 13 Nov, returning Fri, 21 Mar.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from Seattle / Tacoma International on Wed, 13 Nov, arriving in London Heathrow.Inbound indirect flight with Icelandair, departs from London Heathrow on Fri, 21 Mar, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £505, select.

Stay one step ahead. Find the best value travel with the latest deals, tips and news.

Find the cheapest month to fly from Seattle to London

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Seattle to London flights are currently cheapest in October.

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Direct flights from Seattle to London

Alternative Seattle to London routes

Looking for the cheapest, fastest or easiest route from Seattle to London? You could fly into the following airports instead.

Seattle to London: Flight information

The things to know before you go.

Cheapest flight found	£442
Cheapest month to fly	October
Average flight time	9 hrs, 25 mins
Most popular airline	KLM
Average flights per week	155

Finding cheap flights from Seattle to London: Frequently asked questions

: There are 6 airports in London: London City, London Heathrow, London Gatwick, London Luton, London Stansted, and London Southend.
: The best price we found for a return flight from Seattle to London is £442. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
: 9 hours and 25 minutes is the average flight time from Seattle to London.
: KLM, Iberia and Delta fly direct from Seattle to London.
: As of May 2024, there are 1,395 flights per week flying from Seattle to London.
: The cheapest month to fly from Seattle to London is usually October.
: If you're flying from Seattle, the cheapest airport near London is London Heathrow – which is 14.2 miles away from the centre of London. We've found flights into this airport from £442.
: After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Seattle to London on Tuesday, 8 October 2024.
: Yes – the average flight time is 9 hours and 25 minutes.
: We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to London but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
: We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to London is around 40 days in advance, so don’t leave your flight to the last minute.
: In May, the average temperature is usually around 12°C. August is typically the warmest month in London, when it usually averages around 22°C. You can expect the least rain in March. The coldest month is January, with temperatures averaging 1°C. The rainiest month is October.
: The cheapest airline that flies to London is Icelandair. And the cheapest airline that flies to London Heathrow Airport is Air France.

Flight Information

With many routes available several times a day, it’s easy to locate cheap flights from Seattle to London. Direct flights are available on FinnAir, Virgin Atlantic, Delta, British Airways, American Airlines and Aer Lingus.

International travellers flying from Seattle-Tacoma International Airport (SEA) should plan on arriving at the main entrance at least three hours before departure. Be sure to bring a current passport and any other qualifying documents. To get from the main terminal to the South Satellite within the airport, you’ll use the Satellite Transit System (STS), which is one of the oldest people movers in the United States.

If you arrive early enough, you can grab a bite to eat at the Seattle Taproom or stop and get a cup of coffee at Starbucks. For reading material on the flight, look through the best sellers at Hudson Booksellers.

Direct and indirect flights from Seattle to London land at Terminal 5 at London Heathrow Airport (LHR) although flights with one or more stops also land at London Gatwick Airport (LGW). Inside Heathrow, you’ll find free Wi-Fi, the Gordon Ramsay restaurant, and a variety of shops, including Gucci, Fortnum & Mason, and Louis Vuitton.

Upon arrival on flights from Seattle to Heathrow, go to immigration and passport control and proceed through border protection. Travel between the terminals is possible via trains, buses, or a short walk.

Climate and Time Differences

Travellers from Seattle to London both share very similar climates. Summer highs are around 25°C for both cities. Since both cities also experience a lot of rain, travellers should also be sure to pack an umbrella. August is usually the hottest month in London. On the other hand, January is the coolest, with daytime highs around 8°C. In the winter, snow is rare, and temperatures are usually mild enough for sightseeing.

London is eight hours ahead of Seattle. When arriving on cheap flights from Seattle to London, be sure to set your watch to ensure you meet appointments and arrive for dinner reservations on time.

Traveling and Dining in London

London offers a large transportation network for travellers from Seattle to London. Popular double-decker buses are a quick and inexpensive way to move around the city. They also offer sightseeing trips. The London Underground rail network, or The Tube, is one of the most popular methods of travel for locals. This network of trains takes you to and from the city centre quickly and efficiently. If you plan on travelling outside of the city, London’s Overground train network lets you go beyond The Tube. There’s also the option of metered cabs, or you can rent a bike if you prefer to explore the city quickly and get some exercise. There are car rental options available as well.

The cost of a meal in London is approximately 50 percent more expensive, especially if you're staying in central areas. Travel to outside residential neighbourhoods to save money. Choose from local favourites like bangers and mash, a popular sausage and mashed potato dish, or kippers, which is cured herring.

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