Cheap flights from London to Seattle

from as little as £507

3 nights in Seattle, departing London Gatwick on 21 / Oct / 2024 with Icelandair (price found 19 hours ago)

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The London / Seattle route

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Seattle flight facts

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Today alone, Netflights has searched over 33,451 flights. 21 / Oct / 2024 is currently the lowest priced day of the year to fly the London/Seattle route. There are around 2,621 flights on any given week from the UK to Seattle and the cheapest month to fly right now is October.

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Min / Max Temperature (°C)

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25 °C

Rainfall (mm)

21 mm


81 mm


170 mm

Key facts about Seattle

How to get cheap flights from London to Seattle

Tips and advice from our flight experts

There are around 2,621 weekly flights from London to Seattle – so if you’re planning a visit to this US city, it’s worth spending some time searching for a cheap flight. The good news is, there are loads of low-cost options on this route. Flights from London to Seattle land at Seattle-Tacoma International Airport (SEA), which is also known as Sea-Tac, but you’ve got three London airports to take your pick from back in the UK.

If you go from London Gatwick (LGW), you can fly direct to Seattle with Norwegian Air, who regularly offer some of the cheapest flights on this route. There are indirect flights from this airport, too, which could save you some extra cash.

Fly from London Heathrow (LHR), meanwhile, and you’ve got even more choice. Direct flights are available with British Airways, Virgin Atlantic, Finnair and more, which makes this the most popular departure airport in the city. Or, if you go from London City Airport (LCY), you can fly with carriers including SWISS – just bear in mind all flights from this airport will include at least one stopover.

Of course, when you fly is just as important as where you fly from, so always compare flight prices either side of your preferred travel dates. If you’re pretty flexible, you could fly in May when prices are generally cheaper – it’s off-season season, so accommodation is likely to be cheaper, too. July, meanwhile, is the height of the summer tourist season here, making it one of the most expensive times to fly to Seattle.

FAQs about flights from London to Seattle

Which airlines fly from London to Seattle?
You can fly from London Heathrow to Seattle with carriers including Finnair, KLM, British Airways, Virgin Atlantic and Air France, as well as several others. From Gatwick you can fly direct with Norwegian Air, or indirect with several airlines including Aer Lingus and WestJet. From London City, you can fly indirect with SWISS.

Which airlines have the cheapest flights to Seattle?
For the cheapest flights to Seattle, try Norwegian Air or Finnair.

Can I fly direct from London to Seattle?
Yes – you can fly direct from London Gatwick with Norwegian Air, or from Heathrow with airlines including British Airways, Virgin Atlantic, Air France, KLM and Finnair.

Which London airport offers the cheapest direct flight to Seattle?
London Gatwick offers the cheapest direct flight to Seattle, but it’s also worth checking London Heathrow.

How long is the flight from London to Seattle?
The shortest flight duration from London to Seattle is around 9 hours and 40 minutes.

How do I get into Seattle from Seattle-Tacoma International Airport?
If you’re using public transport, you can take the Light Link train – it takes about 40 minutes from Sea-Tac Airport to Westlake Station in downtown Seattle and fares start at $2.25. Or, you can by an ORCA card – an all-day regional transit pass – for $8 and use public transport for 24 hours. If you’re taking a taxi from the airport to downtown Seattle, fares start from around $40 and you can pre-book at the travellers’ information boards in baggage claim. If you’re renting a car, take the shuttle bus to the rental centre – these leave from outside baggage claim at the north and south ends of the main terminal.

What are the top things to do in Seattle?
Washington’s biggest city has plenty up its sleeve when it comes to things to do, starting with the Space Needle. This huge observation tower lets you float over the city thanks to a rotating glass floor and tilting glass walls, so it’s not for the faint-hearted. Once you’ve ticked that off your bucket list, wander through Chihuly Garden and Glass, eat your way around Pike Place Market, and pay a visit to Pioneer Square.

Do I need a visa to travel to Seattle?
Most British passport holders can get an Electronic System for Travel Authorisation (ESTA) through America’s Visa Waiver Programme, which allows you to visit the USA for up to 90 days. Make sure you check if you’re eligible and get the relevant documentation prepared before you travel.

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