£351 Cheap Flights from Seattle / Tacoma International (SEA) to London Gatwick (LGW)

Compare Seattle / Tacoma International to London Gatwick flight deals

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Flight deals from Seattle / Tacoma International to London Gatwick

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

London.£351 per passenger.Departing Sun, 1 Feb, returning Sun, 8 Feb.Return flight with Icelandair and Norwegian Air Sweden.Outbound indirect flight with Icelandair, departs from Seattle / Tacoma International on Sun, 1 Feb, arriving in London Gatwick.Inbound indirect flight with Norwegian Air Sweden, departs from London Gatwick on Sun, 8 Feb, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £351, select.

London.£362 per passenger.Departing Wed, 28 Jan, returning Thu, 5 Feb.Return flight with Icelandair and Norwegian Air Sweden.Outbound indirect flight with Icelandair, departs from Seattle / Tacoma International on Wed, 28 Jan, arriving in London Gatwick.Inbound indirect flight with Norwegian Air Sweden, departs from London Gatwick on Thu, 5 Feb, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £362, select.

London.£362 per passenger.Departing Fri, 30 Jan, returning Tue, 31 Mar.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from Seattle / Tacoma International on Fri, 30 Jan, arriving in London Gatwick.Inbound indirect flight with Icelandair, departs from London Gatwick on Tue, 31 Mar, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £362, select.

London.£370 per passenger.Departing Wed, 25 Feb, returning Tue, 3 Mar.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from Seattle / Tacoma International on Wed, 25 Feb, arriving in London Gatwick.Inbound indirect flight with Icelandair, departs from London Gatwick on Tue, 3 Mar, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £370, select.

London.£371 per passenger.Departing Sun, 11 Jan, returning Thu, 15 Jan.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from Seattle / Tacoma International on Sun, 11 Jan, arriving in London Gatwick.Inbound indirect flight with Icelandair, departs from London Gatwick on Thu, 15 Jan, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £371, select.

London.£372 per passenger.Departing Thu, 5 Mar, returning Wed, 18 Mar.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from Seattle / Tacoma International on Thu, 5 Mar, arriving in London Gatwick.Inbound indirect flight with Icelandair, departs from London Gatwick on Wed, 18 Mar, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £372, select.

London.£407 per passenger.Departing Mon, 6 Apr, returning Mon, 13 Apr.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from Seattle / Tacoma International on Mon, 6 Apr, arriving in London Gatwick.Inbound indirect flight with Icelandair, departs from London Gatwick on Mon, 13 Apr, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £407, select.

London.£410 per passenger.Departing Thu, 26 Feb, returning Mon, 11 May.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from Seattle / Tacoma International on Thu, 26 Feb, arriving in London Gatwick.Inbound indirect flight with Icelandair, departs from London Gatwick on Mon, 11 May, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £410, select.

Find the cheapest month to fly from Seattle / Tacoma International to London Gatwick

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

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Seattle / Tacoma International to London Gatwick: Alternative routes

Compare routes from Seattle / Tacoma International to London below. You may find an airport to fly into that's cheaper, faster, or easier than London Gatwick.

Seattle to London: Flight information

The things to know before you go.

Cheapest flight found	£351
Cheapest month to fly	February

Finding cheap flights from Seattle / Tacoma International to London Gatwick: Frequently asked questions

How much are return flights from Seattle / Tacoma International to London Gatwick?

The best price we found for a return flight from Seattle / Tacoma International to London Gatwick is £351. 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.

Which airlines fly direct from Seattle / Tacoma International to London Gatwick?

Currently, there are no airlines that fly direct from Seattle / Tacoma International to London Gatwick. But we found flights with one or more stops from £351.

How many flights are there a week from Seattle / Tacoma International to London Gatwick?

As of December 2025, there are no flights flying from Seattle / Tacoma International to London Gatwick.

When is the cheapest time to fly from Seattle / Tacoma International to London Gatwick?

The cheapest month to fly from Seattle / Tacoma International to London Gatwick is usually February.

Which upcoming date is cheapest to fly from Seattle / Tacoma International Airport to London Gatwick Airport on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Seattle / Tacoma International Airport to London Gatwick Airport on Sunday, 1 February 2026.

Can I get a direct flight from Seattle / Tacoma International Airport to London Gatwick Airport?

No airlines currently offer direct flights between Seattle / Tacoma International Airport and London Gatwick Airport. Most routes have one or more stops.

How can I find the best flight deal to London Gatwick?

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 Gatwick 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.

Which is the cheapest airline to fly from Seattle / Tacoma International Airport to London Gatwick with?

Currently, Icelandair offers the cheapest flight tickets to London Gatwick.

Flying from Seattle-Tacoma International Airport (SEA) to London Gatwick Airport (LGW): what you need to know

London is seven hours ahead of Seattle and observes the UTC+0 timezone.
Your SEA to LGW flight won't wait if you're late, so be at the airport on time. Arrive up to one hour in advance for domestic flights and two hours ahead when you're flying internationally.
Flying during a peak month such as July? School holidays and other popular seasons can lead to longer queues at airport checkpoints. Play things extra safe and arrive up to four hours ahead of an international flight and two hours before a domestic departure.
Consider adding a stopover when booking your ticket from Seattle-Tacoma International Airport to London Gatwick Airport. Just deselect 'Direct flights only' to break up your journey, or perhaps explore a new destination along the way. Here are some options between SEA and LGW:
- Vancouver International Airport
- Keflavik International Airport
- Amsterdam Airport Schiphol

How to find the cheapest flights from Seattle-Tacoma International Airport (SEA) to London Gatwick Airport (LGW)

Currently, £172 is the cheapest price we've seen for a one-way Seattle-Tacoma International Airport to London Gatwick Airport flight. The best price for a return ticket is £351. Bear in mind that fares could change due to demand at the time of booking.
It's usually best to book ahead of time if you want to get cheap tickets from SEA to LGW. That's because flight prices are based on demand, which tends to increase closer to the date of departure.
Getting cheap flights from Seattle-Tacoma International Airport to London Gatwick Airport is more likely if you can be flexible with your travel plans. Use the 'Whole month' search tool to see the lowest fares across the month and bag a great deal.
Save time looking for cheap flights from SEA to LGW by setting up a Price Alert. You'll get an email or notification on the app when a lower fare pops up.
Choose your preferred arrival and departure times, airlines and number of stops with the filters. Alternatively, sort your results by 'Cheapest' to find the best deals on flights from Seattle-Tacoma International Airport to London Gatwick Airport.

Handy information about Seattle-Tacoma International Airport (SEA)

Seattle-Tacoma International Airport gets top marks for its on-time performance. 81.27% of flights that take off from SEA reach their destination without delay.
Seattle-Tacoma International Airport is about 14 miles from central Seattle. If you're driving, ride-sharing or catching a cab from the centre, it'll take you 20 minutes or so to get there, depending on the traffic.
Planning to take public transport? You can expect a journey time of around 55 minutes.
Searching for a handy hotel near SEA? If you're catching an early flight from Seattle-Tacoma International Airport to London Gatwick Airport, these stays will have you sleeping moments from your departure lounge:

Arriving at London Gatwick Airport (LGW)

If you have a late Seattle-Tacoma International Airport to London Gatwick Airport flight, few things top the convenience of staying close to the terminal. Grab your bags from the carousel and then be showered and snoozing shortly after at one of these accommodation options near LGW:
Begin your adventure by picking up a London Gatwick Airport rental car. Grab your wheels from Green Motion, U-Save or Drivalia and explore beyond London's main sights.
Get the best deal by booking your vehicle from London Gatwick Airport around three weeks ahead of your trip.

Getting from London Gatwick Airport (LGW) to central London

London Gatwick Airport to the centre of London has a drive time of about 1 hour 20 minutes. It's approximately 50 miles away.
It'll take around 1 hour 25 minutes to get there by public transport.

When to fly to London Gatwick Airport (LGW)

It's time to plan your dates for your flight from Seattle-Tacoma International Airport to London Gatwick Airport. August is the busiest month to head to London. If you like a more relaxed vibe, go in January.
Book your flight from Seattle-Tacoma International Airport to London Gatwick Airport for July if you'd like to go to London during its warmest month. Expect temperatures of between 11ºC (52ºF) and 26ºC (79ºF).
January has average temperatures of between 0ºC (32ºF) and 9ºC (48ºF). Search for cheap tickets from SEA to LGW around that time if you like cooler conditions.

Explore more of United Kingdom

London has loads to offer, but there are so many other parts of United Kingdom just waiting to be explored. About 100 miles north-west of London, a visit to Birmingham will keep your itinerary busy. Start with attractions like Cadbury World, The Library of Birmingham and National Sea Life Centre.
Bristol is another must-experience destination in United Kingdom and is around 110 miles west of London. No trip is complete without seeing Clifton Suspension Bridge, Cabot Tower and Brandon Hill Nature Park.