Cheap Flights from London to Seattle

Compare London to Seattle flight deals

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Flight deals from London to Seattle

Looking for a cheap last-minute deal or the best return flight from London to Seattle? If you want to travel next month, return fares start from Rs116,321. Find the lowest prices on one-way and return tickets right here.

Seattle.Rs84,970 per passenger.Departing Sat, 25 Apr.One-way flight with Ryanair.Outbound indirect flight with Ryanair, departs from London Stansted on Sat, 25 Apr, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs84,970, select.

Seattle.Rs85,624 per passenger.Departing Thu, 5 Mar.One-way flight with Ryanair.Outbound indirect flight with Ryanair, departs from London Stansted on Thu, 5 Mar, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs85,624, select.

Seattle.Rs102,953 per passenger.Departing Sun, 31 May.One-way flight with Ryanair.Outbound indirect flight with Ryanair, departs from London Stansted on Sun, 31 May, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs102,953, select.

Seattle.Rs105,036 per passenger.Departing Wed, 3 Jun.One-way flight with Ryanair.Outbound indirect flight with Ryanair, departs from London Stansted on Wed, 3 Jun, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs105,036, select.

Seattle.Rs105,743 per passenger.Departing Fri, 4 Sep.One-way flight with Ryanair.Outbound indirect flight with Ryanair, departs from London Stansted on Fri, 4 Sep, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs105,743, select.

Seattle.Rs106,797 per passenger.Departing Sun, 15 Nov.One-way flight with Ryanair.Outbound indirect flight with Ryanair, departs from London Stansted on Sun, 15 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs106,797, select.

Seattle.Rs107,046 per passenger.Departing Thu, 26 Feb.One-way flight with Norse Atlantic Airways (UK).Outbound indirect flight with Norse Atlantic Airways (UK), departs from London Gatwick on Thu, 26 Feb, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs107,046, select.

Seattle.Rs119,045 per passenger.Departing Tue, 25 Aug.One-way flight with Ryanair.Outbound indirect flight with Ryanair, departs from London Stansted on Tue, 25 Aug, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs119,045, select.

Seattle.Rs125,281 per passenger.Departing Fri, 9 Oct.One-way flight with FlyOne (Romania).Outbound indirect flight with FlyOne (Romania), departs from London Luton on Fri, 9 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs125,281, select.

Seattle.Rs127,885 per passenger.Departing Tue, 1 Dec.One-way flight with Ryanair.Outbound indirect flight with Ryanair, departs from London Stansted on Tue, 1 Dec, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs127,885, select.

Seattle.Rs142,680 per passenger.Departing Fri, 10 Jul.One-way flight with Animawings.Outbound indirect flight with Animawings, departs from London Gatwick on Fri, 10 Jul, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs142,680, select.

Seattle.Rs145,456 per passenger.Departing Wed, 2 Sep.One-way flight with Finnair.Outbound direct flight with Finnair departs from London Heathrow on Wed, 2 Sep, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs145,456, select.

Seattle.Rs145,838 per passenger.Departing Wed, 7 Oct.One-way flight with Finnair.Outbound direct flight with Finnair departs from London Heathrow on Wed, 7 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs145,838, select.

Seattle.Rs145,874 per passenger.Departing Wed, 4 Nov.One-way flight with Finnair.Outbound direct flight with Finnair departs from London Heathrow on Wed, 4 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs145,874, select.

Seattle.Rs145,941 per passenger.Departing Mon, 11 May.One-way flight with Finnair.Outbound direct flight with Finnair departs from London Heathrow on Mon, 11 May, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs145,941, select.

Seattle.Rs145,941 per passenger.Departing Tue, 8 Dec.One-way flight with Finnair.Outbound direct flight with Finnair departs from London Heathrow on Tue, 8 Dec, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs145,941, select.

Find the cheapest month to fly from London to Seattle

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

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Direct flights from London to Seattle

Alternative London to Seattle routes

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

London to Seattle: Flight information

The things to know before you go.

Cheapest flight found	Rs84,970
Cheapest month to fly	April
Average flight time	10 hrs, 11 mins
Most popular airline	KLM
Average flights per week	185

Finding cheap flights from London to Seattle: Frequently asked questions

How many airports are there in Seattle?

There are 4 airports in Seattle: Seattle Lake Union SPB, Seattle Boeing Fld, Seattle / Tacoma International, and Paine Field.

How much are return flights from London to Seattle?

The best price we found for a return flight from London to Seattle is Rs116,321. 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 London to Seattle?

10 hours and 11 minutes is the average flight time from London to Seattle.

Which airlines fly direct from London to Seattle?

KLM, Air France and Alaska Airlines fly direct from London to Seattle.

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

As of February 2026, there are 185 flights per week flying from London to Seattle.

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

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

Which is the cheapest airport to fly into in Seattle?

If you're flying from London, the cheapest airport near Seattle is Seattle / Tacoma International – which is 19.5 km away from the centre of Seattle. We've found flights into this airport from Rs116,321.

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

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from London to Seattle on Saturday, 7 February 2026.

Can I get a direct flight from London to Seattle?

Yes – the average flight time is 10 hours and 11 minutes.

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

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 Seattle 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 Seattle?

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

What’s the weather like in Seattle?

In February, the average temperature is usually around 4°C. August is typically the warmest month in Seattle, when it usually averages around 23°C. You can expect the least rain in July. The coldest month is December, with temperatures averaging 0°C. The rainiest month is November.

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

The cheapest airline that flies to Seattle is Icelandair. And the cheapest airline that flies to Seattle Boeing Fld Airport is British Airways.

Flying from London to Seattle: what you need to know

Take your pick of numerous airports when organising your flight from London to Seattle. Check out your options for leaving London from London Heathrow Airport (LHR), London Gatwick Airport (LGW) or Stansted Airport (STN). London Luton Airport (LTN) and London City Airport (LCY) also service London.
Seattle-Tacoma International Airport (SEA) and Lake Union Sea Plane Base Airport (LKE) are Seattle's major gateways.
Around 10 hours 10 minutes is how long you'll be travelling on a direct London to Seattle flight.
The timezone in Seattle is UTC-7, which is seven hours behind London.
With 26 weekly flights between the two airports, London Heathrow Airport (LHR) to Seattle-Tacoma International Airport (SEA) is the most popular route. Board the earliest flight from London to Seattle with British Airways at 09:25. If you'd like to make the most of your day before flying, the last departure from LHR to SEA is with Delta Air Lines at 18:30.
Give yourself enough time to make your London to Seattle flight. As a general rule, turn up two hours before international departures and an hour ahead for domestic flights.
You'll likely experience bigger queues during popular months like July. Arriving up to four hours ahead of international flights and two hours for a domestic departure is a smart move.

How to find the cheapest flights from London to Seattle

Get cheap London to Seattle flights by booking two months ahead. Based on our research, that's the ideal time for finding the biggest deals.
May is the best month for nabbing an incredible deal on a plane ticket from London to Seattle. If you want to travel at a different time of year, the 'Whole month' tool will show you the lowest prices for each month.
Getting a cheap flight from London to Seattle is a piece of cake with Price Alerts. Simply set up one of these automatic alerts and we'll let you know when the price has dropped.
Select your preferred departure and arrival times, number of stops and airlines by using the filters. Alternatively, sort your London to Seattle flight results by 'Fastest,' 'Cheapest' or 'Best.'

Flying from London

London Heathrow Airport (LHR)

Depart from London Heathrow Airport (LHR) on a nonstop flight from London to Seattle. From LHR, you can land directly at Seattle-Tacoma International Airport (SEA).
Leading airlines that offer direct London to Seattle plane tickets departing from LHR include:
We make it a breeze to book a London to Seattle flight with a stopover. To see all your options leaving from London Heathrow Airport, uncheck 'Direct flights only.' Next, choose a flight offering a stop long enough to see the sights of the city of your choice. Some popular stopovers include:
- Charles de Gaulle Airport (CDG)
- Vancouver International Airport (YVR)
- Keflavik International Airport (KEF)
LHR is around 26 kilometres from central London. If you're catching a cab, driving or ride-sharing from the centre, it'll take 55 minutes or so to get there, depending on the traffic. If you're using public transport, expect the travel time to be around 1 hour.
Have an early flight from London to Seattle? Avoid rushing to the airport (and enjoy a little extra shut-eye) by choosing one of these stays close to London Heathrow Airport:
68.18% of flights that leave from London Heathrow Airport make it to their destination on schedule.

London Gatwick Airport (LGW)

Get the most out of your holiday with a stopover on your London to Seattle flight. Visit friends or family or tick a new city off your list. Whatever you'd like to do, check out these stops between London Gatwick Airport and Seattle:
- Charles de Gaulle Airport (CDG)
- Vancouver International Airport (YVR)
- Keflavik International Airport (KEF)
LGW is about 40 kilometres from central London. It takes 1 hour 20 minutes or so to get to the airport by car from the city centre. Public transport takes roughly 30 minutes.
You're off on holiday, so why not spend an extra night away from home? Consider checking in to one of these accommodation options near London Gatwick Airport the day before your flight from London to Seattle:
When it comes to flight punctuality, London Gatwick Airport has an on-time arrival performance of 69%.

Stansted Airport (STN)

You can book a ticket from London to Seattle with one or more stops leaving from Stansted Airport (STN). These are some of the most common stopovers between STN and Seattle:
- Amsterdam Airport Schiphol (AMS)
- Dublin Airport (DUB)
- Keflavik International Airport (KEF)
From central London, STN is around 48 kilometres away. It takes roughly 1 hour to reach the airport by car and 1 hour 25 minutes or so if you use public transport.
Make taking an early London to Seattle flight the easiest part of your trip. Book a room at one of these accommodation options near Stansted Airport and get to your boarding gate without rushing:
Airports have an on-time performance rating that monitors how often flights touch down when they should. At STN, that rate is 64.73%.

Arriving in Seattle

Seattle-Tacoma International Airport (SEA)

Seattle-Tacoma International Airport (SEA) to central Seattle takes about 20 minutes by car. The centre is roughly 19 kilometres away.
Getting there on public transport will take you roughly 55 minutes.
The last thing you want is a lengthy journey to your hotel if you're landing late on a flight from London to Seattle. Book one of these accommodation options near SEA instead:
Get your adventure underway by picking up a Seattle-Tacoma International Airport rental car. Grab your wheels from Thrifty, Europcar or Budget and explore beyond Seattle's usual tourist stops.
To get the lowest price, book your vehicle from Seattle-Tacoma International Airport around one week ahead of your London to Seattle flight.

Lake Union Sea Plane Base Airport (LKE)

The centre of Seattle is approximately 3 kilometres from Lake Union Sea Plane Base Airport (LKE). As soon as your flight from London to Seattle has touched down and you've made your way out of the airport, expect a drive of about 10 minutes.
Travelling by public transport will take about 25 minutes.
After your flight from London to Seattle, rest your head at a hotel near LKE. These are some comfortable accommodation options that'll help you slip into relaxation mode:

Best time to go to Seattle

It's time to pick your dates for your flight from London to Seattle. July is the most popular month to travel to Seattle. If you want a more relaxed vibe, go in May.
The warmest month in Seattle is August, with temperatures ranging between 12ºC and 28ºC. Lock in your London to Seattle ticket then if this is the type of weather you enjoy.
Search for cheap flights from London to Seattle in February if you'd rather travel when it's cooler. Temperatures are at their lowest then, ranging between -1ºC and 11ºC on average.

More about Seattle

Start your Seattle trip right by choosing the ideal place to stay. As soon as you've booked your flight from London to Seattle, browse our selection of hotels including:
Greyhound: Bus Station and LMN Architects are a couple of top attractions to put on your Seattle itinerary. Continue your sightseeing adventures at Boeing Radiation Effects Lab.

Explore more of United States

You've visited Seattle, now it's time to explore other parts of United States. Travel around 241 kilometres south to Portland to check off its top sights. From Pioneer Courthouse Square to Portland Japanese Garden and Pittock Mansion, your itinerary will be busy.
Spokane is another well-known destination in United States and is around 370 kilometres east of Seattle. No journey is complete without visiting Manito Park, Northwest Museum of Arts & Culture and Spokane Falls.