£422 Cheap Flights from London to Seattle (LON to SEA)

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Cheap Flights from London (LON) to Seattle (SEA)

Prices were available within the past 7 days and start at £422 for one-way flights and £433 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

All deals

One way

Return

Thu, 24 Oct - Thu, 31 Oct

LHR

London

SEA

Seattle

£433

Return

found 4 hours ago

Thu, 24 Oct - Mon, 28 Oct

LHR

London

SEA

Seattle

£452

Return

found 11 hours ago

Wed, 11 Sep - Sun, 22 Sep

LGW

London

SEA

Seattle

£485

Return

found 1 day ago

Wed, 25 Sep - Wed, 2 Oct

LHR

London

SEA

Seattle

£494

Return

found 8 hours ago

Tue, 31 Dec - Tue, 7 Jan

LHR

London

SEA

Seattle

£497

Return

found 7 hours ago

Tue, 19 Nov - Tue, 26 Nov

LHR

London

SEA

Seattle

£497

Return

found 7 hours ago

Mon, 3 Mar - Mon, 10 Mar

LHR

London

SEA

Seattle

£500

Return

found 7 hours ago

Tue, 29 Oct - Sun, 3 Nov

LHR

London

SEA

Seattle

£502

Return

found 2 days ago

Tue, 19 Nov - Tue, 26 Nov

LHR

London

SEA

Seattle

£509

Return

found 7 hours ago

Tue, 17 Sep - Tue, 24 Sep

LHR

London

SEA

Seattle

£509

Return

found 1 hour ago

Flight from London to Seattle route information
Origin airport	Heathrow
Destination airport	Seattle - Tacoma Intl.
Airlines serving	Aer Lingus, Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, JetBlue Airways, KLM, Lufthansa, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, Virgin Atlantic, WestJet
Return price	£433
Distance	7657 km

Compare flights from London to Seattle easily and book in confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from London to Seattle. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Seattle - Tacoma Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from LON-All Airports to Seattle - Tacoma Intl..

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights.

Grab a great deal on your flight from LON-All Airports (LON) to Seattle - Tacoma Intl. (SEA)

The easiest way to view the best deals on flights from London to Seattle today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from LON-All Airports to Seattle - Tacoma Intl. start at just £433 and range up to £509.

To find an even better deal, try

being flexible on your dates – midweek flights can be cheaper
looking for other airports near London and Seattle
booking your flight during October, the cheapest month on this route
varying your flight times – early morning and late at night are sometimes cheaper

Why you should book your London to Seattle flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from LON-All Airports to Seattle - Tacoma Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.

Frequently asked questions

How much is a flight from London (LON-All Airports) to Sea-Tac Airport?

Within the past 7 days on Expedia, for flights departing within the next year, the lowest price advertised for a round-trip journey from London (LON-All Airports) to Sea-Tac Airport was £433. Cheap tickets don’t wait forever, so book yours today. Prices and availability are subject to change. Additional terms apply.

Do I need to pay a cancellation fee if I cancel my flight from London (LON-All Airports) to Seattle - Tacoma Intl. Airport (SEA)?

This can vary between airlines, as each has its own terms and conditions. Visit the Customer Service Portal, where you’ll find easy-to-follow instructions on how to cancel your flight online.

How do I find cheap flights from London (LON-All Airports) to Sea-Tac Airport that have flexible change policies?

Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you’re searching for London (LON-All Airports) to SEA flights, you’ll see a “no change fees” filter for you to select.

How far is the flight from London (LON-All Airports) to Sea-Tac Airport?

The distance is around 7,700 kilometres, so fill your carry-on bag with all you need to make your journey comfortable. Not sure what to take on board your England to SeaTac flight? A travel pillow, earplugs and a sleep mask are a few essentials.

Which airlines fly direct from London (LON-All Airports) to SEA?

Whether you’re after a one-way or return flight, you’ll have your choice of airlines that will take you straight from London (LON-All Airports) to Sea-Tac Airport. These are some of the most popular ones:

Virgin Atlantic - (VS) with 30 monthly flights
American Airlines - (AA) with 30 monthly flights
British Airways - (BA) with 30 monthly flights
Delta Air Lines - (DL) with 17 monthly flights

Are London (LON-All Airports) to SEA flight tickets cheaper when they're purchased at the last minute?

Flight prices go up and down like a yo-yo, so not always. While last-minute deals between London (LON-All Airports) and Sea-Tac Airport are of course possible, it’s also a good idea to keep a close eye on prices well before you fly. In fact, some carriers publish their prices up to a year before the departure date. Expedia is continuously updating the biggest bargains around, so keep checking back and be ready to book when the price is right.