Cheap Flights from Seattle (SEA) to London (LHR) from AU$401

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

Prices were available within the past 7 days and start at AU$401 for one-way flights and AU$960 for round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Sun., 3 Nov. - Tue., 12 Nov.
SEA
Seattle
LHR
London
AU$960 Return, found 17 hours ago
AU$960
Return
found 17 hours ago
Select Icelandair flight, departing Sun., 3 Nov. from Seattle to London, returning Tue., 12 Nov., priced at AU$960 found 17 hours ago
Icelandair
Sun., 3 Nov. - Tue., 12 Nov.
SEA
Seattle
LHR
London
AU$962 Return, found 17 hours ago
AU$962
Return
found 17 hours ago
Select Icelandair flight, departing Sun., 3 Nov. from Seattle to London, returning Tue., 12 Nov., priced at AU$962 found 17 hours ago
British Airways
Sun., 3 Nov. - Tue., 12 Nov.
SEA
Seattle
LHR
London
AU$977 Return, found 17 hours ago
AU$977
Return
found 17 hours ago
Select British Airways flight, departing Sun., 3 Nov. from Seattle to London, returning Tue., 12 Nov., priced at AU$977 found 17 hours ago
United
Sun., 27 Oct. - Tue., 5 Nov.
SEA
Seattle
LHR
London
AU$979 Return, found 6 days ago
AU$979
Return
found 6 days ago
Select United flight, departing Sun., 27 Oct. from Seattle to London, returning Tue., 5 Nov., priced at AU$979 found 6 days ago
Virgin Atlantic
Sun., 27 Oct. - Tue., 5 Nov.
SEA
Seattle
LHR
London
AU$989 Return, found 6 days ago
AU$989
Return
found 6 days ago
Select Virgin Atlantic flight, departing Sun., 27 Oct. from Seattle to London, returning Tue., 5 Nov., priced at AU$989 found 6 days ago
Delta
Sun., 13 Oct. - Tue., 22 Oct.
SEA
Seattle
LHR
London
AU$990 Return, found 6 days ago
AU$990
Return
found 6 days ago
Select Delta flight, departing Sun., 13 Oct. from Seattle to London, returning Tue., 22 Oct., priced at AU$990 found 6 days ago
Air Canada
Sun., 3 Nov. - Tue., 12 Nov.
SEA
Seattle
LHR
London
AU$1,027 Return, found 17 hours ago
AU$1,027
Return
found 17 hours ago
Select Air Canada flight, departing Sun., 3 Nov. from Seattle to London, returning Tue., 12 Nov., priced at AU$1,027 found 17 hours ago
Swiss International Air Lines
Sun., 3 Nov. - Tue., 12 Nov.
SEA
Seattle
LHR
London
AU$1,035 Return, found 17 hours ago
AU$1,035
Return
found 17 hours ago
Select Swiss International Air Lines flight, departing Sun., 3 Nov. from Seattle to London, returning Tue., 12 Nov., priced at AU$1,035 found 17 hours ago
Air France
Sun., 13 Oct. - Tue., 22 Oct.
SEA
Seattle
LHR
London
AU$1,060 Return, found 6 days ago
AU$1,060
Return
found 6 days ago
Select Air France flight, departing Sun., 13 Oct. from Seattle to London, returning Tue., 22 Oct., priced at AU$1,060 found 6 days ago
KLM
Sun., 27 Oct. - Tue., 5 Nov.
SEA
Seattle
LHR
London
AU$1,064 Return, found 6 days ago
AU$1,064
Return
found 6 days ago
Select KLM flight, departing Sun., 27 Oct. from Seattle to London, returning Tue., 5 Nov., priced at AU$1,064 found 6 days ago
Flight from Seattle to London route information
Origin airport
Seattle - Tacoma Intl.
Destination airport
Heathrow
Airlines serving
Aer Lingus, Air Canada, Air France, Alaska Airlines, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, KLM, Lufthansa, Swiss International Air Lines, Turkish Airlines, United, Virgin Atlantic, WestJet
Return price
AU$959
Distance
7657 km
Average flight time
17 hours 25 mins

Your quick guide to flights from Seattle to London

Pick up great flights from Seattle to London

With Expedia, you have your pick of 20 flights a day with 20 airlines covering flights from Seattle to London. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from Seattle to London that take around 25 hours.

Find cheap flights from Seattle to London

From the great flight deals with prices currently ranging from AU$960 to AU$1,064, you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from Seattle to London around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to London is normally in November.

Reasons to book your flight from Seattle to London with Expedia

Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from Seattle to London across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to London right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.

Frequently asked questions

How much is a flight from Sea-Tac Airport to Heathrow Airport (LHR)?
If you’re travelling between SEA and London Heathrow, round-trip journeys start from AU$960. This price is based on fares listed within the last 7 days on Expedia for flights departing within the next year, so don’t delay. Book today and save yourself money and time. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from SEA to Heathrow Airport?
The majority of flights can be cancelled online, but whether you are charged a fee all comes down to your airline. If you do need to cancel your trip, follow the instructions in the Customer Service Portal.
How do I find cheap flights from Seattle - Tacoma Intl. Airport (SEA) to LHR 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 Seattle - Tacoma Intl. Airport (SEA) to London Heathrow flights, you’ll see a “no change fees” filter for you to select.
How far is the flight from Seattle - Tacoma Intl. Airport (SEA) to Heathrow Airport?
With a flight distance of 7 700 kilometres between Sea-Tac Airport and Heathrow Airport (LHR), this is a long trip. Be sure to drink plenty of water and go for a short walk down the aisle every now and then.
Which airlines fly direct from SEA to Heathrow Airport (LHR)?
It’s easy to fly directly from Sea-Tac Airport to Heathrow Airport. Below are the most sought-after carriers that offer nonstop services on this route:

  • 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 SEA to LHR flight tickets cheaper when they're purchased at the last minute?
Flight prices are constantly going up and down, so there are no guarantees. While last-minute deals between Seattle - Tacoma Intl. Airport (SEA) and Heathrow Airport are of course possible, it’s also a good idea to keep track of prices well before you fly. In fact, some airlines announce their prices up to a year prior to the departure date. Expedia is constantly updating the best bargains around, so keep checking back and be ready to lock in your seat when the price dips.
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London

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