NZ$397 Cheap Flights Seattle to London (SEA-LON)

View NZ$397 flight on Mon, 22 Sep. 2025Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to London

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

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

Icelandair
Thu, 14 Aug. - Wed, 20 Aug.
SEA
Seattle
LGW
London
NZ$885 Return, found 12 hours ago
NZ$885
Return
found 12 hours ago
Select Icelandair flight, departing Thu, 14 Aug. from Seattle to London, returning Wed, 20 Aug., priced at NZ$885 found 12 hours ago
Icelandair
Thu, 14 Aug. - Wed, 20 Aug.
SEA
Seattle
LGW
London
NZ$887 Return, found 12 hours ago
NZ$887
Return
found 12 hours ago
Select Icelandair flight, departing Thu, 14 Aug. from Seattle to London, returning Wed, 20 Aug., priced at NZ$887 found 12 hours ago
Delta
Thu, 14 Aug. - Thu, 21 Aug.
SEA
Seattle
LGW
London
NZ$888 Return, found 1 day ago
NZ$888
Return
found 1 day ago
Select Delta flight, departing Thu, 14 Aug. from Seattle to London, returning Thu, 21 Aug., priced at NZ$888 found 1 day ago
Aer Lingus
Thu, 4 Sep. - Thu, 11 Sep.
SEA
Seattle
LHR
London
NZ$889 Return, found 4 days ago
NZ$889
Return
found 4 days ago
Select Aer Lingus flight, departing Thu, 4 Sep. from Seattle to London, returning Thu, 11 Sep., priced at NZ$889 found 4 days ago
Icelandair
Thu, 14 Aug. - Wed, 20 Aug.
SEA
Seattle
LGW
London
NZ$911 Return, found 12 hours ago
NZ$911
Return
found 12 hours ago
Select Icelandair flight, departing Thu, 14 Aug. from Seattle to London, returning Wed, 20 Aug., priced at NZ$911 found 12 hours ago
Icelandair
Thu, 14 Aug. - Wed, 20 Aug.
SEA
Seattle
LGW
London
NZ$914 Return, found 12 hours ago
NZ$914
Return
found 12 hours ago
Select Icelandair flight, departing Thu, 14 Aug. from Seattle to London, returning Wed, 20 Aug., priced at NZ$914 found 12 hours ago
Delta
Thu, 14 Aug. - Wed, 20 Aug.
SEA
Seattle
LHR
London
NZ$929 Return, found 9 hours ago
NZ$929
Return
found 9 hours ago
Select Delta flight, departing Thu, 14 Aug. from Seattle to London, returning Wed, 20 Aug., priced at NZ$929 found 9 hours ago
Virgin Atlantic
Thu, 14 Aug. - Wed, 20 Aug.
SEA
Seattle
LHR
London
NZ$939 Return, found 9 hours ago
NZ$939
Return
found 9 hours ago
Select Virgin Atlantic flight, departing Thu, 14 Aug. from Seattle to London, returning Wed, 20 Aug., priced at NZ$939 found 9 hours ago
United
Thu, 14 Aug. - Wed, 20 Aug.
SEA
Seattle
LHR
London
NZ$948 Return, found 9 hours ago
NZ$948
Return
found 9 hours ago
Select United flight, departing Thu, 14 Aug. from Seattle to London, returning Wed, 20 Aug., priced at NZ$948 found 9 hours ago
Air France
Thu, 14 Aug. - Wed, 20 Aug.
SEA
Seattle
LHR
London
NZ$1,025 Return, found 9 hours ago
NZ$1,025
Return
found 9 hours ago
Select Air France flight, departing Thu, 14 Aug. from Seattle to London, returning Wed, 20 Aug., priced at NZ$1,025 found 9 hours ago
Flight from Seattle to London route information
Origin airport
Seattle - Tacoma Intl.
Destination airport
Gatwick
Return price
NZ$884
Distance
7697 km

Perfect flights from Seattle to London

Embark on an unforgettable journey without breaking the bank with Expedia's incredible deals on cheap flights from Seattle to London. Whether you're aching for a romantic escape with your partner, craving an adventurous solo expedition, or yearning to immerse yourself in the local history and culture, we've got you covered.
 
Picture yourself strolling through the streets of , surrounded by breathtaking architecture and absorbing the vibrant atmosphere of this captivating city. Indulge in the mouth-watering local specialties, from tantalizing street food to exquisite fine dining. With Expedia, you can experience all of this and more, without sacrificing your budget.
 
Our flexible Seattle - Tacoma Intl. to LON-All Airports ticket options cater to your travel preferences, with incredible one-way fares from NZ$397 and roundtrip prices from NZ$885. Whether you're planning a short city break or a longer adventure, our dynamic pricing ensures that you find the best deals for your journey.
 
But the magic doesn't stop there. Expedia offers a range of partner services to enhance your trip. Rent a car at LON-All Airports and explore and its surrounding areas at your own pace. Discover hidden gems off the beaten path, and create unforgettable memories. We also provide a handpicked selection of accommodations, from charming bed and breakfasts to luxury hotels, ensuring that you have a comfortable and memorable stay.
 
Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support are designed to make your travel experience seamless and stress-free. So, why wait? Book your to travel arrangements today and embark on the journey of a lifetime in London.

Frequently asked questions

How much is a flight from Sea-Tac Airport to London (LON-All Airports)?
Round-trip journeys from Seattle - Tacoma Intl. Airport (SEA) to London (LON-All Airports) start from NZ$885. This is based on fares offered within the last 7 days on Expedia for flights departing within the next year — book now so you don't miss out. 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 London (LON-All Airports)?
Most flights can be cancelled online, but each air carrier has its own terms and conditions. If you do decide to cancel your flight, visit our Customer Service Portal and follow the instructions.
How do I find cheap flights from SEA to London (LON-All Airports) 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 SEA to London (LON-All Airports) flights, you'll see a "no change fees" filter for you to select.
How many hours is the flight from Seattle - Tacoma Intl. Airport (SEA) to London (LON-All Airports)?
Make the 14 hours and 48 minutes between SEA and London (LON-All Airports) as comfortable as you can. Bring the essentials, like a water bottle, toothbrush and toiletries, and simply enjoy the flight!
How far is the flight from SEA to London (LON-All Airports)?
With around 7 700 kilometres separating SEA and London (LON-All Airports), your flight will be a long one. Pack wisely and make your time on board comfortable. Simple things like an eye mask and a good travel pillow can make a massive difference.
Which airlines fly direct from Seattle - Tacoma Intl. Airport (SEA) to London (LON-All Airports)?
You have lots of options when flying from SEA to London (LON-All Airports). Lock in your fare with one of these popular airlines:

  • 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-Tac Airport to London (LON-All Airports) flight tickets cheaper when they're purchased at the last minute?
Booking last minute from SEA to London (LON-All Airports) can be hit-or-miss. It is possible to score a bargain, but you could also miss out entirely! If you'd prefer to play it safe and start planning early on, Expedia compares flight deals up to 12 months in advance. Just remember that not all airlines publish their prices that far in advance. Our suggestion? Check back often as updates are made regularly.

Explore a world of travel with Expedia

London Flight Deals

London

Seattle to Gatwick
NZ$884.20
Seattle to Heathrow
NZ$888.06
*Available to Expedia members.