S$533 Cheap Flights from Seattle to London

View S$533 flight on Wed, 3 Sep, 2025Opens in a new window

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

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Cheap Flights from Seattle to London (SEA-LGW)

Prices were available within the past 7 days and start at S$533 for one-way flights and S$617 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, 19 Aug - Thu, 4 Sep
SEA
Seattle
LGW
London
S$617 Return, found 2 days ago
S$617
Return
found 2 days ago
Select Delta flight, departing Tue, 19 Aug from Seattle to London, returning Thu, 4 Sep, priced at S$617 found 2 days ago
Delta
Tue, 12 Aug - Tue, 26 Aug
SEA
Seattle
LGW
London
S$617 Return, found 2 days ago
S$617
Return
found 2 days ago
Select Delta flight, departing Tue, 12 Aug from Seattle to London, returning Tue, 26 Aug, priced at S$617 found 2 days ago
Delta
Sun, 3 Aug - Tue, 19 Aug
SEA
Seattle
LGW
London
S$650 Return, found 2 days ago
S$650
Return
found 2 days ago
Select Delta flight, departing Sun, 3 Aug from Seattle to London, returning Tue, 19 Aug, priced at S$650 found 2 days ago
Delta
Tue, 19 Aug - Sun, 31 Aug
SEA
Seattle
LGW
London
S$681 Return, found 2 days ago
S$681
Return
found 2 days ago
Select Delta flight, departing Tue, 19 Aug from Seattle to London, returning Sun, 31 Aug, priced at S$681 found 2 days ago
Delta
Sat, 2 Aug - Tue, 19 Aug
SEA
Seattle
LGW
London
S$714 Return, found 2 days ago
S$714
Return
found 2 days ago
Select Delta flight, departing Sat, 2 Aug from Seattle to London, returning Tue, 19 Aug, priced at S$714 found 2 days ago
Delta
Sat, 16 Aug - Sun, 31 Aug
SEA
Seattle
LGW
London
S$745 Return, found 2 days ago
S$745
Return
found 2 days ago
Select Delta flight, departing Sat, 16 Aug from Seattle to London, returning Sun, 31 Aug, priced at S$745 found 2 days ago
Virgin Atlantic
Wed, 6 Aug - Tue, 19 Aug
SEA
Seattle
LGW
London
S$758 Return, found 2 days ago
S$758
Return
found 2 days ago
Select Virgin Atlantic flight, departing Wed, 6 Aug from Seattle to London, returning Tue, 19 Aug, priced at S$758 found 2 days ago
Icelandair
Wed, 26 Nov - Sat, 13 Dec
SEA
Seattle
LGW
London
S$761 Return, found 1 day ago
S$761
Return
found 1 day ago
Select Icelandair flight, departing Wed, 26 Nov from Seattle to London, returning Sat, 13 Dec, priced at S$761 found 1 day ago
Swiss International Air Lines
Mon, 1 Sep - Mon, 8 Sep
SEA
Seattle
LGW
London
S$814 Return, found 3 days ago
S$814
Return
found 3 days ago
Select Swiss International Air Lines flight, departing Mon, 1 Sep from Seattle to London, returning Mon, 8 Sep, priced at S$814 found 3 days ago
Turkish Airlines
Mon, 3 Nov - Wed, 19 Nov
SEA
Seattle
LGW
London
S$1,032 Return, found 1 day ago
S$1,032
Return
found 1 day ago
Select Turkish Airlines flight, departing Mon, 3 Nov from Seattle to London, returning Wed, 19 Nov, priced at S$1,032 found 1 day ago

Find the cheapest month to fly from Seattle (SEA) to London (LGW)

February is typically the cheapest month to fly

From S$651 - S$1,319 per traveller.

Graph displaying average flight prices per month

Seattle to London route information
Origin airport
Seattle - Tacoma Intl.
Destination airport
Gatwick
Airlines serving
Icelandair, Turkish Airlines
Return price
S$616
Distance
7697 km

Perfect flights from Seattle to London

Your Journey from Seattle to London

Start your unforgettable journey with Expedia. Our broad selection of flights from Seattle to London caters to every travel need. Whether you're yearning for a romantic escape, a solo adventure, or a cultural immersion, we've got you covered.
 

Choosing Your Ideal Flight

With Expedia, you have access to a wide range of airlines, including Delta, Virgin Atlantic, American Airlines, Air Canada, Air France, United, Icelandair, Swiss International Air Lines, Turkish Airlines. Our selection of flights from Seattle - Tacoma Intl. to Gatwick caters to every traveler's requirements, ensuring your journey aligns with your schedule. With options from 20 airlines, you're bound to find the perfect flight.
 

Maximizing Value with Seattle to London Flights

Experience the joy of finding cheap flights from Seattle - Tacoma Intl. to Gatwick that fit your budget. Keep an eye out for our special deals and discounts, and check our flexible one-way fares from S$533 and roundtrip prices from S$617*.
 

Pre-Flight Essentials

Ensure a smooth journey from Seattle to London with Expedia. From information about check-in times and in-flight amenities to guidance on baggage policies, we provide all the essentials to prepare you for your flight.
 

Experience the Vibrant London

Picture yourself stepping off the plane in London and immersing yourself in the unique atmosphere of . From local markets to cultural festivals, each city offers its distinct charm. Make the most of your trip by exploring local attractions and indulging in the local cuisine. With Expedia, explore all this and more, tailored to your budget.
 

Added Convenience on Your Seattle to London Flight

Traveling with Expedia is more than just a flight. We offer details about in-flight amenities, baggage policies, and more to ensure a smooth and hassle-free journey. Choose from our variety of airlines and embark on a memorable journey from Seattle to London.
 

Beyond the Flight – Exploring London

With Expedia, your adventure extends beyond the flight. Explore London at your own pace by renting a car or booking a hotel. Discover hidden gems off the beaten path and create unforgettable memories.
 

Book Your Flight from Seattle to London with Confidence

Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support make your travel experience seamless and stress-free. Embark on your journey from Seattle to London with confidence. Book your travel arrangements with Expedia today.
 
*Note: Prices may vary based on availability and are subject to change.

Frequently asked questions

How much is a flight from Sea-Tac Airport to Gatwick Airport (LGW)?
Start packing your suitcase, because round-trip flights between Sea-Tac Airport and Gatwick Airport (LGW) start from S$617. That's based on airfares listed within the last 7 days on Expedia for flights departing within the next year. Prices can change quickly, so book today to nab the best deal. 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 Gatwick?
We get that life can throw the odd curveball, so we've made it as hassle-free as possible for you to cancel your flight online. Just visit the Customer Service Portal and follow the instructions.
How do I find cheap flights from SEA to LGW 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 Gatwick 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 Gatwick Airport (LGW)?
The distance is around 7,800 kilometres. Eye mask? Check. Spare socks? Double check. We suggest you pack all the travel comforts for this long-haul SeaTac to Gatwick flight.
Which airlines fly direct from Seattle - Tacoma Intl. Airport (SEA) to London Gatwick?
You won't find any airlines flying directly between Sea-Tac Airport and London Gatwick, so be ready to make at least one stop on your journey. A layover can be a nice way to break up a trip!
Are Sea-Tac Airport to LGW flight tickets cheaper when they're purchased at the last minute?
Flight prices are constantly going up and down, so not always. While last-minute deals between Seattle - Tacoma Intl. Airport (SEA) and London Gatwick are possible, it also makes sense to keep an eye on prices well before you fly. In fact, some airlines publish their prices up to 12 months ahead of the departure date. Expedia is continuously updating the best airfare bargains around, so keep checking and be ready to pounce when the fares dip.

Explore a world of travel with Expedia

London Airports

London

Seattle to Heathrow
S$661.90
*Available to Expedia members.