₹35,425 Cheap Flights from Seattle (SEA) to London (LHR)

View ₹35,425 flight on Tue, 10 Feb 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at ₹35,425 for one-way flights and ₹55,091 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Thu, 8 Jan - Wed, 21 Jan
SEA
Seattle
LHR
London
₹55,091 Return, found 13 hours ago
₹55,091
Return
found 13 hours ago
Select Air Canada flight, departing Thu, 8 Jan from Seattle to London, returning Wed, 21 Jan, priced at ₹55,091 found 13 hours ago
United
Wed, 11 Mar - Wed, 18 Mar
SEA
Seattle
LHR
London
₹55,156 Return, found 4 days ago
₹55,156
Return
found 4 days ago
Select United flight, departing Wed, 11 Mar from Seattle to London, returning Wed, 18 Mar, priced at ₹55,156 found 4 days ago
Air Canada
Thu, 8 Jan - Wed, 21 Jan
SEA
Seattle
LHR
London
₹55,679 Return, found 13 hours ago
₹55,679
Return
found 13 hours ago
Select Air Canada flight, departing Thu, 8 Jan from Seattle to London, returning Wed, 21 Jan, priced at ₹55,679 found 13 hours ago
Air Canada
Wed, 11 Mar - Wed, 18 Mar
SEA
Seattle
LHR
London
₹55,739 Return, found 4 days ago
₹55,739
Return
found 4 days ago
Select Air Canada flight, departing Wed, 11 Mar from Seattle to London, returning Wed, 18 Mar, priced at ₹55,739 found 4 days ago
Virgin Atlantic
Wed, 11 Mar - Wed, 18 Mar
SEA
Seattle
LHR
London
₹55,745 Return, found 4 days ago
₹55,745
Return
found 4 days ago
Select Virgin Atlantic flight, departing Wed, 11 Mar from Seattle to London, returning Wed, 18 Mar, priced at ₹55,745 found 4 days ago
United
Tue, 10 Feb - Mon, 16 Feb
SEA
Seattle
LHR
London
₹56,061 Return, found 1 hour ago
₹56,061
Return
found 1 hour ago
Select United flight, departing Tue, 10 Feb from Seattle to London, returning Mon, 16 Feb, priced at ₹56,061 found 1 hour ago
United
Thu, 5 Feb - Thu, 12 Feb
SEA
Seattle
LHR
London
₹56,071 Return, found 1 day ago
₹56,071
Return
found 1 day ago
Select United flight, departing Thu, 5 Feb from Seattle to London, returning Thu, 12 Feb, priced at ₹56,071 found 1 day ago
Lufthansa
Thu, 8 Jan - Wed, 21 Jan
SEA
Seattle
LHR
London
₹56,800 Return, found 13 hours ago
₹56,800
Return
found 13 hours ago
Select Lufthansa flight, departing Thu, 8 Jan from Seattle to London, returning Wed, 21 Jan, priced at ₹56,800 found 13 hours ago
Air Canada
Tue, 10 Feb - Mon, 16 Feb
SEA
Seattle
LHR
London
₹57,612 Return, found 1 hour ago
₹57,612
Return
found 1 hour ago
Select Air Canada flight, departing Tue, 10 Feb from Seattle to London, returning Mon, 16 Feb, priced at ₹57,612 found 1 hour ago
Delta
Thu, 8 Jan - Wed, 21 Jan
SEA
Seattle
LHR
London
₹57,624 Return, found 13 hours ago
₹57,624
Return
found 13 hours ago
Select Delta flight, departing Thu, 8 Jan from Seattle to London, returning Wed, 21 Jan, priced at ₹57,624 found 13 hours ago

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

October is typically the cheapest month to fly

From ₹42,751 - ₹75,525 per traveller.

Alternative airports near London

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Heathrow LHR. Cheapest option available. Average driving time to city centre is 28 minutes. Flights from ₹113,169
LHR
Heathrow
Cheapest
Average driving time to city centre28 min
Flights from ₹113,169
Flight from Seattle to London route information
Origin airport
Seattle - Tacoma Intl.
Destination airport
Heathrow
Airlines serving
Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Delta, Finnair, Iberia, KLM, Lufthansa, Turkish Airlines, United, Virgin Atlantic
Return price
₹55,091
Distance
7657 km
Average flight time
17 hours 38 mins

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 Heathrow ticket options cater to your travel preferences, with incredible one-way fares from ₹35,425 and roundtrip prices from ₹55,091. 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 Heathrow 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 Heathrow Airport (LHR)?
If you're travelling between SEA and London Heathrow, round-trip journeys start from ₹55,091. 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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