₹34,706 Cheap Flights from Seattle (SEA) to London (LHR)

View ₹34,706 flight on Tue, 14 Oct 2025Opens 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 ₹34,706 for one-way flights and ₹44,500 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Tue, 23 Sept - Tue, 7 Oct
SEA
Seattle
LHR
London
₹44,500 Return, found 6 days ago
₹44,500
Return
found 6 days ago
Select Air Canada flight, departing Tue, 23 Sept from Seattle to London, returning Tue, 7 Oct, priced at ₹44,500 found 6 days ago
United
Sun, 14 Sept - Tue, 30 Sept
SEA
Seattle
LHR
London
₹45,424 Return, found 3 days ago
₹45,424
Return
found 3 days ago
Select United flight, departing Sun, 14 Sept from Seattle to London, returning Tue, 30 Sept, priced at ₹45,424 found 3 days ago
Virgin Atlantic
Sun, 14 Sept - Tue, 30 Sept
SEA
Seattle
LHR
London
₹45,425 Return, found 3 days ago
₹45,425
Return
found 3 days ago
Select Virgin Atlantic flight, departing Sun, 14 Sept from Seattle to London, returning Tue, 30 Sept, priced at ₹45,425 found 3 days ago
Delta
Tue, 7 Oct - Tue, 28 Oct
SEA
Seattle
LHR
London
₹45,425 Return, found 2 days ago
₹45,425
Return
found 2 days ago
Select Delta flight, departing Tue, 7 Oct from Seattle to London, returning Tue, 28 Oct, priced at ₹45,425 found 2 days ago
Delta
Tue, 23 Sept - Tue, 7 Oct
SEA
Seattle
LHR
London
₹45,537 Return, found 6 days ago
₹45,537
Return
found 6 days ago
Select Delta flight, departing Tue, 23 Sept from Seattle to London, returning Tue, 7 Oct, priced at ₹45,537 found 6 days ago
United
Tue, 23 Sept - Tue, 7 Oct
SEA
Seattle
LHR
London
₹45,595 Return, found 6 days ago
₹45,595
Return
found 6 days ago
Select United flight, departing Tue, 23 Sept from Seattle to London, returning Tue, 7 Oct, priced at ₹45,595 found 6 days ago
Delta
Sat, 13 Sept - Wed, 24 Sept
SEA
Seattle
LHR
London
₹45,846 Return, found 4 days ago
₹45,846
Return
found 4 days ago
Select Delta flight, departing Sat, 13 Sept from Seattle to London, returning Wed, 24 Sept, priced at ₹45,846 found 4 days ago
United
Sat, 13 Sept - Wed, 24 Sept
SEA
Seattle
LHR
London
₹45,847 Return, found 4 days ago
₹45,847
Return
found 4 days ago
Select United flight, departing Sat, 13 Sept from Seattle to London, returning Wed, 24 Sept, priced at ₹45,847 found 4 days ago
United
Sun, 14 Sept - Tue, 30 Sept
SEA
Seattle
LHR
London
₹45,918 Return, found 3 days ago
₹45,918
Return
found 3 days ago
Select United flight, departing Sun, 14 Sept from Seattle to London, returning Tue, 30 Sept, priced at ₹45,918 found 3 days ago
British Airways
Tue, 21 Oct - Fri, 31 Oct
SEA
Seattle
LHR
London
₹47,817 Return, found 4 days ago
₹47,817
Return
found 4 days ago
Select British Airways flight, departing Tue, 21 Oct from Seattle to London, returning Fri, 31 Oct, priced at ₹47,817 found 4 days ago

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

October is typically the cheapest month to fly

From ₹42,154 - ₹80,368 per traveller.
Flight from Seattle to London route information
Origin airport
Seattle - Tacoma Intl.
Destination airport
Heathrow
Return price
₹44,500
Distance
7657 km
Average flight time
17 hours 33 mins

Seattle to London Flights

Sometimes you just need to get out of town or maybe you’re looking for a change of scenery. Regardless of the reason, a flight from Seattle to London will do just the trick! Go on, plan to see all the famous landmarks and eat your weight in the local cuisine. Your trip is beckoning, so answer the call by packing your suitcase and filling your travel itinerary with exploring London.

Whether you’re flying for business or jet-setting on your personal time, you’ve come to the right place. Here at Expedia.com, we’ll pair you up with SEA to LHR flights that won’t make your bank account wince. Ready to temporarily leave behind Seattle for new horizons? Browse through our cheap airfare, and filter by flight times and dates until you find just what you had in mind. From flights without layovers to ones that arrive early in the morning, you’ll come across plane tickets that suit your travel preferences. You can even bundle your flight to LHR with hotels and car rentals to score even bigger savings.

All set to hit the clouds? Book your travel arrangements with us today and have left-over money to put toward your travel outings and adventures.

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 ₹44,500. 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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