₩756,800 Cheap Flights from London (LHR) to Seattle (SEA)

View ₩756,800 flight on Fri, Jan 16, 2026Opens in a new window

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

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Cheap Flights from London to Seattle (LHR-SEA)

Prices were available within the past 7 days and start at ₩756,800 for one-way flights and ₩1,065,200 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Virgin Atlantic
Sat, Nov 22 - Wed, Nov 26
LHR
London
SEA
Seattle
₩1,065,200 Roundtrip, found 2 days ago
₩1,065,200
Roundtrip
found 2 days ago
Select Virgin Atlantic flight, departing Sat, Nov 22 from London to Seattle, returning Wed, Nov 26, priced at ₩1,065,200 found 2 days ago
Virgin Atlantic
Sat, Nov 22 - Wed, Nov 26
LHR
London
SEA
Seattle
₩1,073,300 Roundtrip, found 2 days ago
₩1,073,300
Roundtrip
found 2 days ago
Select Virgin Atlantic flight, departing Sat, Nov 22 from London to Seattle, returning Wed, Nov 26, priced at ₩1,073,300 found 2 days ago
Iberia
Sat, Nov 22 - Wed, Nov 26
LHR
London
SEA
Seattle
₩1,092,100 Roundtrip, found 2 days ago
₩1,092,100
Roundtrip
found 2 days ago
Select Iberia flight, departing Sat, Nov 22 from London to Seattle, returning Wed, Nov 26, priced at ₩1,092,100 found 2 days ago
Iberia
Sat, Nov 22 - Wed, Nov 26
LHR
London
SEA
Seattle
₩1,095,900 Roundtrip, found 2 days ago
₩1,095,900
Roundtrip
found 2 days ago
Select Iberia flight, departing Sat, Nov 22 from London to Seattle, returning Wed, Nov 26, priced at ₩1,095,900 found 2 days ago
Delta
Sat, Nov 22 - Wed, Nov 26
LHR
London
SEA
Seattle
₩1,102,900 Roundtrip, found 2 days ago
₩1,102,900
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Nov 22 from London to Seattle, returning Wed, Nov 26, priced at ₩1,102,900 found 2 days ago
United
Sat, Nov 22 - Wed, Nov 26
LHR
London
SEA
Seattle
₩1,107,400 Roundtrip, found 2 days ago
₩1,107,400
Roundtrip
found 2 days ago
Select United flight, departing Sat, Nov 22 from London to Seattle, returning Wed, Nov 26, priced at ₩1,107,400 found 2 days ago
Air Canada
Sat, Nov 22 - Wed, Nov 26
LHR
London
SEA
Seattle
₩1,119,800 Roundtrip, found 2 days ago
₩1,119,800
Roundtrip
found 2 days ago
Select Air Canada flight, departing Sat, Nov 22 from London to Seattle, returning Wed, Nov 26, priced at ₩1,119,800 found 2 days ago
Iberia
Sat, Nov 22 - Wed, Nov 26
LHR
London
SEA
Seattle
₩1,131,700 Roundtrip, found 2 days ago
₩1,131,700
Roundtrip
found 2 days ago
Select Iberia flight, departing Sat, Nov 22 from London to Seattle, returning Wed, Nov 26, priced at ₩1,131,700 found 2 days ago
Lufthansa
Sat, Nov 22 - Wed, Nov 26
LHR
London
SEA
Seattle
₩1,134,800 Roundtrip, found 2 days ago
₩1,134,800
Roundtrip
found 2 days ago
Select Lufthansa flight, departing Sat, Nov 22 from London to Seattle, returning Wed, Nov 26, priced at ₩1,134,800 found 2 days ago
KLM
Sat, Nov 22 - Wed, Nov 26
LHR
London
SEA
Seattle
₩1,140,600 Roundtrip, found 2 days ago
₩1,140,600
Roundtrip
found 2 days ago
Select KLM flight, departing Sat, Nov 22 from London to Seattle, returning Wed, Nov 26, priced at ₩1,140,600 found 2 days ago

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

February is typically the cheapest month to fly

From ₩700,655 - ₩1,327,350 per traveler.

Alternative airports near Seattle

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

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city center is 20 minutes. Flights from ₩1,065,200
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from ₩1,065,200

Frequently asked questions

How much is a flight from Heathrow Airport to Sea-Tac Airport?
Start packing your bags, because round-trip journeys from LHR to Seattle - Tacoma Intl. Airport (SEA) start from ₩1,065,200. 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 now to secure 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 Heathrow Airport (LHR) to Sea-Tac Airport?
Most flights can be canceled online, but whether you incur a fee depends on your airline. If you do have to cancel your trip, follow the instructions in the Customer Service Portal.
How do I find cheap flights from Heathrow Airport to SEA 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 London Heathrow to Sea-Tac Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Heathrow Airport (LHR) to Seattle - Tacoma Intl. Airport (SEA)?
With around 7,700 kilometers separating LHR and Seattle - Tacoma Intl. Airport (SEA), your flight will be a long one. Pack wisely to make your time on board more comfortable. Little things like an extra pair of socks and a good neck pillow can make a big difference.
Which airlines fly direct from Heathrow Airport to Sea-Tac Airport?
Getting from London Heathrow to Sea-Tac Airport is easy when you have a good range of airlines to choose from. Here are a few of the best:

  • 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 Heathrow Airport to Sea-Tac Airport flight tickets cheaper when they're purchased at the last minute?
Late planners can sometimes score a bargain, with some of the cheapest airfares from London Heathrow to SEA surfacing a few weeks before the departure date. If you'd rather book ahead, Expedia compares and updates all the best flight deals continuously — as early as a year in advance in some cases. It depends on the carrier though, as not all airlines advertise prices that far in advance.

Travel information

Origin airport
Heathrow
Destination airport
Seattle - Tacoma Intl.
Roundtrip price
₩1,065,200
Distance
7657 km
Average flight time
2 hours 9 mins

Book with confidence

London to Seattle 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 London to Seattle 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 Seattle.

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 LHR to SEA flights that won’t make your bank account wince. Ready to temporarily leave behind London 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 SEA 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.

London to Seattle Flights

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