Cheap Flights From Heathrow (LHR) To Seattle - Tacoma Intl. (SEA)

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

The cheapest flights to Seattle - Tacoma Intl. found within the past 7 days were CA $688 round trip and CA $548 one way. Prices and availability subject to change. Additional terms may apply.

Wed, Feb 11 - Wed, Mar 11
LHR
London
SEA
Seattle
CA $688 Roundtrip, found 6 days ago
CA $688
Roundtrip
found 6 days ago
Select Lufthansa flight, departing Wed, Feb 11 from London to Seattle, returning Wed, Mar 11, priced at CA $688 found 6 days ago
Tue, Feb 24 - Wed, Mar 4
LHR
London
SEA
Seattle
CA $704 Roundtrip, found 6 days ago
CA $704
Roundtrip
found 6 days ago
Select Icelandair flight, departing Tue, Feb 24 from London to Seattle, returning Wed, Mar 4, priced at CA $704 found 6 days ago
Tue, Feb 10 - Mon, Feb 23
LHR
London
SEA
Seattle
CA $722 Roundtrip, found 7 hours ago
CA $722
Roundtrip
found 7 hours ago
Select Brussels Airlines flight, departing Tue, Feb 10 from London to Seattle, returning Mon, Feb 23, priced at CA $722 found 7 hours ago
Tue, Feb 10 - Thu, Feb 19
LHR
London
SEA
Seattle
CA $727 Roundtrip, found 7 hours ago
CA $727
Roundtrip
found 7 hours ago
Select Virgin Atlantic flight, departing Tue, Feb 10 from London to Seattle, returning Thu, Feb 19, priced at CA $727 found 7 hours ago
Tue, Feb 24 - Wed, Mar 4
LHR
London
SEA
Seattle
CA $733 Roundtrip, found 6 days ago
CA $733
Roundtrip
found 6 days ago
Select Air Canada flight, departing Tue, Feb 24 from London to Seattle, returning Wed, Mar 4, priced at CA $733 found 6 days ago
Sun, Feb 15 - Sun, Mar 1
LHR
London
SEA
Seattle
CA $739 Roundtrip, found 2 days ago
CA $739
Roundtrip
found 2 days ago
Select Austrian Airlines flight, departing Sun, Feb 15 from London to Seattle, returning Sun, Mar 1, priced at CA $739 found 2 days ago
Tue, Feb 3 - Tue, Feb 10
LHR
London
SEA
Seattle
CA $741 Roundtrip, found 6 days ago
CA $741
Roundtrip
found 6 days ago
Select British Airways flight, departing Tue, Feb 3 from London to Seattle, returning Tue, Feb 10, priced at CA $741 found 6 days ago
Tue, Feb 24 - Wed, Mar 4
LHR
London
SEA
Seattle
CA $741 Roundtrip, found 6 days ago
CA $741
Roundtrip
found 6 days ago
Select Virgin Atlantic flight, departing Tue, Feb 24 from London to Seattle, returning Wed, Mar 4, priced at CA $741 found 6 days ago
Tue, Feb 17 - Wed, Feb 25
LHR
London
SEA
Seattle
CA $775 Roundtrip, found 5 hours ago
CA $775
Roundtrip
found 5 hours ago
Select Finnair flight, departing Tue, Feb 17 from London to Seattle, returning Wed, Feb 25, priced at CA $775 found 5 hours ago
Tue, Feb 17 - Wed, Feb 25
LHR
London
SEA
Seattle
CA $776 Roundtrip, found 5 hours ago
CA $776
Roundtrip
found 5 hours ago
Select Iberia flight, departing Tue, Feb 17 from London to Seattle, returning Wed, Feb 25, priced at CA $776 found 5 hours ago

Frequently asked questions

Are there direct flights from LHR to Sea-Tac Airport?
Your next incredible adventure is on the opposite side of a single flight. You can travel direct from LHR to Sea-Tac Airport with multiple airlines, including Virgin Atlantic and American Airlines.
What airlines fly from Heathrow Airport (LHR) to Seattle - Tacoma Intl. Airport (SEA)?
There are a number of airlines that advertise direct flights from Heathrow Airport to SEA. Virgin Atlantic (VS) is one of the most well-known, offering around 30 flights every month. If you'd like more options, look up American Airlines (AA). This airline operates 30 flights every month. Between the two, you're bound to find the flight that's perfect for you.
What is the best day to buy a plane ticket?
Airfares offered on Friday tend to be the cheapest, according to flight demand on Travelocity.ca in 2021. Purchasing your airfares on a Thursday or Saturday can also provide better value, however our advice if you're looking to save money is to avoid booking on a Wednesday or Sunday. Our data shows that those two days have the highest ticket values on average, so keep this in mind if you're browsing flight deals.
What are the cheapest days to fly?
Frequent travellers may already know this, but earlier in the week is often the cheapest time to fly. Flights departing on a Monday are the cheapest of the week. Since flights towards the middle of the week tend to be more popular, this causes the prices to rise. This is why, on average, airfares booked on Travelocity.ca in 2021 were most expensive for Wednesday departures.
How far in advance can you book a flight?
Here's the deal: It is typically possible to start comparing international airfares on Travelocity.ca up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 2-4 weeks prior to their travel dates.*According to flight demand on Travelocity.ca from January to December 2021. Savings are subject to change and may vary depending on selections made.
*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.