$394 Cheap Air Canada flights Seattle (SEA) to London (LHR)

View $394 flight on Mon, Dec 8, 2025Opens in a new window

$394 Cheap Air Canada flights Seattle (SEA) to London (LHR)

Prices were available within the past 7 days and start at $394 for one-way flights and $594 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Mon, Dec 8 - Tue, Dec 30
SEA
Seattle
LHR
London
$594 Roundtrip, found 5 days ago
$594
Roundtrip
found 5 days ago
Select Air Canada flight, departing Mon, Dec 8 from Seattle to London, returning Tue, Dec 30, priced at $594 found 5 days ago
Flights from Seattle (SEA) to London (LHR)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Heathrow
Airlines serving
Aer Lingus, Air Canada, Air France, Alaska Airlines, American Airlines, Austrian Airlines, British Airways, Delta, Finnair, Iberia, Icelandair, KLM, Lufthansa, Turkish Airlines, United, Virgin Atlantic
Popular airline
British Airways
Distance
7657 km
Average flight time
17 hours 33 mins