Calgary (YYC) to Seattle (SEA): 452 miles (727 km) great-circle, about 1h 25m nonstop by our estimate. Cheapest fare observed: $243 round-trip on Air Canada, with 1 stop, departing June 25, 2026.
$243 round-trip, Air Canada AC203, departing 2026-06-25 at 07:00, returning 2026-06-27. The recorded itinerary left on a Thursday, returning on a Saturday 2 nights later; the fare was observed 61 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $243, it ranked 5th of the 30 round-trip fares we recorded from YYC (median $613). That is 53.8 cents per great-circle mile (round-trip price over one-way distance), above the YYC median of 16.9 cents across 30 round-trip routes.
Routes from YYC of similar length: Victoria (452 mi) at $184 and Vancouver (427 mi) at $144.
Air Canada had the cheapest fare on 8 of 30 YYC routes. It is the 28th longest of the 30 routes we track from YYC.
Of 18 departure airports with a fare to Seattle, Calgary (YYC) ranked 11th at $243. Lowest: $122 from Houston (IAH); highest: $690 from Punta Cana (PUJ); 5 nonstop. Cheapest-fare airlines (routes): Frontier (13), Alaska Airlines (2), Air Canada (1), Southwest (1) and United Airlines (1).
That depends on your passport and trip, so check the official source for United States: U.S. Customs and Border Protection: international visitors. Connecting elsewhere? Check that country's transit rules too.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones America/Edmonton, America/Los_Angeles; flight time is our estimate.