The flight distance from St Mary's Airport (KSM) in St Mary'S, United States to Calgary International Airport (YYC) in Calgary, Canada is 3,160 kilometers (1,963 miles / 1,706 nautical miles). The estimated flight time for this route is approximately 5h, flying east at a heading of 90°.

This is a medium-haul route that may be operated by either narrow-body or wide-body aircraft depending on demand. Passengers can expect a meal service on most carriers.

This is an international route connecting United States with Canada. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.

Time zone information: When it's 03:18 in St Mary'S, it's 05:18 in Calgary.

There is a significant elevation difference of 3,243 feet between the two airports. Calgary International Airport sits higher than St Mary's Airport.

The return flight from Calgary (YYC) to St Mary'S (KSM) follows a heading of 312° (northwest). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

For more information about these airports, visit the St Mary's Airport (KSM) and Calgary International Airport (YYC) detail pages, or use our flight duration calculator to compare other routes.