The flight distance from St Louis Lambert International Airport (STL) in St Louis, United States to Fort Smith Airport (YSM) in Fort Smith, Canada is 2,806 kilometers (1,744 miles / 1,515 nautical miles). The estimated flight time for this route is approximately 4h, flying north northwest at a heading of 334°.

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 16:27 in St Louis, it's 15:27 in Fort Smith.

The return flight from Fort Smith (YSM) to St Louis (STL) follows a heading of 138° (southeast). 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 Louis Lambert International Airport (STL) and Fort Smith Airport (YSM) detail pages, or use our flight duration calculator to compare other routes.