The flight distance from Seattle-Tacoma International Airport (SEA) in Seattle, United States to Fort Smith Airport (YSM) in Fort Smith, Canada is 1,550 kilometers (963 miles / 837 nautical miles). The estimated flight time for this route is approximately 3h, flying north northeast at a heading of 22°.

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 06:45 in Seattle, it's 07:45 in Fort Smith.

The return flight from Fort Smith (YSM) to Seattle (SEA) follows a heading of 210° (south southwest). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

For more information about these airports, visit the Seattle-Tacoma International Airport (SEA) and Fort Smith Airport (YSM) detail pages, or use our flight duration calculator to compare other routes.