The flight distance from Seattle-Tacoma International Airport (SEA) in Seattle, United States to St Catharines / Niagara District Airport (YCM) in Niagara-on-the-lake, Canada is 3,362 kilometers (2,089 miles / 1,815 nautical miles). The estimated flight time for this route is approximately 5h, flying east at a heading of 82°.

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 01:34 in Seattle, it's 04:34 in Niagara-on-the-lake. The 3-hour time difference may cause some jet lag. Most travelers adjust within a day or two.

The return flight from Niagara-on-the-lake (YCM) to Seattle (SEA) follows a heading of 293° (west 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 Seattle-Tacoma International Airport (SEA) and St Catharines / Niagara District Airport (YCM) detail pages, or use our flight duration calculator to compare other routes.