The flight distance from Tribhuvan International Airport (KTM) in Kathmandu, Nepal to St Catharines / Niagara District Airport (YCM) in Niagara-on-the-lake, Canada is 11,975 kilometers (7,441 miles / 6,466 nautical miles). The estimated flight time for this route is approximately 15h, flying north northwest at a heading of 348°.

This is an ultra-long-haul route, one of the longest in aviation. It requires wide-body aircraft with extended range capability such as the Airbus A350-900ULR or Boeing 777-200LR. Passengers should prepare for an extended flight with multiple meal services.

This is an international route connecting Nepal with Canada. It is an intercontinental flight between Asia and North America. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.

Time zone information: When it's 10:40 in Kathmandu, it's 23:55 in Niagara-on-the-lake. With a 10.75-hour time difference, travelers should plan for significant jet lag. It typically takes one day per hour of time difference to fully adjust.

There is a significant elevation difference of 4,069 feet between the two airports. St Catharines / Niagara District Airport sits lower than Tribhuvan International Airport.

The return flight from Niagara-on-the-lake (YCM) to Kathmandu (KTM) follows a heading of 14° (north northeast). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

For more information about these airports, visit the Tribhuvan International Airport (KTM) and St Catharines / Niagara District Airport (YCM) detail pages, or use our flight duration calculator to compare other routes.