Searching for cheap Kolkata Kathmandu flights? Take a look at the flight schedule and book your travel only on Cleartrip.com. We offer you a wide choice of airlines like Air India for your flight booking. There are 4 weekly flights from Kolkata to Kathmandu. The first flight from Kolkata Kathmandu is at 1:50 PM, which is Air India airline 247. The last flight from Kolkata Kathmandu is at 1:50 PM, which is Air India 247. Be sure to find the best offers and deals for cheap flights from CCU to KTM.