Air distance from Kathmandu, Nepal to Belgrade, Serbia is 3713.5 Miles (5976.3 Kilometers / 3224.8 Nautical Miles).
7 hrs, 42 mins is the flight duration between Kathmandu and Belgrade. This is the In-The-Air flight time. You should also add the taxi time, airport wait times and possible delays due to bad weather, etc. for the total flight duration time.