Air distance from Kathmandu, Nepal to Riyadh, Saudi Arabia is 2407.9 Miles (3875.2 Kilometers / 2091.1 Nautical Miles).
Flight duration time from Kathmandu to Riyadh is 5 hrs, 0 mins. 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.