Air distance from Kathmandu, Nepal to Boston, USA is 7392 Miles (11896.2 Kilometers / 6419.2 Nautical Miles).
Flight duration time from Kathmandu to Boston is 15 hrs, 20 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.