Air distance from Kathmandu Nepal to Vientiane Laos is 1288 Miles (2072.8 Kilometers / 1118.5 Nautical Miles).
Flight duration time from Kathmandu Nepal to Vientiane Laos is 2 hrs, 40 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.