Air distance from Hiroshima, Japan to Hanoi, Vietnam is 1866.9 Miles (3004.5 Kilometers / 1621.2 Nautical Miles).
Flight duration time from Hiroshima to Hanoi is 3 hrs, 52 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.