Air distance from Guam, USA to Hiroshima, Japan is 1635.9 Miles (2632.8 Kilometers / 1420.6 Nautical Miles).
Flight duration time from Guam to Hiroshima is 3 hrs, 23 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.