Air distance from Guam, USA to Zagreb, Croatia is 7276.8 Miles (11710.9 Kilometers / 6319.2 Nautical Miles).
Flight duration time from Guam to Zagreb is 15 hrs, 6 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.