Air distance from Patna, India to Sydney, Australia is 5943.7 Miles (9565.4 Kilometers / 5161.5 Nautical Miles).
12 hrs, 20 mins is the flight duration between Patna and Sydney. 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.