Air distance from Knoxville, USA to Brisbane, Australia is 9096.9 Miles (14640 Kilometers / 7899.7 Nautical Miles).
18 hrs, 53 mins is the flight duration between Knoxville and Brisbane. 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.