Sydney Kingsford Smith International Airport to Cleveland Hopkins International Airport
Approx. 15349 km - about 17h 08m in the air and 18h 26m total from gate to gate, at an average speed around 895 km/h.
Real-world flights on routes this long almost always include at least one stop. Use this nonstop estimate as a guide, and allow extra time for connections and layovers when planning your trip.