The total flight time is approximately 18.5 hours to Sydney, depending on layovers, delays and flight conditions, etc.
The average time is 14-15 hours.
8hr 35min Manchester (MAN) to Chicago OHare (ORD) by a nonstop flight operated by American Airlines.
12hr 57min Beijing Capital (PEK) to Chicago OHare (ORD) by a nonstop flight operated by United Airlines.
The flight time from Australia to Zimbabwe is about 12 hours, 43 minutes.
The flight time from Adelaide, Australia to Darwin, Australia is approximately three and a half hours.
Well to Melbourne, Australia the flight is approximately 22-23 hours.
12hr 00min Chicago OHare (ORD) to Amman (AMM) by a nonstop flight operated by Royal Jordanian.
The flight time from Alabama to Australia is approximately 20 hours and 34 minutes. Since you didn't provide a location in Australia, the flight time is from Alabama to the nearest Australian coast. Australia is huge. The exact travel time depends on factors such as weather conditions and delays.
Sydney to Darwin flight time is about 4.1 hoursand The flight distance is 3146 km.
Chicago Ohare to Grand Rapids is about 45 minutes.
The flight time from Tehran, Iran to Australia is 14 hours and 11 minutes.
Flight time from Perth, Western Australia to Penang, Mallaysia