Depends on when you're leaving. If you leave tomorrow you're looking at about 30 hours. Lots of lay overs and whatnot.
The flight time from Tehran, Iran to Adelaide, Australia is 15 hours, 21 minutes.
A typical flight between Kuala Lumpur, Malaysia and Adelaide, Australia would have a flying time of about 7 hours, 6 minutes.
A typical flight between Atlanta, GA and Brisbane, Australia would have a flying time of about 18 hours, 5 minutes.
A flight from Heathrow to Adelaide would take about 21 hours.
26hours
About 4 hours.
3 hrs
2 hours
14 hours
About 4 hours.
14 hours
The flight is just over an hour long in actual time (remember that Melbourne is half an hour ahead of Adelaide's time.)