The flight time would be around 2 hours.
A flight from Darwin, Australia to Cairns, Australia is 2 hours.
About 2 hours.
2.5 hours
The driving distance from Darwin to Cairns is 2853 kilometres
About 17 hours.
3 hrs
Without stopping for supplies around 890NM from Darwin to cairns
It will take about 50 minutes.
4 hours 30 mins
17 hours 1 minute
You cannot travel from Cairns to Darwin on the Ghan. You would have to travel from Cairns down to Brisbane, where you would then need to take another train to Sydney. At Sydney you could catch a train to Adelaide, and only at Adelaide could you catch the Ghan to Darwin. Total travel would be about five days.
The flight time is approximately 5 hours, 38 minutes.