Air passengers face another day of uncertainty as carriers decide whether they can fly amid ongoing calamitous weather in Queensland and New South Wales.
Australia's major airline, Qantas, says its services are expected to return to normal on Tuesday, but passengers would need to check the status of their flights online.
"We are working to get customers who were on cancelled flights [on Monday] to their destination," a spokesman said.
Qantas and Jetstar had added extra services, he said, and Qantas was trying to see if it could replace aircraft with larger planes, to carry more passengers.
The spokesman added that Qantas had offered support to the Queensland government to help with the recovery effort, "particularly in and out of regional communities like Bundaberg".
Virgin Australia has cancelled several flights to and from NSW and Queensland, including between Sydney and Melbourne, Melbourne and Brisbane, Sydney and Brisbane and Sydney and Canberra.
It has advised passengers that if their flight has been cancelled, they should have received an SMS to say so.
A full list of cancellations is available on the airline's website.
Some passengers whose flights were cancelled have reported that even if their flights resumed, they could not fly out because they are trapped in towns where flood waters are impassable.
Jetstar has advised its passengers that while airports were open, it was monitoring the weather to see if flights would be cancelled. It says passengers on cancelled flights should receive text messages about the status of their flights.
Jetstar said it was running flights to Brisbane, the Gold Coast, the Sunshine Coast and Sydney.
On Monday, it cancelled most of its flights to and from the Gold Coast and Ballina, as well as to and from Melbourne, Brisbane and Sydney, a spokesman said.
The airline added 15 extra services on Tuesday to help more than 2000 passengers.