"We are looking at changing our terms and conditions to say, for international travelers, that we will ask people to have a vaccination before they can get on the aircraft," Chief Executive Alan Joyce told broadcaster Channel Nine.

"Whether you need that domestically, we will have to see what happens with COVID-19 in the market. But certainly, for international visitors coming out and people leaving the country, we think that's a necessity."

Australia closed its international borders in March during the first wave of the pandemic and currently requires returning travelers from overseas to quarantine for two weeks.

Read also: First 'no-quarantine' flights arrive into Australia as virus cases fall

Australia's Victoria state, meanwhile, the country's virus hotspot, said on Tuesday it had zero active cases of coronavirus for the first time in more than eight months, putting it on track to effectively eliminate the virus.

Australia's second-most populous state reported zero new cases for a 25th straight day, having imposed restrictions on public movement and shut down large parts of the economy after daily infections peaked at more than 700 in early August.

Victoria accounts for more than 73 percent of the country's total virus cases and 90 percent of national deaths. Australia has reported more than 27,800 cases and 907 deaths since the pandemic began. 

Popular

The fragile promise of pluralism, religious freedom in Southeast Asia

Coffee, gold push up inflation to 1.95 percent in April

Power begins to return after outage in Indonesia's Bali island