Sales had been suspended until October this year, after the airline giant's chief executive Alan Joyce said it was unlikely worldwide travel would go ahead at all this year.
The airline has been running very limited global flights, mainly to aid the Federal Government with bringing back Australian citizens stuck overseas during the COVID-19 pandemic.
Qantas has reopened ticket sales across its worldwide networks from July 1, in a show of optimism that the vaccine rollout will restart global travel.
"Recently we have aligned the selling of our global services to reflect our expectation that worldwide travel will begin to restart from July 2021", Qantas spokesperson told Bloomberg.
As of Tuesday, New Zealand remains the only overseas country Qantas is still flying to, after a one-way bubble was set up past year.
Qantas had previously suspended bookings to London and the United States until October, but has now scheduled flights to these destinations from July, showing optimism Covid-19 vaccines will be rolled out widely enough over the next six months to restart overseas travel.
They were initially set to resume in March, but travel bubbles with those countries now seems very unlikely.
On January 5, 2021, Deputy Prime Minister and Minister of Transport and Regional Development Michael McCormack said that "the decisions about when global travel resumes will be made by Australian Government".
Would you take the Covid vaccine if it meant you could travel internationally sooner?
"International borders will be opened when worldwide arrivals do not pose a risk to Australians", McCormack said in a statement.
It is expected flights to Asian destinations, including Singapore, Hong Kong and Japan, will also resume on July 1.
He added that the Australian Government is working on travel arrangements with countries, such as New Zealand, that have low community infections.
On the first Monday of 2021, the United Kingdom administered the globe's first shots of COVID-19 vaccine created by pharmaceutical giant AstraZeneca and Oxford University, and the United States last month approved the use of Pfizer's vaccine.
The Australian government is yet to comment on whether mandatory hotel quarantine protocols will be lifted, even if recreational worldwide travel resumes.