In a statement, the panel said the main obstacles that faced international travel recovery include border closures and travel restrictions, along with slow containment of the virus and shaky traveller confidence.
With a third wave sweeping the US, which now has 8.7 million confirmed Covid-19 cases, and Russia, France, Spain and Argentina recording one million cases, with the United Kingdom not far behind, one in five experts say 2022 is a more accurate timeline for any international travel recovery.
Last week, Qantas CEO Alan Joyce and chairman Richard Goyder revealed it will be unlikely for Australians to fly to the US or the UK with the airline for at least another year, with Joyce pointing to a possibility "by the end of 2021".
"For some of our big destination like the United States and the UK, it's going to need a vaccine given the high prevalence of the virus in both of those locations," he said at the company's AGM in Sydney on Friday.
"But we are getting more and more confident about the opportunities and the potential for a vaccine in helping getting those operations up by potentially by the end of 2021."