All passengers, excluding children aged 12 and under or people with particular exemptions, as well as air crew must now wear masks on domestic flights.

Mask wearing is mandatory in all domestic airports as an additional measure to prevent geographical spread of COVID-19.

Passengers at Port Macquarie Airport have given the thumbs up to wearing face masks on flights.

Perth resident Jim Henry said if wearing face masks helped stop community transmission of COVID-19, it was definitely worth it.

Mr Henry wore a face mask while travelling by train from Sydney to Kempsey just before Christmas, and arrived at Port Macquarie Airport recently with a supply of face masks ready to go.

"If you are going into an enclosed building or on a plane or train, then definitely [wear a mask]," he said.

Sydneysider Jennifer Bennett has no qualms about wearing a face mask on flights.

She wore face masks on domestic flights even before the measure became mandatory.

"I think it is the right thing to do," Ms Bennett said.

National Cabinet recently addressed the issue when it considered domestic and international aviation measures as part of Australia's COVID-19 response.

Wearing a mask helps to reduce community transmission of the virus.

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