Gert-Jan de Graaff's warning came as the business reported a 25 per cent decrease in people travelling through the airport during the last financial year.

The business is seeking suggestions from Queenslanders, Traditional Owners, airlines, schools and community groups for what items to include.

Brisbane Airport’s new flightpaths will come into effect from 21 May in preparation for the opening of its new $1.1 billion runway on 12 July.

It cost more than a $1 billion, was in construction for eight years and took the collective effort of 3,700 people and 3.3 million manhours – but yesterday work finished on Brisbane’s new runway under the eerie quiet of a coronavirus lockdown.