GoGet's business rates provide cars for $75 a day for up to 150 kilometres of travel including petrol and insurance, or $6.95 an hour plus 40¢ for every kilometre travelled.

Melbourne's T4 car park, which is opposite the budget airline terminal and a short walk from other terminals, uses machines to scan number plates on exit and entry so drivers do not have to stop and insert parking tickets.

The airport was keen to figure out whether car sharing had a "long term" future at the airport, spokesman Grant Smith said.

"Car sharing has developed a real market for itself, especially in the inner city, so we want to see if that translates into being a viable option out here."

GoGet's brand recognition made it a good choice to trial, Mr Smith said. If demand was strong from GoGet members, the airport would consider adding other car-share operators, he said.

Most of Melbourne Airport's 34 million domestic and international travellers get to and from its terminals in private cars driven by family or friends, with taxis the second most-common mode of transport.

Travellers also have the option of taking the airport's SkyBus, or hire cars and ride-sharing services such as Uber and Go Catch.

Airports have become more accommodating to ride sharing as its popularity grows. Sydney Airport this year introduced dedicated zones at its domestic terminals for ride-sharing pick-ups, but doesn't have any formal arrangements with car-sharing services.

GoGet, which provides cars in Sydney, Brisbane, Canberra and Adelaide as well as Melbourne, hopes to put its vehicles at airports nationwide.

The car-sharing group, which was founded by Western Australian entrepreneurs Bruce Jeffreys and Nic Lowe in Sydney's Newtown in 2003 and is now majority owned by The Growth Fund, has developed partnerships with a broad range of businesses and institutions, including IKEA, Westfield shopping centres, Dexus Property Group and the University of Queensland.