It's the first step in a long process that could eventually see the O-Train extended to Riverside South.
At its Wednesday meeting, the transportation committee approved a study for the proposal, as is the case for transportation projects.
The project calls for an extra eight kilometres of track and five more stations to be located at
Gladstone, Walkley, South Keys, Leitrim and Bowesville Road.
The city won't be paying for the entire cost of the study. The Airport Authority will pick up half of the tab for the review of linking the O-Train to the airport.
Mayor Jim Watson and other senior officials had initially argued that running the train to the airport would slow down regular service, but relented after airport officials cried foul.
It's not yet known how much the study will cost taxpayers. The city will soon open up a competitive process and companies will be able to submit their bids.