Porter Airlines wants to fly jets in and out of the airport, a move that would require significant upgrades.
The executive committee was voting on a staff report asking council to delay a final decision on the plan until 2015. It says more study of the plan is required.
The committee will come back to the issue in January.
Porter Airlines has sought to extend the length of both ends of the island airport, so that it would be suitable for landing jets. But the airline needs to get the approval of the city, the port authority and Transport Canada to make this happen.