Deluce said the CS100 jet is four times quieter than other jets in production. Vaughan said if they opened the island airport to Porter's Bombardier jets they would have to open it up to other jets.
Deluce said they are seeking to extend the main runway at the airport by 168 meters (184 yards) at each end.
The island airport was once a sleepy airport, but Porter took exclusive control of its takeoff and landing slots in 2006 and has expanded from two planes to 26 now. Many city residents enjoy the airport's proximity to downtown. Toronto's main airport, Pearson International, is just outside the city.
Air Canada, the country's largest airline, said it wants assurance that slots will become available for other airlines on the island before taking a position.
Porter no longer controls all the slots, but it controls most of them. Air Canada currently has only enough landing and takeoff slots to offer service between Montreal and the Toronto island airport.
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