Toronto's Port Authority is seeking up to $100 million in federal money to pay for infrastructure improvements at the Billy Bishop Toronto City Airport.

The port authority has presented a preliminary estimate for improvements related to airport access and related vehicle traffic to the federal Building Canada Fund, on behalf of the City of Toronto.

Although the TPA is a self-funding federal agency its chairman, Mark McQueen, says its financial resources can't cover the cost of a proposed runway extension and normal spending requirements.

The runway extension is part of a controversial proposal from Porter Airlines. The company wants to begin using Bombardier CSeries jets at the airport.

The port authority says it's been asked by city staff to attend a public meeting on Monday as part of a series of public consultations on Porter's request.