City of Derry Airport could become a "severe financial risk" within months, Derry City and Strabane District Council has warned.
That is if funding cannot be secured from Stormont, officials have said.
A request for money was sent to the NI Executive in a business case in May, but so far the council has said no money has been agreed.
Council has requested £15m, spread over six years, to help maintain the commercial viability of the airport.
A report given to councillors pointed out that this £15m would bring a potential saving of £3.5m per year for the council, which owns the airport.