Porter Airlines has cancelled more than 15 flights on Friday night due to a software malfunction. 

Porter was forced to cancel or delay dozens of flights due to "prolonged systems outages," the Billy Bishop Toronto City Airport-based airline said. The issues come on the same night as Pearson International Airport has seen dozens of flight interruptions due to a major blizzard slamming the southern and eastern U.S.

Air Canada flights from the downtown island airport are not affected by the computer issues.

"Porter Airlines is cancelling a portion of its remaining flights for January 22, 2016, due to prolonged systems outages," the airline said in a statement released around 7:20 p.m.

"Passengers will be rebooked on flights as soon as tomorrow based on availability."

Porter said the computer issues stem from software provided by a third-party.

The problems are also hampering the airline's booking system.

Anyone seeking more information is advised to contact the airline's call centre at: 1-866-619-8622.