Incoming and departing flights at Toronto's Pearson International Airport appear to be back on schedule this morning after a computer glitch caused several delays and cancellations the night before.

Nav Canada, a national body that provides air traffic control and flight information, said Friday the glitch has been fixed.

Spokesman Ron Singer said there were significant delays for flights leaving Pearson, and cancellations and delays for incoming flights Thursday night following a flight planning computer problem. The airport had to manually process planes while the system was down.

Singer stressed Thursday that the flight planning system problem did not affect the safe operation of the air traffic control system at the airport.

By early Friday, only a small number of delays and cancellations were listed on the Pearson airport website, and the bulk of those were due to poor weather in Newfoundland and the upper U.S. Midwest.

Nav Canada said it regretted the inconvenience and disruptions to airlines and passengers.