Flights were delayed and even cancelled at Billy Bishop Toronto City Airport on Sunday due to a flight planning system interruption.

“Everything is operating normally as of now,” said Porter Airlines spokesperson Brad Cicero.

Cicero confirmed there were some delays and cancellations and that it is “best for passengers to check our website about information related to specific flights.

One traveller said her flight was supposed to leave at 8 a.m. for Newark, New Jersey but she has been waiting for over two hours at the airport.

@CityAlanna @CityNews was supposed to leave at 8am for Newark, NJ – so I've been here in the lounge waiting for about 2.5 hours — Jenn (@JennAndTheCity) November 6, 2016

You can visit the website here.