09/18/2013 06:46 EDT | Updated 11/18/2013 05:12 EST

Porter Airlines Online Service Returning To Normal

Porter Airlines signage is displayed on a wall at Billy Bishop Toronto City Airport in Toronto, Ontario, Canada, on Friday, June 28, 2013. Porter Airlines Inc., the Canadian carrier that now flies only turboprops, plans to add its first jets to start long-haul flights in an expanded challenge to Air Canada and WestJet Airlines Ltd. Photographer: Brent Lewin/Bloomberg via Getty Images

Porter Airlines says its services are coming back online after a computer network outage caused dozens of flight delays and cancellations on Tuesday.

- Porter flights cancelled due to computer outages

Porter flights cancelled due to computer outages

The outage affected the airline's website and call centre Tuesday evening, as well as passenger check-in.

About 40 departures and arrivals were cancelled or delayed.

Officials at Porter, which has its headquarters in Toronto, told CBC News that the cancellations are due to outages affecting their system provider, Navitaire, which manages bookings for several small low-budget airlines.

Navitaire is used by about 50 flight companies around the world, several of which are also experiencing problems.

Just after midnight, Porter tweeted that its services were coming back online, though six flights scheduled for Wednesday were cancelled.

The airline said it isn’t expecting much of a disruption for travellers on Wednesday morning.

Porter is advising passengers to call 1-888-619-8622 on Wednesday morning to find out the status of their flights.

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