TORONTO — Air Canada has issued travel alerts for March 13 and March 14 for more than a dozen Canadian and U.S. cities impacted by the incoming winter storm as it works through the last of the delays caused by yesterday’s system-wide computer outage.

Yesterday afternoon Air Canada reported that its system was back up and running but was still advising passengers that they may experience flight delays.

The airline sent out a tweet at 2 p.m. on March 12: “We can confirm airport systems, check-in & customer call centres are now all back online. We’re expecting some flight delays but we’re getting everyone on their way. Please check your flight status before going to the airport. We thank customers for their patience.”

The system-wide outage prompted reports of long lines at several airports across the country, with manual check-ins as airline staff had to work around the IT glitch.

The latest advisory issued by Air Canada yesterday afternoon at just after 3 p.m. advised passengers to check-in online to save time at airport.

Air Canada says it has also invoked its rebooking policy to allow passengers to rebook without change fees on a space available basis.

“The computer and telecommunications issues affecting our operations have been resolved and we apologize for any inconvenience this situation has caused. We appreciate our customers’ patience and we have arranged additional staffing to get our customers on their way as soon as possible,” said Benjamin Smith, President, Passenger Airlines at Air Canada.

Meanwhile Air Canada’s travel alerts due to the incoming Nor’easter cover some 16 cities including New York, Boston, Halifax and Toronto.