Air Canada's airport systems, check-in and call centres are now "beginning to come back online" after a prolonged technical problem caused dozens of flight delays and cancellations. Airline authorities became aware of the massive Air Canada glitch on Tuesday night. Air Canada passengers were frustrated to learn that the system-wide technical problem would continue to affect flights into Wednesday.\nThe airline states that even though the system issue is in the midst of being resolved, travellers may still encounter delays and cancellations.\n"We intend to operate our full schedule today plus five extra flights and some upgauged flights (larger than normal aircraft) in order to move customers affected last night," Air Canada spokesperson Peter Fitzpatrick wrote in an email to CBC News this morning.\n"There were a small number of flights cancelled this morning due to aircraft being out of position this morning due to last night's cancellations, but overall we are anticipating a normal day."\nHundreds of Air Canada passengers are lining up to reschedule flights & get more info after a system-wide technical glitch caused delays and cancellations. #yvr pic.twitter.com/fZNBpZdKTp— Angela Jung (@AngelaJungCTV) May 29, 2019\nAir Canada passengers documented the chaos on social media, reporting that they were stranded in cities across North America. Just prior to 10:30 PM last night, Air Canada tweeted that the airline was working to resolve the issue. Finally, several hours later, it was confirmed that the systems were coming back online.\nAir Canada says its systems are restored after an earlier outage but my personal experience at LaGuardia tells me that’s not the case. No self serve kiosks, unmoving lines & no bag drop for customers on the 8:40 flight to Toronto until the 8:30 to Montreal is done. #TicTocNews pic.twitter.com/jR0OpM7loJ— Anne Riley Moffat (@A_Riley17) May 29, 2019\nA statement from Air Canada to CBC News explained, "We're still expecting some flight delays and cancellations, but we are working hard to move as many customers as possible this evening and we are putting on additional capacity to transport customers affected tonight on flights tomorrow."\n1/2 We can confirm airport systems, check-in and customer call centres are beginning to come back online. We’re still expecting some flight delays and cancellations, but we are working hard to move as many customers as possible this evening and we are putting on additional... pic.twitter.com/j2dSHLselE— Air Canada (@AirCanada) May 29, 2019\n2/2 capacity to transport customers affected tonight on flights tomorrow. Customers should check their flight's status before going to the airport. We thank our customers for their patience and apologize for the inconvenience.— Air Canada (@AirCanada) May 29, 2019\nAccording to Robin Smith, a spokesperson for the Greater Toronto Airports Authority, the technical glitch shut down the system from approximately 9 PM on Tuesday to 12:20 AM on Wednesday. Smith also explained that the GTAA temporary removed the nighttime flying restrictions for Air Canada flights that had been delayed due to the technical issue.\nCTV News points out that as many as two dozen Air Canada flights were affected by the technical glitch at Toronto's airport. Air Canada flights out of Calgary, Vancouver and New York's LaGuardia Airport were delayed as well.\nAir Canada recommends that all travellers monitor the status of their flight before they make their way to the airport. The airline also apologized for the inconvenience.