The Montreal-Trudeau International Airport said 40 flights were cancelled Saturday as operations resumed after a Federal Aviation Administration (FAA) ground stop temporarily suspended flights on Friday. Airport authorities said airlines resumed flights to the U.S. after the FAA lifted the temporary suspension of flights after 9 p.m. The disruption came after the FAA issued a nationwide ground stop around 4 p.m. for all departing flights in the U.S. on Friday, citing ”extraordinary circumstances and reasons for safety." The ground stop was related to air traffic control communications issues. On Friday, 61 flights were cancelled, including 32 arrivals and 29 departures, as a result of the ground stop. “Aircraft that were unable to land in Montreal yesterday cannot depart today, which explains these cancellations,” a Montreal airport spokesperson told CTV News Saturday. “We encourage travelers to check the status of their flight with their airline before heading to the airport.” Air Canada said on its website that it would take time for operations to fully resume and that additional flights may be affected by delays or cancellations. “If your flight has been canceled, you can check your reservation for the latest information and use our self-service options to review or manage your trip, if necessary,” the Air Canada statement reads.