Airports in Toronto and Montreal pause departing flights after the FAA declared a nationwide ground stop in the US

Planes at Toronto and Montreal airports are also in a ground stop. Gary Hershorn/Getty Images Two Canadian airports have issued ground stops on Friday. NAV CANADA, the organization that runs Canada's airspace system, said it's to "safely manage traffic." Many airport hubs will take on extra planes as airlines headed to the US divert. Two airports in Canada — Toronto Pearson International Airport and Montréal-Trudeau International Airport— have issued ground stops amid the air traffic control outage in the US . Both airports listed the reason as "other" in the Federal Aviation Administration airspace advisory. Toronto said the "probability of extension is high (greater than 60%)." NAV CANADA, a privately run nonprofit corporation that owns and operates Canada's civil air traffic system, said Friday night that its systems are "operating normally" and that it issued ground stops to "safely manage traffic volumes."