Canada’s largest airport lost $383 million last year as the number of passengers plunged nearly 74 per cent from 2019 due to the COVID-19 pandemic.The Greater Toronto Airports Authority says its net loss compared with a $139.8-million profit in 2019 as revenues decreased nearly by half to $823.5 million, from $1.5 billion a year earlier.More than 13 million passengers passed through the airport in 2020, including 5.5 million on domestic flights and 7.8 million for international service.That was down from 50.5 million, including 18.1 million within Canada and 32.4 million between Canada and the U.S.