Based at Billy Bishop Toronto City Airport, Porter Airlines is a privately owned regional airline operating a fleet of Bombardier regional aircraft. Its network includes services within Canada and to the United States. In Mar-2020, Porter Airlines announced the suspension of all services from 20-Mar-2020, in order to contain the spread of coronavirus. The carrier previously set multiple resumption dates but had to delay the resumption of operations. Porter Airlines resumed operations after an almost 18 month suspension on 08-Sep-2021.