Porter Airlines is a Canadian airline headquartered at Billy Bishop Toronto City Airport in Toronto. It is the third largest airline in Canada, behind Air Canada and WestJet. Owned by Porter Aviation Holdings, formerly known as REGCO Holdings Inc., Porter operates regularly scheduled flights from its bases in Eastern Canada, primarily Ottawa, Toronto–Billy Bishop and Toronto–Pearson airports, to locations across North America using a fleet of De Havilland Canada DHC-8-400 turboprop and Embraer 195-E2 jet aircraft.
SOURCE: Wikipedia