The new airline rivalries: Air Canada vs. Porter, WestJet vs. Flair

In a country traditionally dominated by two national airlines, a new set of aviation rivalries has emerged. Porter is increasingly moving in on Air Canada's home turf of Central Canada as well as cross-country routes, while WestJet seeks to counter the threat of Flair Airlines in a shift from the decades-old industry dynamic of sparring between the two biggest carriers.