Which Transborder Routes Does Porter Airlines Serve More Than Twice Daily?

Since its foundation in 2006, Porter Airlines has grown to become the third-largest airline in Canada, behind Air Canada and WestJet. Today, the carrier serves more than 30 destinations throughout Canada and the US, with most routes operating from its bases at Billy Bishop Toronto City Airport (YTZ), Toronto Pearson International Airport (YYZ), and Ottawa Macdonald-Cartier International Airport (YOW).