Canada's sixth-busiest airport, Ottawa Macdonald–Cartier International Airport (YOW) handled about 4.6 million passengers in 2014. The airport, which is about six miles south of downtown, serves as a hub for Air Canada and Porter Airlines. Other carriers operating at the airport include Air Transat, Sunwing Airlines, United Express and WestJet. Non-stop flights are available between YOW and points across Canada, the United States, Mexico, the Caribbean and Europe. The airport has three runways and one commercial passenger terminal. Ground transportation options include rental cars, taxis, limousines and the local public transit.