Geneva Airport, formerly and still unofficially known as Cointrin Airport, is an international airport of Geneva, the second most populous city in Switzerland. It is located 4 km (2.5 mi) northwest of the city centre. It surpassed the 15-million-passengers-a-year mark for the first time in December 2014. The airport serves as a hub for Swiss International Air Lines and easyJet Switzerland. It features a route network of flights mainly to European metropolitan and leisure destinations as well as some long-haul routes to North America, China, Africa, and the Middle East, amongst them Swiss International Air Lines' only long-haul service outside of Zürich.