Paris for 31 percent of the GDP of France. According to the Economist Intelligence Unit Worldwide Cost of Living Survey in 2018, Paris was the second-most expensive city in the world, behind Singapore and ahead of Zurich, Hong Kong, Oslo and Geneva. The city is a major rail, highway, and air-transport hub served by two international airports: Paris-Charles de Gaulle (the second busiest airport in Europe after London Heathrow Airport with 69.5 million passengers in 2017) and Paris-Orly. Opened in 1900, the city's subway system, the Paris Métro, serves 5.23 million passengers daily, and is the second busiest metro system in
Châlons Vatry Airport Châlons Vatry Airport Châlons Vatry Airport is a minor international airport serving Châlons-en-Champagne (formerly Châlons-sur-Marne) in northeastern France. It is located southeast of Châlons-en-Champagne, near Vatry, in the Marne department. It opened as Vatry Air Base in 1953 and switched from military to civilian use in 2000. For freight operations, it is marketed as "Vatry Europort" and gave its name to the former communauté de communes de l'Europort. For passenger traffic, it is also unofficially marketed as "Paris-Vatry" or "Paris-Vatry (Disney)", although it is east of downtown Paris and approximately away from Disneyland Paris. Châlons Vatry Airport's origins began in