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
Pančevo Airport Pančevo Airport Pančevo Airport ("Аеродром Панчево" or "Aerodrom Pančevo") is an airport near the city of Pančevo, Serbia near Belgrade. The airport is mostly used for general aviation operations. It has a single grass runway 1,000 metres long and 60 metres wide. The airport is also used by Utva Aviation Industry, a manufacturer of light sporting and training aircraft also located in Pančevo, for testing its aircraft. On March 15, 1923, aircraft of the Franko-Rumen company started operations from Pančevo airport. A few days later on March 25, services between Paris and Istanbul via Pančevo commenced, the first international flights