Airport rail link Airport), Brussels National Airport railway station (which opened in 1958 and serves Brussels Airport) and Frankfurt Airport regional station (which opened in 1972 and is one of the two railway stations that serve Frankfurt Airport). Integration with intercity services has produced alliances where airlines sell air tickets that include the connecting rail service. Central Europe has seen integration of high-speed rail into airports, with domestic and international TGV and ICE services from Charles de Gaulle Airport in Paris and Frankfurt Airport. Because of this, many airport railway stations have received IATA codes. Yet another option for airports is to use
Paris suburbs of Paris, opened to commercial traffic in 1974 and became the busiest Parisian airport in 1993. For the year 2017 it was the 5th busiest airport in the world by international traffic and it is the hub for the nation's flag carrier Air France. Beauvais-Tillé Airport, located north of Paris's city centre, is used by charter airlines and low-cost carriers such as Ryanair. Domestically, air travel between Paris and some of France's largest cities such as Lyon, Marseille, or Strasbourg has been in a large measure replaced by high-speed rail due to the opening of several high-speed TGV rail