Sion Airport alternate airfield for the Air Force. Sion Airport Sion Airport (Military: LSMS) is the airport of the city of Sion, Switzerland and is located 2.5 km southwest of Sion city in the Rhone Valley. The airport opened in 1935. The following airlines offer seasonal and charter flights at Sion Airport: The nearest larger international airport is Geneva Airport, approx. to the west, while the smaller Bern Airport is equidistant to the north. The Swiss Air Force uses Sion as one of their four jetfighter air bases, the others being Payerne, Meiringen and Emmen. It is known as "Flugplatzkommando 14 Sion".
Sion, Switzerland the "Bibliothèque municipale de Sion", the "HES-SO Valais Médiathèque santé-social" and the "HES-SO Valais, Domaine Sciences de l'ingénieur". There was a combined total () of 690,513 books or other media in the libraries, and in the same year a total of 294,320 items were loaned out. Sion has two high schools (colleges) Sion is also host to the : The HES-SO Valais offers education in Sciences, Engineering, Economics, Information Technology and Health Sciences. Sion is situated on the main railway line and the motorway, and also has an airport (Sion Airport). From the , 21,220 or 78.1% were Roman Catholic,