Sion Airport 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.
Wikipedia https://en.wikipedia.org/wiki/Sion_Airport
Address Chemin Lambien, Sion 1950, Switzerland
Coordinates 46°13'9.914" N 7°19'47.999" E