Aosta Corrado Gex Airport — Saint-Christophe (AO), Italy

Tucked into Italy's mountainous Aosta Valley near the French and Swiss borders, Aosta Corrado Gex Airport sits in Saint-Christophe just outside the city of Aosta. Identified by the code AOT, the field climbs to 1,791 feet, among the higher-altitude airports in northern Italy, and its lone runway was laid along the narrow valley floor rather than sized for heavy traffic. Corrado Gex, a historical figure tied to the Aosta Valley, lent his name to the airport. Surrounded by Alpine peaks, AOT mainly handles general aviation and seasonal flights connected to the mountain tourism and ski resorts scattered throughout the surrounding valley.