Sondalo is a comune in the Province of Sondrio in the Italian region Lombardy, located about 130 kilometres northeast of Milan and abou…Sondalo is a comune in the Province of Sondrio in the Italian region Lombardy, located about 130 kilometres northeast of Milan and about 40 kilometres northeast of Sondrio. Sondalo borders the following municipalities: Grosio, Ponte di Legno, Valdisotto, Valfurva, and Vezza d'Oglio.