11.7 kilometers. According to the map, the Nanhu No.1 Restaurant in Xi 'an is 11.7 kilometers away from Windham Hotel, which takes 21 minutes. Both of them belong to Xi 'an, Xi 'an for short, and were called Chang 'an and Haojing in ancient times. It is the capital of Shaanxi Province, a sub-provincial city, a megacity, a core city of Guanzhong Plain urban agglomeration, and an important central city in western China as determined by the State Council.