108.7 km. According to Baidu map, the distance from Yanmenguan to Xinzhou Ancient City is 108.7 km, and it takes 1 hour and 3 1 minute to drive, passing through Hill Line and Erguang Expressway. You can also take the K603 train at Daixian Station and get off at Xinzhou Station. The whole journey takes 1 hour and 6 minutes.