| Romanshorn to Imola | 249.04 mi (400.78 km) |
| Romanshorn to Impruneta | 283.26 mi (455.86 km) |
| Romanshorn to Induno Olona | 120.96 mi (194.66 km) |
| Romanshorn to Inverigo | 126.63 mi (203.79 km) |
| Romanshorn to Inveruno | 143.45 mi (230.86 km) |
| Romanshorn to Inzago | 140.40 mi (225.96 km) |
| Romanshorn to Iseo | 135.71 mi (218.40 km) |
| Romanshorn to Isernia | 476.60 mi (767.01 km) |
| Romanshorn to Isola Capo Rizzuto | 709.89 mi (1,142.45 km) |
| Romanshorn to Isola del Liri | 456.20 mi (734.19 km) |
| Romanshorn to Isola della Scala | 177.02 mi (284.88 km) |
| Romanshorn to Isola Vicentina | 166.31 mi (267.66 km) |
| Romanshorn to Ispica | 796.56 mi (1,281.94 km) |
| Romanshorn to Istrana | 183.90 mi (295.95 km) |
| Romanshorn to Itri | 480.20 mi (772.81 km) |
