| Sankt Gallen to Idar-Oberstein | 183.90 mi (295.96 km) |
| Sankt Gallen to Idstein | 199.54 mi (321.13 km) |
| Sankt Gallen to Illertissen | 63.96 mi (102.93 km) |
| Sankt Gallen to Illingen | 171.75 mi (276.40 km) |
| Sankt Gallen to Ilmenau | 235.87 mi (379.60 km) |
| Sankt Gallen to Ilsede | 336.53 mi (541.59 km) |
| Sankt Gallen to Ilsenburg | 312.50 mi (502.92 km) |
| Sankt Gallen to Ilsfeld | 112.47 mi (181.00 km) |
| Sankt Gallen to Ilvesheim | 146.23 mi (235.34 km) |
| Sankt Gallen to Immenstadt im Allgau | 40.70 mi (65.50 km) |
| Sankt Gallen to Ingelheim | 186.13 mi (299.55 km) |
| Sankt Gallen to Ingolstadt | 132.45 mi (213.15 km) |
| Sankt Gallen to Iserlohn | 284.05 mi (457.14 km) |
| Sankt Gallen to Isernhagen-Sud | 346.83 mi (558.17 km) |
| Sankt Gallen to Ismaning | 120.30 mi (193.60 km) |
