| Romanshorn to Idar-Oberstein | 175.28 mi (282.08 km) |
| Romanshorn to Idstein | 190.05 mi (305.86 km) |
| Romanshorn to Illertissen | 56.31 mi (90.62 km) |
| Romanshorn to Illingen | 163.78 mi (263.58 km) |
| Romanshorn to Ilmenau | 226.87 mi (365.12 km) |
| Romanshorn to Ilsede | 327.03 mi (526.30 km) |
| Romanshorn to Ilsenburg | 303.16 mi (487.89 km) |
| Romanshorn to Ilsfeld | 102.82 mi (165.48 km) |
| Romanshorn to Ilvesheim | 136.75 mi (220.08 km) |
| Romanshorn to Immenstadt im Allgau | 40.11 mi (64.55 km) |
| Romanshorn to Ingelheim | 176.80 mi (284.53 km) |
| Romanshorn to Ingolstadt | 126.32 mi (203.29 km) |
| Romanshorn to Iserlohn | 274.59 mi (441.91 km) |
| Romanshorn to Isernhagen-Sud | 337.26 mi (542.77 km) |
| Romanshorn to Ismaning | 116.66 mi (187.74 km) |
