| Opatija to Idstein | 438.23 mi (705.27 km) |
| Opatija to Illertissen | 281.88 mi (453.64 km) |
| Opatija to Illingen | 439.11 mi (706.68 km) |
| Opatija to Ilmenau | 401.25 mi (645.75 km) |
| Opatija to Ilsede | 514.17 mi (827.48 km) |
| Opatija to Ilsenburg | 480.56 mi (773.38 km) |
| Opatija to Ilsfeld | 349.37 mi (562.25 km) |
| Opatija to Ilvesheim | 391.77 mi (630.49 km) |
| Opatija to Immenstadt im Allgau | 248.13 mi (399.33 km) |
| Opatija to Ingelheim | 432.46 mi (695.98 km) |
| Opatija to Ingolstadt | 272.86 mi (439.12 km) |
| Opatija to Iserlohn | 516.73 mi (831.59 km) |
| Opatija to Isernhagen-Sud | 530.27 mi (853.39 km) |
| Opatija to Ismaning | 235.37 mi (378.79 km) |
| Opatija to Isny im Allgau | 259.93 mi (418.32 km) |
