| Castaic to Idar-Oberstein | 5,746.33 mi (9,247.83 km) |
| Castaic to Idstein | 5,748.68 mi (9,251.61 km) |
| Castaic to Illertissen | 5,906.79 mi (9,506.06 km) |
| Castaic to Illingen | 5,755.58 mi (9,262.72 km) |
| Castaic to Ilmenau | 5,800.23 mi (9,334.56 km) |
| Castaic to Ilsede | 5,696.13 mi (9,167.04 km) |
| Castaic to Ilsenburg | 5,730.95 mi (9,223.07 km) |
| Castaic to Ilsfeld | 5,838.30 mi (9,395.83 km) |
| Castaic to Ilvesheim | 5,796.07 mi (9,327.87 km) |
| Castaic to Immenstadt im Allgau | 5,945.12 mi (9,567.74 km) |
| Castaic to Ingelheim | 5,754.96 mi (9,261.71 km) |
| Castaic to Ingolstadt | 5,917.01 mi (9,522.51 km) |
| Castaic to Iserlohn | 5,671.15 mi (9,126.83 km) |
| Castaic to Isernhagen-Sud | 5,678.39 mi (9,138.49 km) |
| Castaic to Ismaning | 5,952.92 mi (9,580.30 km) |
