| Castalla to Idar-Oberstein | 862.78 mi (1,388.50 km) |
| Castalla to Idstein | 914.96 mi (1,472.49 km) |
| Castalla to Illertissen | 854.55 mi (1,375.27 km) |
| Castalla to Illingen | 836.89 mi (1,346.85 km) |
| Castalla to Ilmenau | 1,008.39 mi (1,622.85 km) |
| Castalla to Ilsede | 1,078.54 mi (1,735.74 km) |
| Castalla to Ilsenburg | 1,067.63 mi (1,718.18 km) |
| Castalla to Ilsfeld | 873.71 mi (1,406.10 km) |
| Castalla to Ilvesheim | 878.99 mi (1,414.59 km) |
| Castalla to Immenstadt im Allgau | 826.63 mi (1,330.34 km) |
| Castalla to Ingelheim | 895.44 mi (1,441.07 km) |
| Castalla to Ingolstadt | 924.39 mi (1,487.66 km) |
| Castalla to Iserlohn | 971.39 mi (1,563.29 km) |
| Castalla to Isernhagen-Sud | 1,080.88 mi (1,739.52 km) |
| Castalla to Ismaning | 906.90 mi (1,459.52 km) |
