| Casper to Idar-Oberstein | 4,892.88 mi (7,874.34 km) |
| Casper to Idstein | 4,898.31 mi (7,883.07 km) |
| Casper to Illertissen | 5,054.55 mi (8,134.51 km) |
| Casper to Illingen | 4,900.83 mi (7,887.12 km) |
| Casper to Ilmenau | 4,956.34 mi (7,976.46 km) |
| Casper to Ilsede | 4,855.46 mi (7,814.11 km) |
| Casper to Ilsenburg | 4,890.09 mi (7,869.84 km) |
| Casper to Ilsfeld | 4,986.63 mi (8,025.21 km) |
| Casper to Ilvesheim | 4,944.25 mi (7,957.00 km) |
| Casper to Immenstadt im Allgau | 5,091.51 mi (8,193.99 km) |
| Casper to Ingelheim | 4,903.53 mi (7,891.47 km) |
| Casper to Ingolstadt | 5,068.82 mi (8,157.47 km) |
| Casper to Iserlohn | 4,822.89 mi (7,761.69 km) |
| Casper to Isernhagen-Sud | 4,837.56 mi (7,785.31 km) |
| Casper to Ismaning | 5,103.81 mi (8,213.79 km) |
