| Idstein to Cognac | 505.62 mi (813.72 km) |
| Idstein to Cogolin | 488.44 mi (786.07 km) |
| Idstein to Colmar | 153.50 mi (247.03 km) |
| Idstein to Colombes | 284.22 mi (457.41 km) |
| Idstein to Colomiers | 561.23 mi (903.21 km) |
| Idstein to Combs-la-Ville | 278.06 mi (447.50 km) |
| Idstein to Comines | 234.44 mi (377.29 km) |
| Idstein to Compiegne | 249.24 mi (401.12 km) |
| Idstein to Concarneau | 574.70 mi (924.90 km) |
| Idstein to Conde-sur-l'Escaut | 207.13 mi (333.34 km) |
| Idstein to Conflans-Sainte-Honorine | 289.00 mi (465.10 km) |
| Idstein to Corbas | 351.05 mi (564.96 km) |
| Idstein to Corbeil-Essonnes | 282.93 mi (455.33 km) |
| Idstein to Cormeilles-en-Parisis | 285.18 mi (458.95 km) |
| Idstein to Cosne sur Loire | 311.21 mi (500.84 km) |
