| Idstein to Carpentras | 452.00 mi (727.43 km) |
| Idstein to Carquefou | 488.09 mi (785.51 km) |
| Idstein to Carqueiranne | 503.21 mi (809.84 km) |
| Idstein to Carrieres-sous-Poissy | 292.74 mi (471.12 km) |
| Idstein to Carrieres-sur-Seine | 282.98 mi (455.40 km) |
| Idstein to Carros | 448.41 mi (721.64 km) |
| Idstein to Carvin | 235.05 mi (378.27 km) |
| Idstein to Castanet-Tolosan | 562.58 mi (905.38 km) |
| Idstein to Castelginest | 553.99 mi (891.56 km) |
| Idstein to Castelnau-le-Lez | 499.27 mi (803.49 km) |
| Idstein to Castelnaudary | 562.48 mi (905.23 km) |
| Idstein to Castelsarrasin | 543.41 mi (874.54 km) |
| Idstein to Castres | 538.20 mi (866.16 km) |
| Idstein to Caudebec-les-Elbeuf | 330.10 mi (531.24 km) |
| Idstein to Caudry | 215.24 mi (346.40 km) |
