| Idil to Cognac | 2,231.41 mi (3,591.11 km) |
| Idil to Cogolin | 1,892.94 mi (3,046.39 km) |
| Idil to Colmar | 1,884.11 mi (3,032.18 km) |
| Idil to Colombes | 2,123.81 mi (3,417.94 km) |
| Idil to Colomiers | 2,152.95 mi (3,464.84 km) |
| Idil to Combs-la-Ville | 2,107.77 mi (3,392.13 km) |
| Idil to Comines | 2,110.32 mi (3,396.23 km) |
| Idil to Compiegne | 2,102.83 mi (3,384.18 km) |
| Idil to Concarneau | 2,401.55 mi (3,864.92 km) |
| Idil to Conde-sur-l'Escaut | 2,081.16 mi (3,349.30 km) |
| Idil to Conflans-Sainte-Honorine | 2,131.38 mi (3,430.12 km) |
| Idil to Corbas | 1,979.00 mi (3,184.89 km) |
| Idil to Corbeil-Essonnes | 2,110.84 mi (3,397.07 km) |
| Idil to Cormeilles-en-Parisis | 2,126.53 mi (3,422.31 km) |
| Idil to Cosne sur Loire | 2,081.88 mi (3,350.46 km) |
