| Idil to Coudekerque-Branche | 2,140.11 mi (3,444.17 km) |
| Idil to Coueron | 2,298.53 mi (3,699.13 km) |
| Idil to Coulommiers | 2,085.38 mi (3,356.09 km) |
| Idil to Courbevoic | 2,123.55 mi (3,417.52 km) |
| Idil to Courcouronnes | 2,113.31 mi (3,401.04 km) |
| Idil to Cournon-d'Auvergne | 2,061.41 mi (3,317.51 km) |
| Idil to Courrieres | 2,109.09 mi (3,394.26 km) |
| Idil to Coutras | 2,222.24 mi (3,576.35 km) |
| Idil to Couzeix | 2,155.98 mi (3,469.71 km) |
| Idil to Cran-Gevrier | 1,922.48 mi (3,093.93 km) |
| Idil to Craponne | 1,987.94 mi (3,199.27 km) |
| Idil to Creil | 2,116.44 mi (3,406.09 km) |
| Idil to Crepy-en-Valois | 2,098.16 mi (3,376.66 km) |
| Idil to Crest | 1,969.96 mi (3,170.34 km) |
| Idil to Creteil | 2,113.18 mi (3,400.84 km) |
