| Grottammare to Coudekerque-Branche | 773.21 mi (1,244.35 km) |
| Grottammare to Coueron | 812.63 mi (1,307.80 km) |
| Grottammare to Coulommiers | 655.29 mi (1,054.59 km) |
| Grottammare to Courbevoic | 690.08 mi (1,110.58 km) |
| Grottammare to Courcouronnes | 673.35 mi (1,083.66 km) |
| Grottammare to Cournon-d'Auvergne | 559.70 mi (900.75 km) |
| Grottammare to Courrieres | 729.13 mi (1,173.42 km) |
| Grottammare to Coutras | 708.72 mi (1,140.57 km) |
| Grottammare to Couzeix | 653.30 mi (1,051.39 km) |
| Grottammare to Cran-Gevrier | 432.30 mi (695.72 km) |
| Grottammare to Craponne | 489.70 mi (788.09 km) |
| Grottammare to Creil | 694.95 mi (1,118.41 km) |
| Grottammare to Crepy-en-Valois | 679.03 mi (1,092.79 km) |
| Grottammare to Crest | 456.40 mi (734.51 km) |
| Grottammare to Creteil | 678.09 mi (1,091.28 km) |
