| Somain to Coudekerque-Branche | 60.35 mi (97.12 km) |
| Somain to Coueron | 314.51 mi (506.15 km) |
| Somain to Coulommiers | 106.90 mi (172.04 km) |
| Somain to Courbevoic | 110.84 mi (178.37 km) |
| Somain to Courcouronnes | 125.72 mi (202.32 km) |
| Somain to Cournon-d'Auvergne | 318.91 mi (513.24 km) |
| Somain to Courrieres | 16.23 mi (26.12 km) |
| Somain to Coutras | 399.99 mi (643.72 km) |
| Somain to Couzeix | 323.61 mi (520.79 km) |
| Somain to Cran-Gevrier | 334.09 mi (537.66 km) |
| Somain to Craponne | 325.55 mi (523.92 km) |
| Somain to Creil | 83.85 mi (134.94 km) |
| Somain to Crepy-en-Valois | 79.55 mi (128.03 km) |
| Somain to Crest | 397.30 mi (639.40 km) |
| Somain to Creteil | 114.26 mi (183.88 km) |
