| Keystone to Coudekerque-Branche | 4,524.39 mi (7,281.31 km) |
| Keystone to Coueron | 4,410.35 mi (7,097.77 km) |
| Keystone to Coulommiers | 4,595.57 mi (7,395.85 km) |
| Keystone to Courbevoic | 4,557.73 mi (7,334.96 km) |
| Keystone to Courcouronnes | 4,570.67 mi (7,355.79 km) |
| Keystone to Cournon-d'Auvergne | 4,663.34 mi (7,504.91 km) |
| Keystone to Courrieres | 4,558.21 mi (7,335.74 km) |
| Keystone to Coutras | 4,523.06 mi (7,279.16 km) |
| Keystone to Couzeix | 4,570.49 mi (7,355.49 km) |
| Keystone to Cran-Gevrier | 4,792.32 mi (7,712.49 km) |
| Keystone to Craponne | 4,733.13 mi (7,617.24 km) |
| Keystone to Creil | 4,560.92 mi (7,340.09 km) |
| Keystone to Crepy-en-Valois | 4,578.90 mi (7,369.02 km) |
| Keystone to Crest | 4,769.82 mi (7,676.29 km) |
| Keystone to Creteil | 4,568.93 mi (7,352.98 km) |
