| Gretna to Coudekerque-Branche | 4,741.77 mi (7,631.14 km) |
| Gretna to Coueron | 4,661.88 mi (7,502.57 km) |
| Gretna to Coulommiers | 4,827.94 mi (7,769.82 km) |
| Gretna to Courbevoic | 4,790.89 mi (7,710.20 km) |
| Gretna to Courcouronnes | 4,805.51 mi (7,733.73 km) |
| Gretna to Cournon-d'Auvergne | 4,917.01 mi (7,913.16 km) |
| Gretna to Courrieres | 4,778.90 mi (7,690.90 km) |
| Gretna to Coutras | 4,787.34 mi (7,704.48 km) |
| Gretna to Couzeix | 4,826.69 mi (7,767.81 km) |
| Gretna to Cran-Gevrier | 5,039.42 mi (8,110.16 km) |
| Gretna to Craponne | 4,983.96 mi (8,020.90 km) |
| Gretna to Creil | 4,791.11 mi (7,710.54 km) |
| Gretna to Crepy-en-Valois | 4,808.59 mi (7,738.68 km) |
| Gretna to Crest | 5,026.90 mi (8,090.01 km) |
| Gretna to Creteil | 4,802.51 mi (7,728.90 km) |
