| Gretna to Cognac | 4,761.44 mi (7,662.80 km) |
| Gretna to Cogolin | 5,138.92 mi (8,270.29 km) |
| Gretna to Colmar | 5,027.20 mi (8,090.49 km) |
| Gretna to Colombes | 4,790.18 mi (7,709.05 km) |
| Gretna to Colomiers | 4,892.27 mi (7,873.35 km) |
| Gretna to Combs-la-Ville | 4,809.81 mi (7,740.63 km) |
| Gretna to Comines | 4,773.48 mi (7,682.18 km) |
| Gretna to Compiegne | 4,801.14 mi (7,726.69 km) |
| Gretna to Concarneau | 4,550.13 mi (7,322.72 km) |
| Gretna to Conde-sur-l'Escaut | 4,805.31 mi (7,733.40 km) |
| Gretna to Conflans-Sainte-Honorine | 4,781.75 mi (7,695.48 km) |
| Gretna to Corbas | 4,994.02 mi (8,037.09 km) |
| Gretna to Corbeil-Essonnes | 4,808.00 mi (7,737.73 km) |
| Gretna to Cormeilles-en-Parisis | 4,786.73 mi (7,703.50 km) |
| Gretna to Cosne sur Loire | 4,859.14 mi (7,820.03 km) |
