| Gretna to Cortona | 5,380.08 mi (8,658.40 km) |
| Gretna to Cosenza | 5,712.08 mi (9,192.71 km) |
| Gretna to Cossato | 5,138.90 mi (8,270.26 km) |
| Gretna to Costa Volpino | 5,213.10 mi (8,389.67 km) |
| Gretna to Creazzo | 5,281.58 mi (8,499.88 km) |
| Gretna to Crema | 5,210.46 mi (8,385.42 km) |
| Gretna to Cremona | 5,233.08 mi (8,421.82 km) |
| Gretna to Crevalcore | 5,294.82 mi (8,521.18 km) |
| Gretna to Crispiano | 5,706.47 mi (9,183.68 km) |
| Gretna to Crosia | 5,725.11 mi (9,213.67 km) |
| Gretna to Crotone | 5,759.10 mi (9,268.38 km) |
| Gretna to Cuneo | 5,149.13 mi (8,286.73 km) |
| Gretna to Cuorgne | 5,122.09 mi (8,243.21 km) |
| Gretna to Cusano Milanino | 5,183.12 mi (8,341.42 km) |
| Gretna to Cutro | 5,755.02 mi (9,261.82 km) |
