| Gretna to Cividale del Friuli | 5,343.78 mi (8,599.98 km) |
| Gretna to Civita Castellana | 5,432.52 mi (8,742.80 km) |
| Gretna to Civitanova Marche | 5,454.93 mi (8,778.86 km) |
| Gretna to Civitavecchia | 5,412.32 mi (8,710.29 km) |
| Gretna to Civitella in Val di Chiana | 5,363.40 mi (8,631.56 km) |
| Gretna to Clusone | 5,205.05 mi (8,376.72 km) |
| Gretna to Coccaglio | 5,216.67 mi (8,395.42 km) |
| Gretna to Codigoro | 5,332.19 mi (8,581.33 km) |
| Gretna to Codogno | 5,218.10 mi (8,397.73 km) |
| Gretna to Codroipo | 5,329.70 mi (8,577.33 km) |
| Gretna to Cogoleto | 5,197.04 mi (8,363.84 km) |
| Gretna to Colle di Val d'Elsa | 5,338.48 mi (8,591.46 km) |
| Gretna to Colle Salvetti | 5,303.30 mi (8,534.84 km) |
| Gretna to Collecchio | 5,253.56 mi (8,454.79 km) |
| Gretna to Colleferro | 5,479.10 mi (8,817.76 km) |
