| Greenock to Cividale del Friuli | 1,037.72 mi (1,670.05 km) |
| Greenock to Civita Castellana | 1,214.99 mi (1,955.34 km) |
| Greenock to Civitanova Marche | 1,196.49 mi (1,925.57 km) |
| Greenock to Civitavecchia | 1,209.57 mi (1,946.62 km) |
| Greenock to Civitella in Val di Chiana | 1,131.10 mi (1,820.33 km) |
| Greenock to Clusone | 942.02 mi (1,516.04 km) |
| Greenock to Coccaglio | 960.56 mi (1,545.87 km) |
| Greenock to Codigoro | 1,063.59 mi (1,711.68 km) |
| Greenock to Codogno | 975.45 mi (1,569.84 km) |
| Greenock to Codroipo | 1,030.21 mi (1,657.96 km) |
| Greenock to Cogoleto | 991.45 mi (1,595.58 km) |
| Greenock to Colle di Val d'Elsa | 1,115.73 mi (1,795.60 km) |
| Greenock to Colle Salvetti | 1,086.33 mi (1,748.28 km) |
| Greenock to Collecchio | 1,013.00 mi (1,630.27 km) |
| Greenock to Colleferro | 1,264.57 mi (2,035.13 km) |
