| Greenock to Cortona | 1,146.85 mi (1,845.67 km) |
| Greenock to Cosenza | 1,498.03 mi (2,410.84 km) |
| Greenock to Cossato | 910.24 mi (1,464.88 km) |
| Greenock to Costa Volpino | 949.26 mi (1,527.69 km) |
| Greenock to Creazzo | 1,006.50 mi (1,619.81 km) |
| Greenock to Crema | 963.18 mi (1,550.08 km) |
| Greenock to Cremona | 986.19 mi (1,587.11 km) |
| Greenock to Crevalcore | 1,041.50 mi (1,676.14 km) |
| Greenock to Crispiano | 1,453.22 mi (2,338.74 km) |
| Greenock to Crosia | 1,497.80 mi (2,410.48 km) |
| Greenock to Crotone | 1,535.97 mi (2,471.91 km) |
| Greenock to Cuneo | 964.22 mi (1,551.76 km) |
| Greenock to Cuorgne | 907.01 mi (1,459.69 km) |
| Greenock to Cusano Milanino | 938.85 mi (1,510.93 km) |
| Greenock to Cutro | 1,534.92 mi (2,470.22 km) |
