| Greenock to Collegno | 923.41 mi (1,486.09 km) |
| Greenock to Cologno al Serio | 951.50 mi (1,531.29 km) |
| Greenock to Cologno Monzese | 942.70 mi (1,517.13 km) |
| Greenock to Colorno | 1,007.36 mi (1,621.19 km) |
| Greenock to Comacchio | 1,072.88 mi (1,726.63 km) |
| Greenock to Comiso | 1,592.20 mi (2,562.39 km) |
| Greenock to Como | 921.46 mi (1,482.94 km) |
| Greenock to Concordia Sagittaria | 1,036.29 mi (1,667.74 km) |
| Greenock to Concorezzo | 940.86 mi (1,514.18 km) |
| Greenock to Conegliano | 1,012.65 mi (1,629.70 km) |
| Greenock to Conselice | 1,072.58 mi (1,726.15 km) |
| Greenock to Conselve | 1,034.30 mi (1,664.55 km) |
| Greenock to Conversano | 1,429.14 mi (2,299.98 km) |
| Greenock to Copertino | 1,497.06 mi (2,409.28 km) |
| Greenock to Copparo | 1,051.46 mi (1,692.17 km) |
