| Portales to Collegno | 5,465.45 mi (8,795.80 km) |
| Portales to Cologno al Serio | 5,524.21 mi (8,890.35 km) |
| Portales to Cologno Monzese | 5,510.79 mi (8,868.77 km) |
| Portales to Colorno | 5,578.45 mi (8,977.64 km) |
| Portales to Comacchio | 5,656.02 mi (9,102.49 km) |
| Portales to Comiso | 6,108.68 mi (9,830.97 km) |
| Portales to Como | 5,491.33 mi (8,837.44 km) |
| Portales to Concordia Sagittaria | 5,631.87 mi (9,063.62 km) |
| Portales to Concorezzo | 5,510.29 mi (8,867.96 km) |
| Portales to Conegliano | 5,606.38 mi (9,022.60 km) |
| Portales to Conselice | 5,651.32 mi (9,094.92 km) |
| Portales to Conselve | 5,620.19 mi (9,044.82 km) |
| Portales to Conversano | 6,014.54 mi (9,679.47 km) |
| Portales to Copertino | 6,083.36 mi (9,790.22 km) |
| Portales to Copparo | 5,634.00 mi (9,067.05 km) |
