| Portimao to Collegno | 999.38 mi (1,608.35 km) |
| Portimao to Cologno al Serio | 1,107.46 mi (1,782.28 km) |
| Portimao to Cologno Monzese | 1,087.43 mi (1,750.05 km) |
| Portimao to Colorno | 1,119.79 mi (1,802.12 km) |
| Portimao to Comacchio | 1,196.86 mi (1,926.16 km) |
| Portimao to Comiso | 1,272.94 mi (2,048.59 km) |
| Portimao to Como | 1,087.83 mi (1,750.70 km) |
| Portimao to Concordia Sagittaria | 1,252.32 mi (2,015.42 km) |
| Portimao to Concorezzo | 1,091.78 mi (1,757.06 km) |
| Portimao to Conegliano | 1,230.59 mi (1,980.44 km) |
| Portimao to Conselice | 1,176.50 mi (1,893.39 km) |
| Portimao to Conselve | 1,194.72 mi (1,922.72 km) |
| Portimao to Conversano | 1,396.47 mi (2,247.40 km) |
| Portimao to Copertino | 1,444.34 mi (2,324.44 km) |
| Portimao to Copparo | 1,185.21 mi (1,907.41 km) |
