| Portici to Collegno | 451.08 mi (725.94 km) |
| Portici to Cologno al Serio | 403.53 mi (649.42 km) |
| Portici to Cologno Monzese | 413.26 mi (665.07 km) |
| Portici to Colorno | 347.67 mi (559.51 km) |
| Portici to Comacchio | 289.56 mi (466.00 km) |
| Portici to Comiso | 267.73 mi (430.87 km) |
| Portici to Como | 434.17 mi (698.73 km) |
| Portici to Concordia Sagittaria | 349.91 mi (563.13 km) |
| Portici to Concorezzo | 414.74 mi (667.46 km) |
| Portici to Conegliano | 364.81 mi (587.11 km) |
| Portici to Conselice | 285.41 mi (459.32 km) |
| Portici to Conselve | 329.52 mi (530.32 km) |
| Portici to Conversano | 145.32 mi (233.87 km) |
| Portici to Copertino | 198.43 mi (319.35 km) |
| Portici to Copparo | 309.17 mi (497.56 km) |
