| Portici to Castelfidardo | 187.20 mi (301.27 km) |
| Portici to Castelfiorentino | 258.26 mi (415.64 km) |
| Portici to Castelfranco di Sopra | 240.40 mi (386.88 km) |
| Portici to Castelfranco di Sotto | 270.73 mi (435.70 km) |
| Portici to Castelfranco Emilia | 309.74 mi (498.47 km) |
| Portici to Castelfranco Veneto | 356.10 mi (573.09 km) |
| Portici to Castellabate | 49.27 mi (79.29 km) |
| Portici to Castellammare del Golfo | 208.14 mi (334.96 km) |
| Portici to Castellammare di Stabia | 11.30 mi (18.18 km) |
| Portici to Castellamonte | 459.27 mi (739.13 km) |
| Portici to Castellana Grotte | 147.73 mi (237.75 km) |
| Portici to Castellaneta | 136.34 mi (219.41 km) |
| Portici to Castellanza | 429.80 mi (691.69 km) |
| Portici to Castellarano | 315.63 mi (507.96 km) |
| Portici to Castelleone | 386.01 mi (621.22 km) |
