| Cities | Distance |
|---|---|
| Portici to Orbetello | 196.52 mi (316.27 km) |
| Portici to Oria | 173.95 mi (279.95 km) |
| Portici to Oristano | 309.14 mi (497.52 km) |
| Portici to Orta Nova | 79.63 mi (128.15 km) |
| Portici to Orte | 151.78 mi (244.27 km) |
| Portici to Ortona | 105.78 mi (170.23 km) |
| Portici to Orvieto | 174.41 mi (280.69 km) |
| Portici to Orzinuovi | 386.62 mi (622.21 km) |
| Portici to Osimo | 189.21 mi (304.50 km) |
| Portici to Ospitaletto | 391.38 mi (629.86 km) |
| Portici to Ostuni | 169.73 mi (273.16 km) |
| Portici to Ottaviano | 7.43 mi (11.96 km) |
| Portici to Ovada | 391.20 mi (629.58 km) |
| Portici to Ozieri | 280.02 mi (450.65 km) |
| Portici to Paceco | 218.05 mi (350.91 km) |