| Castellabate to Navodari | 750.73 mi (1,208.18 km) |
| Castellabate to Negresti-Oas | 671.37 mi (1,080.47 km) |
| Castellabate to Nehoiu | 672.82 mi (1,082.79 km) |
| Castellabate to Ocna Mures | 614.63 mi (989.16 km) |
| Castellabate to Odobesti | 718.69 mi (1,156.62 km) |
| Castellabate to Odorheiu Secuiesc | 665.91 mi (1,071.68 km) |
| Castellabate to Oltenita | 652.72 mi (1,050.45 km) |
| Castellabate to Onesti | 722.74 mi (1,163.13 km) |
| Castellabate to Oradea | 583.92 mi (939.73 km) |
| Castellabate to Orastie | 566.43 mi (911.58 km) |
| Castellabate to Oravita | 474.29 mi (763.29 km) |
| Castellabate to Orsova | 487.64 mi (784.78 km) |
| Castellabate to Otelu Rosu | 520.49 mi (837.65 km) |
| Castellabate to Otopeni | 638.51 mi (1,027.59 km) |
| Castellabate to Ovidiu | 747.18 mi (1,202.46 km) |
