| Castellaneta to Navodari | 646.69 mi (1,040.74 km) |
| Castellaneta to Negresti-Oas | 593.78 mi (955.60 km) |
| Castellaneta to Nehoiu | 574.43 mi (924.46 km) |
| Castellaneta to Ocna Mures | 527.48 mi (848.89 km) |
| Castellaneta to Odobesti | 620.76 mi (999.02 km) |
| Castellaneta to Odorheiu Secuiesc | 573.96 mi (923.70 km) |
| Castellaneta to Oltenita | 549.39 mi (884.16 km) |
| Castellaneta to Onesti | 627.30 mi (1,009.54 km) |
| Castellaneta to Oradea | 509.33 mi (819.69 km) |
| Castellaneta to Orastie | 478.65 mi (770.32 km) |
| Castellaneta to Oravita | 388.03 mi (624.47 km) |
| Castellaneta to Orsova | 395.97 mi (637.24 km) |
| Castellaneta to Otelu Rosu | 434.23 mi (698.83 km) |
| Castellaneta to Otopeni | 537.33 mi (864.74 km) |
| Castellaneta to Ovidiu | 643.04 mi (1,034.88 km) |
