| Nova Gradiska to Oria | 328.44 mi (528.57 km) |
| Nova Gradiska to Oristano | 579.42 mi (932.49 km) |
| Nova Gradiska to Orta Nova | 283.53 mi (456.29 km) |
| Nova Gradiska to Orte | 314.76 mi (506.56 km) |
| Nova Gradiska to Ortona | 249.52 mi (401.57 km) |
| Nova Gradiska to Orvieto | 315.04 mi (507.02 km) |
| Nova Gradiska to Orzinuovi | 361.93 mi (582.47 km) |
| Nova Gradiska to Osimo | 228.01 mi (366.95 km) |
| Nova Gradiska to Ospitaletto | 355.12 mi (571.52 km) |
| Nova Gradiska to Ostuni | 312.24 mi (502.50 km) |
| Nova Gradiska to Ottaviano | 337.50 mi (543.16 km) |
| Nova Gradiska to Ovada | 429.13 mi (690.62 km) |
| Nova Gradiska to Ozieri | 532.15 mi (856.41 km) |
| Nova Gradiska to Paceco | 560.46 mi (901.98 km) |
| Nova Gradiska to Pachino | 601.43 mi (967.91 km) |
