| Ostrow Wielkopolski to Noventa Vicentina | 525.23 mi (845.28 km) |
| Ostrow Wielkopolski to Novi di Modena | 564.28 mi (908.12 km) |
| Ostrow Wielkopolski to Novi Ligure | 631.18 mi (1,015.79 km) |
| Ostrow Wielkopolski to Nuoro | 881.22 mi (1,418.19 km) |
| Ostrow Wielkopolski to Occhiobello | 545.68 mi (878.18 km) |
| Ostrow Wielkopolski to Oderzo | 472.27 mi (760.04 km) |
| Ostrow Wielkopolski to Oggiono | 558.97 mi (899.58 km) |
| Ostrow Wielkopolski to Olbia | 839.93 mi (1,351.73 km) |
| Ostrow Wielkopolski to Oleggio | 591.26 mi (951.53 km) |
| Ostrow Wielkopolski to Olgiate Comasco | 571.10 mi (919.09 km) |
| Ostrow Wielkopolski to Olgiate Olona | 581.53 mi (935.89 km) |
| Ostrow Wielkopolski to Omegna | 584.52 mi (940.69 km) |
| Ostrow Wielkopolski to Opera | 584.33 mi (940.39 km) |
| Ostrow Wielkopolski to Oppeano | 533.16 mi (858.04 km) |
| Ostrow Wielkopolski to Orbassano | 657.32 mi (1,057.85 km) |
