| Castel Bolognese to Nowy Sacz | 556.49 mi (895.58 km) |
| Castel Bolognese to Nowy Targ | 525.88 mi (846.32 km) |
| Castel Bolognese to Nowy Tomysl | 587.24 mi (945.07 km) |
| Castel Bolognese to Nysa | 497.51 mi (800.66 km) |
| Castel Bolognese to Oborniki | 619.54 mi (997.06 km) |
| Castel Bolognese to Oborniki Slaskie | 537.04 mi (864.29 km) |
| Castel Bolognese to Olawa | 523.67 mi (842.77 km) |
| Castel Bolognese to Olecko | 825.29 mi (1,328.18 km) |
| Castel Bolognese to Olesnica | 541.33 mi (871.18 km) |
| Castel Bolognese to Olesno | 547.58 mi (881.24 km) |
| Castel Bolognese to Olkusz | 549.16 mi (883.78 km) |
| Castel Bolognese to Olsztyn | 761.50 mi (1,225.52 km) |
| Castel Bolognese to Opalenica | 591.13 mi (951.33 km) |
| Castel Bolognese to Opoczno | 625.92 mi (1,007.33 km) |
| Castel Bolognese to Opole | 523.51 mi (842.50 km) |
