| Opoczno to Noventa Vicentina | 581.43 mi (935.72 km) |
| Opoczno to Novi di Modena | 621.95 mi (1,000.93 km) |
| Opoczno to Novi Ligure | 699.34 mi (1,125.48 km) |
| Opoczno to Nuoro | 926.22 mi (1,490.60 km) |
| Opoczno to Occhiobello | 599.19 mi (964.30 km) |
| Opoczno to Oderzo | 525.21 mi (845.25 km) |
| Opoczno to Oggiono | 630.81 mi (1,015.19 km) |
| Opoczno to Olbia | 886.24 mi (1,426.27 km) |
| Opoczno to Oleggio | 665.13 mi (1,070.43 km) |
| Opoczno to Olgiate Comasco | 644.68 mi (1,037.51 km) |
| Opoczno to Olgiate Olona | 654.53 mi (1,053.37 km) |
| Opoczno to Omegna | 661.06 mi (1,063.88 km) |
| Opoczno to Opera | 654.23 mi (1,052.88 km) |
| Opoczno to Oppeano | 591.72 mi (952.29 km) |
| Opoczno to Orbassano | 732.19 mi (1,178.35 km) |
