| Opoczno to Montevarchi | 677.18 mi (1,089.82 km) |
| Opoczno to Monticello Conte Otto | 563.35 mi (906.63 km) |
| Opoczno to Montichiari | 611.99 mi (984.90 km) |
| Opoczno to Montignoso | 691.66 mi (1,113.12 km) |
| Opoczno to Montopoli in Val d'Arno | 692.97 mi (1,115.23 km) |
| Opoczno to Monza | 642.79 mi (1,034.48 km) |
| Opoczno to Morbegno | 607.06 mi (976.97 km) |
| Opoczno to Mori | 570.57 mi (918.25 km) |
| Opoczno to Morlupo | 735.74 mi (1,184.05 km) |
| Opoczno to Morrovalle | 638.64 mi (1,027.79 km) |
| Opoczno to Mortara | 677.09 mi (1,089.67 km) |
| Opoczno to Mosciano Sant'Angelo | 667.33 mi (1,073.96 km) |
| Opoczno to Motta di Livenza | 521.72 mi (839.62 km) |
| Opoczno to Motta Sant'Anastasia | 993.42 mi (1,598.76 km) |
| Opoczno to Mottola | 758.37 mi (1,220.49 km) |
