| Opoczno to Manerbio | 623.20 mi (1,002.94 km) |
| Opoczno to Manfredonia | 704.26 mi (1,133.39 km) |
| Opoczno to Maniago | 497.94 mi (801.35 km) |
| Opoczno to Mantova | 611.84 mi (984.66 km) |
| Opoczno to Maranello | 642.12 mi (1,033.39 km) |
| Opoczno to Marano di Napoli | 779.98 mi (1,255.26 km) |
| Opoczno to Marano Vicentino | 563.10 mi (906.22 km) |
| Opoczno to Marcianise | 769.26 mi (1,238.00 km) |
| Opoczno to Marcon | 543.23 mi (874.24 km) |
| Opoczno to Mareno di Piave | 526.41 mi (847.18 km) |
| Opoczno to Margherita di Savoia | 718.92 mi (1,157.00 km) |
| Opoczno to Mariano Comense | 640.64 mi (1,031.01 km) |
| Opoczno to Marigliano | 773.17 mi (1,244.30 km) |
| Opoczno to Marino | 755.31 mi (1,215.55 km) |
| Opoczno to Marostica | 553.55 mi (890.85 km) |
