| Barreiro to Manerbio | 1,085.26 mi (1,746.56 km) |
| Barreiro to Manfredonia | 1,330.46 mi (2,141.16 km) |
| Barreiro to Maniago | 1,220.73 mi (1,964.58 km) |
| Barreiro to Mantova | 1,111.35 mi (1,788.54 km) |
| Barreiro to Maranello | 1,103.25 mi (1,775.52 km) |
| Barreiro to Marano di Napoli | 1,240.38 mi (1,996.20 km) |
| Barreiro to Marano Vicentino | 1,152.22 mi (1,854.32 km) |
| Barreiro to Marcianise | 1,246.42 mi (2,005.92 km) |
| Barreiro to Marcon | 1,189.36 mi (1,914.09 km) |
| Barreiro to Mareno di Piave | 1,197.39 mi (1,927.02 km) |
| Barreiro to Margherita di Savoia | 1,342.50 mi (2,160.54 km) |
| Barreiro to Mariano Comense | 1,049.79 mi (1,689.47 km) |
| Barreiro to Marigliano | 1,254.28 mi (2,018.57 km) |
| Barreiro to Marino | 1,163.22 mi (1,872.02 km) |
| Barreiro to Marostica | 1,163.38 mi (1,872.28 km) |
