| Rockford to Mangualde | 4,041.29 mi (6,503.82 km) |
| Rockford to Marco de Canavezes | 4,003.41 mi (6,442.87 km) |
| Rockford to Marinha Grande | 4,018.47 mi (6,467.10 km) |
| Rockford to Massama | 4,038.24 mi (6,498.91 km) |
| Rockford to Matosinhos | 3,978.72 mi (6,403.13 km) |
| Rockford to Mealhada | 4,018.02 mi (6,466.37 km) |
| Rockford to Melgaco | 3,965.81 mi (6,382.36 km) |
| Rockford to Melres | 3,996.27 mi (6,431.37 km) |
| Rockford to Mira | 4,003.43 mi (6,442.90 km) |
| Rockford to Miranda do Corvo | 4,033.33 mi (6,491.02 km) |
| Rockford to Mirandela | 4,036.07 mi (6,495.43 km) |
| Rockford to Mogadouro | 4,062.14 mi (6,537.39 km) |
| Rockford to Moimenta da Beira | 4,034.62 mi (6,493.09 km) |
| Rockford to Moita | 4,055.50 mi (6,526.69 km) |
| Rockford to Moncao | 3,957.82 mi (6,369.49 km) |
