| Oss to Marco de Canavezes | 975.36 mi (1,569.70 km) |
| Oss to Marinha Grande | 1,079.73 mi (1,737.66 km) |
| Oss to Massama | 1,146.73 mi (1,845.48 km) |
| Oss to Matosinhos | 992.70 mi (1,597.59 km) |
| Oss to Mealhada | 1,029.25 mi (1,656.41 km) |
| Oss to Melgaco | 928.33 mi (1,494.00 km) |
| Oss to Melres | 989.62 mi (1,592.64 km) |
| Oss to Mira | 1,035.17 mi (1,665.94 km) |
| Oss to Miranda do Corvo | 1,041.72 mi (1,676.48 km) |
| Oss to Mirandela | 928.79 mi (1,494.74 km) |
| Oss to Mogadouro | 923.49 mi (1,486.21 km) |
| Oss to Moimenta da Beira | 970.26 mi (1,561.48 km) |
| Oss to Moita | 1,144.28 mi (1,841.54 km) |
| Oss to Moncao | 937.60 mi (1,508.92 km) |
| Oss to Montalegre | 928.97 mi (1,495.03 km) |
