| Corning to Mangualde | 3,490.90 mi (5,618.06 km) |
| Corning to Marco de Canavezes | 3,455.22 mi (5,560.64 km) |
| Corning to Marinha Grande | 3,461.35 mi (5,570.50 km) |
| Corning to Massama | 3,475.69 mi (5,593.58 km) |
| Corning to Matosinhos | 3,429.38 mi (5,519.05 km) |
| Corning to Mealhada | 3,465.05 mi (5,576.46 km) |
| Corning to Melgaco | 3,422.43 mi (5,507.87 km) |
| Corning to Melres | 3,446.93 mi (5,547.31 km) |
| Corning to Mira | 3,450.13 mi (5,552.45 km) |
| Corning to Miranda do Corvo | 3,479.18 mi (5,599.21 km) |
| Corning to Mirandela | 3,491.56 mi (5,619.12 km) |
| Corning to Mogadouro | 3,517.82 mi (5,661.39 km) |
| Corning to Moimenta da Beira | 3,486.49 mi (5,610.97 km) |
| Corning to Moita | 3,493.05 mi (5,621.51 km) |
| Corning to Moncao | 3,413.74 mi (5,493.89 km) |
