| Lockport to Mangualde | 4,016.33 mi (6,463.66 km) |
| Lockport to Marco de Canavezes | 3,978.94 mi (6,403.48 km) |
| Lockport to Marinha Grande | 3,991.91 mi (6,424.36 km) |
| Lockport to Massama | 4,010.36 mi (6,454.04 km) |
| Lockport to Matosinhos | 3,953.97 mi (6,363.29 km) |
| Lockport to Mealhada | 3,992.45 mi (6,425.22 km) |
| Lockport to Melgaco | 3,942.40 mi (6,344.67 km) |
| Lockport to Melres | 3,971.53 mi (6,391.55 km) |
| Lockport to Mira | 3,977.78 mi (6,401.61 km) |
| Lockport to Miranda do Corvo | 4,007.49 mi (6,449.44 km) |
| Lockport to Mirandela | 4,012.45 mi (6,457.41 km) |
| Lockport to Mogadouro | 4,038.58 mi (6,499.47 km) |
| Lockport to Moimenta da Beira | 4,010.18 mi (6,453.76 km) |
| Lockport to Moita | 4,027.65 mi (6,481.88 km) |
| Lockport to Moncao | 3,934.24 mi (6,331.55 km) |
