| Niles to Mangualde | 3,992.16 mi (6,424.75 km) |
| Niles to Marco de Canavezes | 3,954.60 mi (6,364.32 km) |
| Niles to Marinha Grande | 3,968.27 mi (6,386.31 km) |
| Niles to Massama | 3,987.16 mi (6,416.72 km) |
| Niles to Matosinhos | 3,929.72 mi (6,324.27 km) |
| Niles to Mealhada | 3,968.47 mi (6,386.64 km) |
| Niles to Melgaco | 3,917.72 mi (6,304.97 km) |
| Niles to Melres | 3,947.28 mi (6,352.53 km) |
| Niles to Mira | 3,953.83 mi (6,363.07 km) |
| Niles to Miranda do Corvo | 3,983.61 mi (6,410.99 km) |
| Niles to Mirandela | 3,987.84 mi (6,417.81 km) |
| Niles to Mogadouro | 4,013.96 mi (6,459.85 km) |
| Niles to Moimenta da Beira | 3,985.84 mi (6,414.58 km) |
| Niles to Moita | 4,004.45 mi (6,444.53 km) |
| Niles to Moncao | 3,909.62 mi (6,291.93 km) |
