| Horizon West to Mangualde | 4,165.59 mi (6,703.88 km) |
| Horizon West to Marco de Canavezes | 4,136.68 mi (6,657.34 km) |
| Horizon West to Marinha Grande | 4,119.07 mi (6,629.01 km) |
| Horizon West to Massama | 4,117.35 mi (6,626.23 km) |
| Horizon West to Matosinhos | 4,108.79 mi (6,612.45 km) |
| Horizon West to Mealhada | 4,133.90 mi (6,652.87 km) |
| Horizon West to Melgaco | 4,116.69 mi (6,625.17 km) |
| Horizon West to Melres | 4,125.79 mi (6,639.82 km) |
| Horizon West to Mira | 4,118.60 mi (6,628.25 km) |
| Horizon West to Miranda do Corvo | 4,144.40 mi (6,669.77 km) |
| Horizon West to Mirandela | 4,180.86 mi (6,728.45 km) |
| Horizon West to Mogadouro | 4,206.74 mi (6,770.10 km) |
| Horizon West to Moimenta da Beira | 4,167.08 mi (6,706.27 km) |
| Horizon West to Moita | 4,134.37 mi (6,653.63 km) |
| Horizon West to Moncao | 4,106.64 mi (6,609.00 km) |
