| Longbridge to Mangualde | 859.14 mi (1,382.64 km) |
| Longbridge to Marco de Canavezes | 827.08 mi (1,331.06 km) |
| Longbridge to Marinha Grande | 934.05 mi (1,503.21 km) |
| Longbridge to Massama | 1,004.95 mi (1,617.31 km) |
| Longbridge to Matosinhos | 836.48 mi (1,346.18 km) |
| Longbridge to Mealhada | 884.49 mi (1,423.46 km) |
| Longbridge to Melgaco | 768.23 mi (1,236.34 km) |
| Longbridge to Melres | 838.89 mi (1,350.06 km) |
| Longbridge to Mira | 885.94 mi (1,425.78 km) |
| Longbridge to Miranda do Corvo | 901.26 mi (1,450.44 km) |
| Longbridge to Mirandela | 792.21 mi (1,274.94 km) |
| Longbridge to Mogadouro | 795.94 mi (1,280.95 km) |
| Longbridge to Moimenta da Beira | 832.07 mi (1,339.08 km) |
| Longbridge to Moita | 1,007.24 mi (1,620.99 km) |
| Longbridge to Moncao | 774.87 mi (1,247.04 km) |
