| Birstall to Mangualde | 950.37 mi (1,529.47 km) |
| Birstall to Marco de Canavezes | 917.57 mi (1,476.68 km) |
| Birstall to Marinha Grande | 1,024.31 mi (1,648.46 km) |
| Birstall to Massama | 1,095.28 mi (1,762.68 km) |
| Birstall to Matosinhos | 926.20 mi (1,490.58 km) |
| Birstall to Mealhada | 975.02 mi (1,569.14 km) |
| Birstall to Melgaco | 857.95 mi (1,380.74 km) |
| Birstall to Melres | 929.10 mi (1,495.25 km) |
| Birstall to Mira | 976.08 mi (1,570.85 km) |
| Birstall to Miranda do Corvo | 992.06 mi (1,596.57 km) |
| Birstall to Mirandela | 883.72 mi (1,422.21 km) |
| Birstall to Mogadouro | 887.98 mi (1,429.06 km) |
| Birstall to Moimenta da Beira | 923.31 mi (1,485.92 km) |
| Birstall to Moita | 1,097.94 mi (1,766.96 km) |
| Birstall to Moncao | 864.29 mi (1,390.95 km) |
