| Barrhead to Mangualde | 1,061.10 mi (1,707.67 km) |
| Barrhead to Marco de Canavezes | 1,024.18 mi (1,648.26 km) |
| Barrhead to Marinha Grande | 1,128.30 mi (1,815.83 km) |
| Barrhead to Massama | 1,198.96 mi (1,929.54 km) |
| Barrhead to Matosinhos | 1,028.59 mi (1,655.36 km) |
| Barrhead to Mealhada | 1,081.15 mi (1,739.94 km) |
| Barrhead to Melgaco | 961.34 mi (1,547.12 km) |
| Barrhead to Melres | 1,034.07 mi (1,664.18 km) |
| Barrhead to Mira | 1,080.01 mi (1,738.12 km) |
| Barrhead to Miranda do Corvo | 1,099.63 mi (1,769.69 km) |
| Barrhead to Mirandela | 997.09 mi (1,604.67 km) |
| Barrhead to Mogadouro | 1,005.12 mi (1,617.59 km) |
| Barrhead to Moimenta da Beira | 1,034.40 mi (1,664.70 km) |
| Barrhead to Moita | 1,203.81 mi (1,937.34 km) |
| Barrhead to Moncao | 966.07 mi (1,554.73 km) |
