| Glen Parva to Mangualde | 884.30 mi (1,423.14 km) |
| Glen Parva to Marco de Canavezes | 853.24 mi (1,373.16 km) |
| Glen Parva to Marinha Grande | 960.39 mi (1,545.60 km) |
| Glen Parva to Massama | 1,031.16 mi (1,659.49 km) |
| Glen Parva to Matosinhos | 863.45 mi (1,389.60 km) |
| Glen Parva to Mealhada | 910.55 mi (1,465.39 km) |
| Glen Parva to Melgaco | 795.27 mi (1,279.87 km) |
| Glen Parva to Melres | 865.34 mi (1,392.63 km) |
| Glen Parva to Mira | 912.44 mi (1,468.43 km) |
| Glen Parva to Miranda do Corvo | 926.97 mi (1,491.81 km) |
| Glen Parva to Mirandela | 817.03 mi (1,314.88 km) |
| Glen Parva to Mogadouro | 819.86 mi (1,319.44 km) |
| Glen Parva to Moimenta da Beira | 857.25 mi (1,379.61 km) |
| Glen Parva to Moita | 1,033.00 mi (1,662.45 km) |
| Glen Parva to Moncao | 802.21 mi (1,291.03 km) |
