| Castelli Calepio to Marco de Canavezes | 954.28 mi (1,535.77 km) |
| Castelli Calepio to Marinha Grande | 1,036.03 mi (1,667.33 km) |
| Castelli Calepio to Massama | 1,086.77 mi (1,748.98 km) |
| Castelli Calepio to Matosinhos | 980.27 mi (1,577.60 km) |
| Castelli Calepio to Mealhada | 992.75 mi (1,597.67 km) |
| Castelli Calepio to Melgaco | 934.58 mi (1,504.07 km) |
| Castelli Calepio to Melres | 969.48 mi (1,560.22 km) |
| Castelli Calepio to Mira | 1,004.41 mi (1,616.44 km) |
| Castelli Calepio to Miranda do Corvo | 996.51 mi (1,603.73 km) |
| Castelli Calepio to Mirandela | 899.92 mi (1,448.28 km) |
| Castelli Calepio to Mogadouro | 882.44 mi (1,420.15 km) |
| Castelli Calepio to Moimenta da Beira | 935.07 mi (1,504.86 km) |
| Castelli Calepio to Moita | 1,077.44 mi (1,733.98 km) |
| Castelli Calepio to Moncao | 945.86 mi (1,522.22 km) |
| Castelli Calepio to Montalegre | 919.52 mi (1,479.82 km) |
