| Horbury to Mangualde | 947.11 mi (1,524.23 km) |
| Horbury to Marco de Canavezes | 914.50 mi (1,471.75 km) |
| Horbury to Marinha Grande | 1,021.30 mi (1,643.63 km) |
| Horbury to Massama | 1,092.26 mi (1,757.83 km) |
| Horbury to Matosinhos | 923.31 mi (1,485.93 km) |
| Horbury to Mealhada | 971.95 mi (1,564.20 km) |
| Horbury to Melgaco | 855.06 mi (1,376.08 km) |
| Horbury to Melres | 926.10 mi (1,490.42 km) |
| Horbury to Mira | 973.10 mi (1,566.05 km) |
| Horbury to Miranda do Corvo | 988.92 mi (1,591.52 km) |
| Horbury to Mirandela | 880.38 mi (1,416.84 km) |
| Horbury to Mogadouro | 884.48 mi (1,423.43 km) |
| Horbury to Moimenta da Beira | 920.05 mi (1,480.67 km) |
| Horbury to Moita | 1,094.83 mi (1,761.96 km) |
| Horbury to Moncao | 861.46 mi (1,386.39 km) |
