| Zaltbommel to Marco de Canavezes | 968.69 mi (1,558.96 km) |
| Zaltbommel to Marinha Grande | 1,073.29 mi (1,727.29 km) |
| Zaltbommel to Massama | 1,140.49 mi (1,835.44 km) |
| Zaltbommel to Matosinhos | 985.80 mi (1,586.49 km) |
| Zaltbommel to Mealhada | 1,022.77 mi (1,645.98 km) |
| Zaltbommel to Melgaco | 921.21 mi (1,482.55 km) |
| Zaltbommel to Melres | 982.89 mi (1,581.81 km) |
| Zaltbommel to Mira | 1,028.55 mi (1,655.29 km) |
| Zaltbommel to Miranda do Corvo | 1,035.39 mi (1,666.30 km) |
| Zaltbommel to Mirandela | 922.41 mi (1,484.47 km) |
| Zaltbommel to Mogadouro | 917.38 mi (1,476.38 km) |
| Zaltbommel to Moimenta da Beira | 963.89 mi (1,551.24 km) |
| Zaltbommel to Moita | 1,138.19 mi (1,831.74 km) |
| Zaltbommel to Moncao | 930.42 mi (1,497.36 km) |
| Zaltbommel to Montalegre | 922.17 mi (1,484.09 km) |
