| Srem to Marco de Canavezes | 1,400.74 mi (2,254.27 km) |
| Srem to Marinha Grande | 1,497.76 mi (2,410.41 km) |
| Srem to Massama | 1,558.61 mi (2,508.34 km) |
| Srem to Matosinhos | 1,422.37 mi (2,289.08 km) |
| Srem to Mealhada | 1,449.26 mi (2,332.35 km) |
| Srem to Melgaco | 1,363.86 mi (2,194.92 km) |
| Srem to Melres | 1,415.84 mi (2,278.58 km) |
| Srem to Mira | 1,457.96 mi (2,346.36 km) |
| Srem to Miranda do Corvo | 1,458.02 mi (2,346.46 km) |
| Srem to Mirandela | 1,349.16 mi (2,171.27 km) |
| Srem to Mogadouro | 1,338.05 mi (2,153.38 km) |
| Srem to Moimenta da Beira | 1,389.11 mi (2,235.56 km) |
| Srem to Moita | 1,552.71 mi (2,498.85 km) |
| Srem to Moncao | 1,374.24 mi (2,211.63 km) |
| Srem to Montalegre | 1,357.93 mi (2,185.37 km) |
