| Senec to Mangualde | 1,340.86 mi (2,157.91 km) |
| Senec to Marco de Canavezes | 1,337.89 mi (2,153.12 km) |
| Senec to Marinha Grande | 1,424.68 mi (2,292.81 km) |
| Senec to Massama | 1,478.15 mi (2,378.86 km) |
| Senec to Matosinhos | 1,362.70 mi (2,193.06 km) |
| Senec to Mealhada | 1,379.69 mi (2,220.40 km) |
| Senec to Melgaco | 1,312.17 mi (2,111.74 km) |
| Senec to Melres | 1,353.19 mi (2,177.74 km) |
| Senec to Mira | 1,390.58 mi (2,237.92 km) |
| Senec to Miranda do Corvo | 1,384.87 mi (2,228.73 km) |
| Senec to Mirandela | 1,283.92 mi (2,066.27 km) |
| Senec to Mogadouro | 1,268.26 mi (2,041.06 km) |
| Senec to Moimenta da Beira | 1,320.86 mi (2,125.72 km) |
| Senec to Moita | 1,469.54 mi (2,364.99 km) |
| Senec to Moncao | 1,323.26 mi (2,129.57 km) |
