| San Martino Buon Albergo to Marco de Canavezes | 1,008.36 mi (1,622.81 km) |
| San Martino Buon Albergo to Marinha Grande | 1,088.17 mi (1,751.24 km) |
| San Martino Buon Albergo to Massama | 1,137.45 mi (1,830.55 km) |
| San Martino Buon Albergo to Matosinhos | 1,034.66 mi (1,665.12 km) |
| San Martino Buon Albergo to Mealhada | 1,045.65 mi (1,682.80 km) |
| San Martino Buon Albergo to Melgaco | 990.23 mi (1,593.61 km) |
| San Martino Buon Albergo to Melres | 1,023.51 mi (1,647.18 km) |
| San Martino Buon Albergo to Mira | 1,057.57 mi (1,702.00 km) |
| San Martino Buon Albergo to Miranda do Corvo | 1,048.83 mi (1,687.93 km) |
| San Martino Buon Albergo to Mirandela | 953.97 mi (1,535.27 km) |
| San Martino Buon Albergo to Mogadouro | 935.92 mi (1,506.23 km) |
| San Martino Buon Albergo to Moimenta da Beira | 988.48 mi (1,590.81 km) |
| San Martino Buon Albergo to Moita | 1,127.70 mi (1,814.86 km) |
| San Martino Buon Albergo to Moncao | 1,001.53 mi (1,611.80 km) |
| San Martino Buon Albergo to Montalegre | 974.48 mi (1,568.27 km) |
