| San Marino to Mangualde | 5,636.34 mi (9,070.82 km) |
| San Marino to Marco de Canavezes | 5,595.65 mi (9,005.33 km) |
| San Marino to Marinha Grande | 5,623.95 mi (9,050.88 km) |
| San Marino to Massama | 5,651.47 mi (9,095.15 km) |
| San Marino to Matosinhos | 5,573.07 mi (8,968.98 km) |
| San Marino to Mealhada | 5,617.29 mi (9,040.16 km) |
| San Marino to Melgaco | 5,551.26 mi (8,933.89 km) |
| San Marino to Melres | 5,590.34 mi (8,996.79 km) |
| San Marino to Mira | 5,603.40 mi (9,017.81 km) |
| San Marino to Miranda do Corvo | 5,634.19 mi (9,067.35 km) |
| San Marino to Mirandela | 5,622.15 mi (9,047.98 km) |
| San Marino to Mogadouro | 5,647.53 mi (9,088.81 km) |
| San Marino to Moimenta da Beira | 5,626.30 mi (9,054.66 km) |
| San Marino to Moita | 5,668.41 mi (9,122.43 km) |
| San Marino to Moncao | 5,544.45 mi (8,922.93 km) |
