| South San Francisco to Mangualde | 5,635.13 mi (9,068.86 km) |
| South San Francisco to Marco de Canavezes | 5,592.93 mi (9,000.95 km) |
| South San Francisco to Marinha Grande | 5,630.18 mi (9,060.91 km) |
| South San Francisco to Massama | 5,663.31 mi (9,114.22 km) |
| South San Francisco to Matosinhos | 5,571.98 mi (8,967.23 km) |
| South San Francisco to Mealhada | 5,619.15 mi (9,043.15 km) |
| South San Francisco to Melgaco | 5,544.58 mi (8,923.14 km) |
| South San Francisco to Melres | 5,588.90 mi (8,994.47 km) |
| South San Francisco to Mira | 5,605.88 mi (9,021.79 km) |
| South San Francisco to Miranda do Corvo | 5,637.01 mi (9,071.88 km) |
| South San Francisco to Mirandela | 5,615.18 mi (9,036.75 km) |
| South San Francisco to Mogadouro | 5,639.85 mi (9,076.46 km) |
| South San Francisco to Moimenta da Beira | 5,622.93 mi (9,049.22 km) |
| South San Francisco to Moita | 5,679.86 mi (9,140.86 km) |
| South San Francisco to Moncao | 5,538.59 mi (8,913.50 km) |
