| South San Francisco to Montgomeryville (Pennsylvania) | 2,511.39 mi (4,041.70 km) |
| South San Francisco to Monticello (Minnesota) | 1,562.99 mi (2,515.39 km) |
| South San Francisco to Montrose (Colorado) | 793.28 mi (1,276.65 km) |
| South San Francisco to Moody (Alabama) | 2,024.42 mi (3,257.98 km) |
| South San Francisco to Moore (Oklahoma) | 1,390.70 mi (2,238.12 km) |
| South San Francisco to Moorestown-Lenola (New Jersey) | 2,529.69 mi (4,071.15 km) |
| South San Francisco to Mooresville (North Carolina) | 2,292.08 mi (3,688.75 km) |
| South San Francisco to Moorhead (Minnesota) | 1,450.07 mi (2,333.66 km) |
| South San Francisco to Moorpark (California) | 305.54 mi (491.72 km) |
| South San Francisco to Moraga (California) | 20.88 mi (33.60 km) |
| South San Francisco to Moreno Valley (California) | 389.53 mi (626.89 km) |
| South San Francisco to Morgan City (Louisiana) | 1,867.71 mi (3,005.79 km) |
| South San Francisco to Morgan Hill (California) | 55.86 mi (89.89 km) |
| South San Francisco to Morganton (North Carolina) | 2,241.96 mi (3,608.09 km) |
| South San Francisco to Morgantown (West Virginia) | 2,274.67 mi (3,660.73 km) |
