| South San Francisco to Mankato (Minnesota) | 1,543.03 mi (2,483.27 km) |
| South San Francisco to Manor (Texas) | 1,507.04 mi (2,425.34 km) |
| South San Francisco to Manorville (New York) | 2,628.79 mi (4,230.63 km) |
| South San Francisco to Mansfield (Ohio) | 2,128.05 mi (3,424.77 km) |
| South San Francisco to Mansfield (Texas) | 1,467.49 mi (2,361.70 km) |
| South San Francisco to Manteca (California) | 65.91 mi (106.07 km) |
| South San Francisco to Manville (New Jersey) | 2,540.96 mi (4,089.28 km) |
| South San Francisco to Maple Grove (Minnesota) | 1,577.07 mi (2,538.05 km) |
| South San Francisco to Maple Heights (Ohio) | 2,172.41 mi (3,496.15 km) |
| South San Francisco to Maple Valley (Washington) | 671.32 mi (1,080.39 km) |
| South San Francisco to Mapleton (Utah) | 607.18 mi (977.17 km) |
| South San Francisco to Maplewood (Minnesota) | 1,596.94 mi (2,570.03 km) |
| South San Francisco to Marana (Arizona) | 731.33 mi (1,176.96 km) |
| South San Francisco to Marco Island (Florida) | 2,502.40 mi (4,027.23 km) |
| South San Francisco to Margate (Florida) | 2,572.89 mi (4,140.66 km) |
