| South San Francisco to Mendota (California) | 128.37 mi (206.59 km) |
| South San Francisco to Mendota Heights (Minnesota) | 1,590.36 mi (2,559.44 km) |
| South San Francisco to Menifee (California) | 401.49 mi (646.13 km) |
| South San Francisco to Menlo Park (California) | 18.84 mi (30.32 km) |
| South San Francisco to Menomonee Falls (Wisconsin) | 1,830.63 mi (2,946.11 km) |
| South San Francisco to Menomonie (Wisconsin) | 1,650.22 mi (2,655.77 km) |
| South San Francisco to Mentor (Ohio) | 2,181.78 mi (3,511.24 km) |
| South San Francisco to Mequon (Wisconsin) | 1,837.65 mi (2,957.41 km) |
| South San Francisco to Merced (California) | 109.14 mi (175.65 km) |
| South San Francisco to Mercedes (Texas) | 1,635.16 mi (2,631.54 km) |
| South San Francisco to Mercer Island (Washington) | 684.94 mi (1,102.30 km) |
| South San Francisco to Mercerville (New Jersey) | 2,539.94 mi (4,087.63 km) |
| South San Francisco to Meriden (Connecticut) | 2,619.34 mi (4,215.42 km) |
| South San Francisco to Meridian (Idaho) | 518.48 mi (834.42 km) |
| South San Francisco to Meridian (Mississippi) | 1,932.25 mi (3,109.66 km) |
