| South San Francisco to Maryland Heights (Missouri) | 1,727.60 mi (2,780.30 km) |
| South San Francisco to Marysville (California) | 112.97 mi (181.80 km) |
| South San Francisco to Marysville (Ohio) | 2,089.68 mi (3,363.02 km) |
| South San Francisco to Marysville (Washington) | 720.57 mi (1,159.64 km) |
| South San Francisco to Maryville (Missouri) | 1,484.86 mi (2,389.66 km) |
| South San Francisco to Maryville (Tennessee) | 2,118.68 mi (3,409.69 km) |
| South San Francisco to Mason (Ohio) | 2,049.01 mi (3,297.57 km) |
| South San Francisco to Mason City (Iowa) | 1,574.91 mi (2,534.57 km) |
| South San Francisco to Massapequa (New York) | 2,596.69 mi (4,178.97 km) |
| South San Francisco to Massapequa Park (New York) | 2,597.57 mi (4,180.39 km) |
| South San Francisco to Massillon (Ohio) | 2,179.85 mi (3,508.14 km) |
| South San Francisco to Mastic (New York) | 2,626.59 mi (4,227.08 km) |
| South San Francisco to Mastic Beach (New York) | 2,627.77 mi (4,228.98 km) |
| South San Francisco to Matteson (Illinois) | 1,852.89 mi (2,981.93 km) |
| South San Francisco to Matthews (North Carolina) | 2,307.51 mi (3,713.58 km) |
