| San Mateo to Maryland Heights (Missouri) | 1,723.37 mi (2,773.49 km) |
| San Mateo to Marysville (California) | 117.36 mi (188.87 km) |
| San Mateo to Marysville (Ohio) | 2,086.15 mi (3,357.34 km) |
| San Mateo to Marysville (Washington) | 727.51 mi (1,170.81 km) |
| San Mateo to Maryville (Missouri) | 1,481.13 mi (2,383.65 km) |
| San Mateo to Maryville (Tennessee) | 2,113.89 mi (3,401.98 km) |
| San Mateo to Mason (Ohio) | 2,045.20 mi (3,291.43 km) |
| San Mateo to Mason City (Iowa) | 1,572.28 mi (2,530.34 km) |
| San Mateo to Massapequa (New York) | 2,593.62 mi (4,174.02 km) |
| San Mateo to Massapequa Park (New York) | 2,594.50 mi (4,175.44 km) |
| San Mateo to Massillon (Ohio) | 2,176.54 mi (3,502.80 km) |
| San Mateo to Mastic (New York) | 2,623.57 mi (4,222.23 km) |
| San Mateo to Mastic Beach (New York) | 2,624.74 mi (4,224.11 km) |
| San Mateo to Matteson (Illinois) | 1,849.65 mi (2,976.73 km) |
| San Mateo to Matthews (North Carolina) | 2,302.75 mi (3,705.92 km) |
