| San Luis to Mattoon (Illinois) | 1,543.52 mi (2,484.05 km) |
| San Luis to Mauldin (South Carolina) | 1,862.79 mi (2,997.88 km) |
| San Luis to Maumee (Ohio) | 1,811.83 mi (2,915.85 km) |
| San Luis to Maumelle (Arkansas) | 1,290.42 mi (2,076.73 km) |
| San Luis to Mayagüez (Puerto Rico) | 3,101.95 mi (4,992.11 km) |
| San Luis to Mayfield Heights (Ohio) | 1,924.12 mi (3,096.57 km) |
| San Luis to Mays Chapel (Maryland) | 2,164.88 mi (3,484.03 km) |
| San Luis to Maywood (California) | 226.08 mi (363.84 km) |
| San Luis to Maywood (Illinois) | 1,606.06 mi (2,584.70 km) |
| San Luis to McAlester (Oklahoma) | 1,099.57 mi (1,769.58 km) |
| San Luis to McAllen (Texas) | 1,080.12 mi (1,738.28 km) |
| San Luis to McCalla (Alabama) | 1,602.03 mi (2,578.22 km) |
| San Luis to McComb (Mississippi) | 1,421.78 mi (2,288.13 km) |
| San Luis to McDonough (Georgia) | 1,766.28 mi (2,842.55 km) |
| San Luis to McFarland (California) | 340.15 mi (547.42 km) |
