| San Luis to McHenry (Illinois) | 1,592.55 mi (2,562.96 km) |
| San Luis to McKeesport (Pennsylvania) | 1,998.72 mi (3,216.63 km) |
| San Luis to McKinleyville (California) | 780.80 mi (1,256.58 km) |
| San Luis to McKinney (Texas) | 1,047.14 mi (1,685.20 km) |
| San Luis to McLean (Virginia) | 2,135.50 mi (3,436.75 km) |
| San Luis to McMinnville (Oregon) | 988.97 mi (1,591.60 km) |
| San Luis to McMinnville (Tennessee) | 1,663.86 mi (2,677.72 km) |
| San Luis to McNair (Virginia) | 2,123.83 mi (3,417.97 km) |
| San Luis to McPherson (Kansas) | 1,040.16 mi (1,673.98 km) |
| San Luis to Mead Valley (California) | 175.50 mi (282.45 km) |
| San Luis to Meadow Woods (Florida) | 1,999.68 mi (3,218.18 km) |
| San Luis to Meadowbrook (Virginia) | 2,121.91 mi (3,414.89 km) |
| San Luis to Meadville (Pennsylvania) | 1,992.24 mi (3,206.21 km) |
| San Luis to Mebane (North Carolina) | 2,026.84 mi (3,261.88 km) |
| San Luis to Mechanicsville (Virginia) | 2,127.91 mi (3,424.54 km) |
