| San Marino to Montgomeryville (Pennsylvania) | 2,374.08 mi (3,820.71 km) |
| San Marino to Monticello (Minnesota) | 1,496.60 mi (2,408.55 km) |
| San Marino to Montrose (Colorado) | 644.63 mi (1,037.43 km) |
| San Marino to Moody (Alabama) | 1,807.07 mi (2,908.20 km) |
| San Marino to Moore (Oklahoma) | 1,172.78 mi (1,887.41 km) |
| San Marino to Moorestown-Lenola (New Jersey) | 2,390.00 mi (3,846.33 km) |
| San Marino to Mooresville (North Carolina) | 2,103.88 mi (3,385.87 km) |
| San Marino to Moorhead (Minnesota) | 1,418.82 mi (2,283.37 km) |
| San Marino to Moorpark (California) | 45.08 mi (72.54 km) |
| San Marino to Moraga (California) | 341.04 mi (548.86 km) |
| San Marino to Moreno Valley (California) | 53.80 mi (86.59 km) |
| San Marino to Morgan City (Louisiana) | 1,603.28 mi (2,580.23 km) |
| San Marino to Morgan Hill (California) | 287.23 mi (462.25 km) |
| San Marino to Morganton (North Carolina) | 2,053.82 mi (3,305.30 km) |
| San Marino to Morgantown (West Virginia) | 2,127.15 mi (3,423.31 km) |
