| San Marino to Morris (Illinois) | 1,687.79 mi (2,716.23 km) |
| San Marino to Morristown (New Jersey) | 2,411.79 mi (3,881.40 km) |
| San Marino to Morristown (Tennessee) | 1,961.15 mi (3,156.17 km) |
| San Marino to Morrisville (North Carolina) | 2,211.85 mi (3,559.63 km) |
| San Marino to Morro Bay (California) | 177.53 mi (285.70 km) |
| San Marino to Morton (Illinois) | 1,627.59 mi (2,619.35 km) |
| San Marino to Morton Grove (Illinois) | 1,726.97 mi (2,779.29 km) |
| San Marino to Moscow (Idaho) | 873.10 mi (1,405.12 km) |
| San Marino to Moses Lake (Washington) | 900.63 mi (1,449.42 km) |
| San Marino to Moss Bluff (Louisiana) | 1,475.95 mi (2,375.31 km) |
| San Marino to Moss Point (Mississippi) | 1,740.91 mi (2,801.72 km) |
| San Marino to Moultrie (Georgia) | 1,999.18 mi (3,217.37 km) |
| San Marino to Mounds View (Minnesota) | 1,518.38 mi (2,443.60 km) |
| San Marino to Mount Airy (North Carolina) | 2,107.20 mi (3,391.21 km) |
| San Marino to Mount Clemens (Michigan) | 1,980.41 mi (3,187.16 km) |
