| San Marino to Rockport (Texas) | 1,311.45 mi (2,110.58 km) |
| San Marino to Rockville (Maryland) | 2,278.11 mi (3,666.27 km) |
| San Marino to Rockville Centre (New York) | 2,456.21 mi (3,952.89 km) |
| San Marino to Rockwall (Texas) | 1,249.02 mi (2,010.11 km) |
| San Marino to Rocky Mount (North Carolina) | 2,267.49 mi (3,649.18 km) |
| San Marino to Rocky Point (New York) | 2,491.52 mi (4,009.71 km) |
| San Marino to Rocky River (Ohio) | 2,027.77 mi (3,263.38 km) |
| San Marino to Roessleville (New York) | 2,441.86 mi (3,929.79 km) |
| San Marino to Rogers (Arkansas) | 1,357.42 mi (2,184.55 km) |
| San Marino to Rogers (Minnesota) | 1,503.62 mi (2,419.83 km) |
| San Marino to Rohnert Park (California) | 387.80 mi (624.11 km) |
| San Marino to Rolla (Missouri) | 1,490.74 mi (2,399.11 km) |
| San Marino to Rolling Meadows (Illinois) | 1,715.32 mi (2,760.54 km) |
| San Marino to Roma (Texas) | 1,255.56 mi (2,020.63 km) |
| San Marino to Rome (Georgia) | 1,873.43 mi (3,014.99 km) |
