| San Marino to Rowlett (Texas) | 1,242.67 mi (1,999.88 km) |
| San Marino to Roy (Utah) | 588.95 mi (947.82 km) |
| San Marino to Royal Kunia (Hawaii) | 2,574.70 mi (4,143.57 km) |
| San Marino to Royal Oak (Michigan) | 1,966.05 mi (3,164.06 km) |
| San Marino to Royal Palm Beach (Florida) | 2,301.34 mi (3,703.64 km) |
| San Marino to Royse City (Texas) | 1,255.18 mi (2,020.02 km) |
| San Marino to Ruskin (Florida) | 2,150.34 mi (3,460.64 km) |
| San Marino to Russellville (Alabama) | 1,727.64 mi (2,780.36 km) |
| San Marino to Russellville (Arkansas) | 1,417.20 mi (2,280.77 km) |
| San Marino to Ruston (Louisiana) | 1,471.08 mi (2,367.48 km) |
| San Marino to Rutherford (New Jersey) | 2,431.09 mi (3,912.46 km) |
| San Marino to Rutland (Vermont) | 2,482.34 mi (3,994.93 km) |
| San Marino to Sabana Grande (Puerto Rico) | 3,323.68 mi (5,348.95 km) |
| San Marino to Sachse (Texas) | 1,240.26 mi (1,996.01 km) |
| San Marino to Saco (Maine) | 2,608.34 mi (4,197.72 km) |
