| San Marino to Shoreview (Minnesota) | 1,521.07 mi (2,447.93 km) |
| San Marino to Shorewood (Illinois) | 1,700.17 mi (2,736.16 km) |
| San Marino to Shorewood (Wisconsin) | 1,734.15 mi (2,790.84 km) |
| San Marino to Short Hills (New Jersey) | 2,419.83 mi (3,894.35 km) |
| San Marino to Short Pump (Virginia) | 2,262.21 mi (3,640.68 km) |
| San Marino to Show Low (Arizona) | 461.46 mi (742.64 km) |
| San Marino to Shreveport (Louisiana) | 1,405.76 mi (2,262.35 km) |
| San Marino to Sicklerville (New Jersey) | 2,389.63 mi (3,845.73 km) |
| San Marino to Sidney (Ohio) | 1,903.71 mi (3,063.73 km) |
| San Marino to Sierra Madre (California) | 4.81 mi (7.74 km) |
| San Marino to Sierra Vista (Arizona) | 485.81 mi (781.83 km) |
| San Marino to Sierra Vista Southeast (Arizona) | 494.23 mi (795.39 km) |
| San Marino to Signal Hill (California) | 22.29 mi (35.87 km) |
| San Marino to Sikeston (Missouri) | 1,609.77 mi (2,590.67 km) |
| San Marino to Siloam Springs (Arkansas) | 1,336.45 mi (2,150.81 km) |
