| San Marino to Superior (Colorado) | 818.45 mi (1,317.17 km) |
| San Marino to Superior (Wisconsin) | 1,610.10 mi (2,591.20 km) |
| San Marino to Surprise (Arizona) | 326.06 mi (524.75 km) |
| San Marino to Susanville (California) | 456.30 mi (734.34 km) |
| San Marino to Sussex (Wisconsin) | 1,718.07 mi (2,764.96 km) |
| San Marino to Suwanee (Georgia) | 1,938.91 mi (3,120.38 km) |
| San Marino to Swansea (Illinois) | 1,588.63 mi (2,556.66 km) |
| San Marino to Sweetwater (Florida) | 2,317.50 mi (3,729.65 km) |
| San Marino to Sweetwater (Texas) | 1,027.49 mi (1,653.58 km) |
| San Marino to Sycamore (Illinois) | 1,681.17 mi (2,705.58 km) |
| San Marino to Sylacauga (Alabama) | 1,825.76 mi (2,938.27 km) |
| San Marino to Sylvania (Ohio) | 1,932.99 mi (3,110.85 km) |
| San Marino to Syosset (New York) | 2,462.61 mi (3,963.19 km) |
| San Marino to Syracuse (New York) | 2,322.99 mi (3,738.50 km) |
| San Marino to Syracuse (Utah) | 583.53 mi (939.10 km) |
