| Rockville to San Luis Obispo (California) | 2,387.19 mi (3,841.82 km) |
| Rockville to San Marcos (California) | 2,252.79 mi (3,625.51 km) |
| Rockville to San Marcos (Texas) | 1,339.22 mi (2,155.27 km) |
| Rockville to San Marino (California) | 2,278.11 mi (3,666.27 km) |
| Rockville to San Mateo (California) | 2,424.79 mi (3,902.32 km) |
| Rockville to San Pablo (California) | 2,418.31 mi (3,891.90 km) |
| Rockville to San Rafael (California) | 2,427.16 mi (3,906.14 km) |
| Rockville to San Ramon (California) | 2,400.95 mi (3,863.95 km) |
| Rockville to San Tan Valley (Arizona) | 1,950.76 mi (3,139.44 km) |
| Rockville to Sand Springs (Oklahoma) | 1,056.22 mi (1,699.82 km) |
| Rockville to Sandusky (Ohio) | 334.86 mi (538.90 km) |
| Rockville to Sandy (Oregon) | 2,317.24 mi (3,729.23 km) |
| Rockville to Sandy (Utah) | 1,831.97 mi (2,948.27 km) |
| Rockville to Sandy Springs (Georgia) | 535.39 mi (861.62 km) |
| Rockville to Sanford (Florida) | 749.22 mi (1,205.75 km) |
