| Rockville to Southern Pines (North Carolina) | 295.95 mi (476.29 km) |
| Rockville to Southfield (Michigan) | 396.05 mi (637.38 km) |
| Rockville to Southgate (Michigan) | 383.41 mi (617.04 km) |
| Rockville to Southlake (Texas) | 1,191.81 mi (1,918.04 km) |
| Rockville to Spanaway (Washington) | 2,315.88 mi (3,727.04 km) |
| Rockville to Spanish Fork (Utah) | 1,825.81 mi (2,938.35 km) |
| Rockville to Spanish Lake (Missouri) | 701.18 mi (1,128.45 km) |
| Rockville to Spanish Springs (Nevada) | 2,249.54 mi (3,620.29 km) |
| Rockville to Sparks (Nevada) | 2,253.26 mi (3,626.27 km) |
| Rockville to Spartanburg (South Carolina) | 388.51 mi (625.25 km) |
| Rockville to Spearfish (South Dakota) | 1,416.34 mi (2,279.38 km) |
| Rockville to Speedway (Indiana) | 487.46 mi (784.50 km) |
| Rockville to Spencer (Iowa) | 975.82 mi (1,570.43 km) |
| Rockville to Spokane (Washington) | 2,081.95 mi (3,350.57 km) |
| Rockville to Spokane Valley (Washington) | 2,072.71 mi (3,335.71 km) |
