| Gaithersburg to Southern Pines (North Carolina) | 297.85 mi (479.34 km) |
| Gaithersburg to Southfield (Michigan) | 391.42 mi (629.94 km) |
| Gaithersburg to Southgate (Michigan) | 378.82 mi (609.66 km) |
| Gaithersburg to Southlake (Texas) | 1,189.72 mi (1,914.67 km) |
| Gaithersburg to Spanaway (Washington) | 2,311.46 mi (3,719.93 km) |
| Gaithersburg to Spanish Fork (Utah) | 1,821.98 mi (2,932.19 km) |
| Gaithersburg to Spanish Lake (Missouri) | 697.95 mi (1,123.24 km) |
| Gaithersburg to Spanish Springs (Nevada) | 2,245.65 mi (3,614.02 km) |
| Gaithersburg to Sparks (Nevada) | 2,249.37 mi (3,620.01 km) |
| Gaithersburg to Spartanburg (South Carolina) | 388.93 mi (625.92 km) |
| Gaithersburg to Spearfish (South Dakota) | 1,412.07 mi (2,272.51 km) |
| Gaithersburg to Speedway (Indiana) | 483.88 mi (778.73 km) |
| Gaithersburg to Spencer (Iowa) | 971.60 mi (1,563.64 km) |
| Gaithersburg to Spokane (Washington) | 2,077.50 mi (3,343.42 km) |
| Gaithersburg to Spokane Valley (Washington) | 2,068.27 mi (3,328.55 km) |
