| Potomac to Southern Pines (North Carolina) | 290.73 mi (467.88 km) |
| Potomac to Southfield (Michigan) | 397.40 mi (639.55 km) |
| Potomac to Southgate (Michigan) | 384.58 mi (618.92 km) |
| Potomac to Southlake (Texas) | 1,188.59 mi (1,912.85 km) |
| Potomac to Spanaway (Washington) | 2,316.36 mi (3,727.82 km) |
| Potomac to Spanish Fork (Utah) | 1,824.88 mi (2,936.86 km) |
| Potomac to Spanish Lake (Missouri) | 699.31 mi (1,125.44 km) |
| Potomac to Spanish Springs (Nevada) | 2,248.75 mi (3,619.01 km) |
| Potomac to Sparks (Nevada) | 2,252.45 mi (3,624.97 km) |
| Potomac to Spartanburg (South Carolina) | 383.62 mi (617.38 km) |
| Potomac to Spearfish (South Dakota) | 1,416.38 mi (2,279.44 km) |
| Potomac to Speedway (Indiana) | 486.14 mi (782.37 km) |
| Potomac to Spencer (Iowa) | 975.73 mi (1,570.28 km) |
| Potomac to Spokane (Washington) | 2,082.52 mi (3,351.50 km) |
| Potomac to Spokane Valley (Washington) | 2,073.29 mi (3,336.63 km) |
