| Potomac to Shoreview (Minnesota) | 916.94 mi (1,475.67 km) |
| Potomac to Shorewood (Illinois) | 605.70 mi (974.79 km) |
| Potomac to Shorewood (Wisconsin) | 623.62 mi (1,003.62 km) |
| Potomac to Short Hills (New Jersey) | 193.12 mi (310.80 km) |
| Potomac to Short Pump (Virginia) | 96.71 mi (155.63 km) |
| Potomac to Show Low (Arizona) | 1,839.90 mi (2,961.03 km) |
| Potomac to Shreveport (Louisiana) | 1,032.98 mi (1,662.42 km) |
| Potomac to Sicklerville (New Jersey) | 127.93 mi (205.89 km) |
| Potomac to Sidney (Ohio) | 381.12 mi (613.35 km) |
| Potomac to Sierra Madre (California) | 2,271.90 mi (3,656.28 km) |
| Potomac to Sierra Vista (Arizona) | 1,925.84 mi (3,099.34 km) |
| Potomac to Sierra Vista Southeast (Arizona) | 1,923.74 mi (3,095.97 km) |
| Potomac to Signal Hill (California) | 2,287.20 mi (3,680.89 km) |
| Potomac to Sikeston (Missouri) | 690.47 mi (1,111.21 km) |
| Potomac to Siloam Springs (Arkansas) | 967.42 mi (1,556.91 km) |
