| Potomac to Salisbury (New York) | 226.76 mi (364.93 km) |
| Potomac to Salisbury (North Carolina) | 293.73 mi (472.71 km) |
| Potomac to Salmon Creek (Washington) | 2,334.44 mi (3,756.92 km) |
| Potomac to Salt Lake City (Utah) | 1,833.36 mi (2,950.51 km) |
| Potomac to Sammamish (Washington) | 2,297.07 mi (3,696.78 km) |
| Potomac to San Angelo (Texas) | 1,407.94 mi (2,265.86 km) |
| Potomac to San Anselmo (California) | 2,428.86 mi (3,908.87 km) |
| Potomac to San Antonio (Texas) | 1,380.61 mi (2,221.88 km) |
| Potomac to San Benito (Texas) | 1,480.72 mi (2,382.98 km) |
| Potomac to San Bernardino (California) | 2,232.08 mi (3,592.19 km) |
| Potomac to San Bruno (California) | 2,428.55 mi (3,908.37 km) |
| Potomac to San Buenaventura (California) | 2,332.52 mi (3,753.82 km) |
| Potomac to San Carlos (California) | 2,422.49 mi (3,898.62 km) |
| Potomac to San Carlos Park (Florida) | 906.64 mi (1,459.09 km) |
| Potomac to San Clemente (California) | 2,266.18 mi (3,647.06 km) |
