| Potomac to Security-Widefield (Colorado) | 1,474.60 mi (2,373.14 km) |
| Potomac to Sedalia (Missouri) | 862.11 mi (1,387.43 km) |
| Potomac to Sedro-Woolley (Washington) | 2,304.53 mi (3,708.78 km) |
| Potomac to Seguin (Texas) | 1,348.09 mi (2,169.54 km) |
| Potomac to Selden (New York) | 254.40 mi (409.42 km) |
| Potomac to Selma (Alabama) | 715.09 mi (1,150.82 km) |
| Potomac to Selma (California) | 2,301.31 mi (3,703.60 km) |
| Potomac to Selma (Texas) | 1,365.35 mi (2,197.32 km) |
| Potomac to Seminole (Florida) | 835.94 mi (1,345.32 km) |
| Potomac to Seven Hills (Ohio) | 287.36 mi (462.46 km) |
| Potomac to Seven Oaks (South Carolina) | 407.12 mi (655.19 km) |
| Potomac to Severn (Maryland) | 28.03 mi (45.12 km) |
| Potomac to Severna Park (Maryland) | 33.94 mi (54.63 km) |
| Potomac to Sevierville (Tennessee) | 410.81 mi (661.13 km) |
| Potomac to Seymour (Indiana) | 466.95 mi (751.48 km) |
