| Potomac to St. Simons (Georgia) | 590.84 mi (950.87 km) |
| Potomac to Stafford (Texas) | 1,229.11 mi (1,978.07 km) |
| Potomac to Stallings (North Carolina) | 330.57 mi (532.00 km) |
| Potomac to Stamford (Connecticut) | 240.41 mi (386.91 km) |
| Potomac to Stanford (California) | 2,418.68 mi (3,892.49 km) |
| Potomac to Stanton (California) | 2,277.91 mi (3,665.95 km) |
| Potomac to Star (Idaho) | 2,044.04 mi (3,289.57 km) |
| Potomac to Starkville (Mississippi) | 752.54 mi (1,211.09 km) |
| Potomac to State College (Pennsylvania) | 127.69 mi (205.49 km) |
| Potomac to Staten Island (New York) | 194.61 mi (313.19 km) |
| Potomac to Statesboro (Georgia) | 521.82 mi (839.80 km) |
| Potomac to Statesville (North Carolina) | 300.84 mi (484.15 km) |
| Potomac to Staunton (Virginia) | 116.84 mi (188.04 km) |
| Potomac to Steamboat Springs (Colorado) | 1,569.95 mi (2,526.58 km) |
| Potomac to Steiner Ranch (Texas) | 1,314.90 mi (2,116.13 km) |
