| Potomac to Stephenville (Texas) | 1,267.30 mi (2,039.51 km) |
| Potomac to Sterling (Colorado) | 1,379.15 mi (2,219.52 km) |
| Potomac to Sterling (Illinois) | 684.57 mi (1,101.71 km) |
| Potomac to Sterling (Virginia) | 11.33 mi (18.23 km) |
| Potomac to Sterling Heights (Michigan) | 392.16 mi (631.12 km) |
| Potomac to Steubenville (Ohio) | 206.16 mi (331.78 km) |
| Potomac to Stevens Point (Wisconsin) | 740.70 mi (1,192.03 km) |
| Potomac to Stevenson Ranch (California) | 2,295.35 mi (3,694.01 km) |
| Potomac to Stillwater (Minnesota) | 902.45 mi (1,452.36 km) |
| Potomac to Stillwater (Oklahoma) | 1,104.40 mi (1,777.36 km) |
| Potomac to Stockbridge (Georgia) | 545.00 mi (877.10 km) |
| Potomac to Stockton (California) | 2,363.05 mi (3,802.96 km) |
| Potomac to Stone Ridge (Virginia) | 20.28 mi (32.63 km) |
| Potomac to Stonecrest (Georgia) | 533.43 mi (858.47 km) |
| Potomac to Stony Brook (New York) | 251.89 mi (405.37 km) |
