| Potomac to Sugar Hill (Georgia) | 509.52 mi (820.00 km) |
| Potomac to Sugar Land (Texas) | 1,233.89 mi (1,985.76 km) |
| Potomac to Sugarland Run (Virginia) | 9.83 mi (15.82 km) |
| Potomac to Sugarmill Woods (Florida) | 772.64 mi (1,243.45 km) |
| Potomac to Suisun City (California) | 2,394.52 mi (3,853.61 km) |
| Potomac to Suitland (Maryland) | 18.53 mi (29.82 km) |
| Potomac to Sulphur (Louisiana) | 1,098.69 mi (1,768.17 km) |
| Potomac to Sulphur Springs (Texas) | 1,103.10 mi (1,775.27 km) |
| Potomac to Summerfield (Maryland) | 19.11 mi (30.76 km) |
| Potomac to Summerfield (North Carolina) | 244.53 mi (393.53 km) |
| Potomac to Summerlin South (Nevada) | 2,082.88 mi (3,352.07 km) |
| Potomac to Summerville (South Carolina) | 447.61 mi (720.36 km) |
| Potomac to Summit (Illinois) | 590.27 mi (949.94 km) |
| Potomac to Summit (New Jersey) | 190.60 mi (306.75 km) |
| Potomac to Sumner (Washington) | 2,307.07 mi (3,712.87 km) |
