| Potomac to Shoreham-by-Sea | 3,675.30 mi (5,914.82 km) |
| Potomac to Shotley Bridge | 3,530.26 mi (5,681.41 km) |
| Potomac to Shrewsbury | 3,535.10 mi (5,689.20 km) |
| Potomac to Sidcup | 3,677.40 mi (5,918.20 km) |
| Potomac to Sidmouth | 3,555.45 mi (5,721.94 km) |
| Potomac to Sileby | 3,600.74 mi (5,794.83 km) |
| Potomac to Sittingbourne | 3,705.33 mi (5,963.16 km) |
| Potomac to Skegness | 3,649.74 mi (5,873.68 km) |
| Potomac to Skelmersdale | 3,518.45 mi (5,662.39 km) |
| Potomac to Skipton | 3,540.74 mi (5,698.27 km) |
| Potomac to Sleaford | 3,622.91 mi (5,830.51 km) |
| Potomac to Slough | 3,647.42 mi (5,869.96 km) |
| Potomac to Small Heath | 3,576.12 mi (5,755.22 km) |
| Potomac to Smethwick | 3,570.91 mi (5,746.83 km) |
| Potomac to Snaresbrook | 3,670.25 mi (5,906.70 km) |
