| Potomac to Santa Ursula | 3,499.70 mi (5,632.23 km) |
| Potomac to Santander | 3,699.32 mi (5,953.49 km) |
| Potomac to Santany | 4,144.79 mi (6,670.40 km) |
| Potomac to Santiago de Compostela | 3,491.48 mi (5,618.99 km) |
| Potomac to Santiago del Teide | 3,486.83 mi (5,611.51 km) |
| Potomac to Santiponce | 3,759.36 mi (6,050.10 km) |
| Potomac to Santomera | 3,985.55 mi (6,414.12 km) |
| Potomac to Santona | 3,716.01 mi (5,980.34 km) |
| Potomac to Santurce-Antiguo | 3,738.72 mi (6,016.88 km) |
| Potomac to Sarria | 3,547.24 mi (5,708.74 km) |
| Potomac to Sauzal | 3,500.87 mi (5,634.10 km) |
| Potomac to Sedavi | 3,975.42 mi (6,397.82 km) |
| Potomac to Segorbe | 3,957.49 mi (6,368.96 km) |
| Potomac to Segovia | 3,752.43 mi (6,038.96 km) |
| Potomac to Senmanat | 4,027.62 mi (6,481.82 km) |
