| Potomac to Roeselare | 3,811.72 mi (6,134.36 km) |
| Potomac to Ronse | 3,835.98 mi (6,173.41 km) |
| Potomac to Rotselaar | 3,875.82 mi (6,237.53 km) |
| Potomac to Rumst | 3,860.55 mi (6,212.96 km) |
| Potomac to Saint-Ghislain | 3,852.46 mi (6,199.93 km) |
| Potomac to Saint-Nicolas | 3,917.40 mi (6,304.45 km) |
| Potomac to Saint-Vith | 3,951.15 mi (6,358.77 km) |
| Potomac to Scherpenheuvel | 3,884.84 mi (6,252.04 km) |
| Potomac to Schilde | 3,862.74 mi (6,216.48 km) |
| Potomac to Schoten | 3,859.63 mi (6,211.48 km) |
| Potomac to Seneffe | 3,867.98 mi (6,224.91 km) |
| Potomac to Seraing | 3,917.39 mi (6,304.43 km) |
| Potomac to Sint-Amandsberg | 3,834.35 mi (6,170.79 km) |
| Potomac to Sint-Andries | 3,807.82 mi (6,128.10 km) |
| Potomac to Sint-Genesius-Rode | 3,866.42 mi (6,222.40 km) |
