| Potomac to Seysses | 3,933.71 mi (6,330.69 km) |
| Potomac to Sin-le-Noble | 3,825.87 mi (6,157.14 km) |
| Potomac to Six-Fours-les-Plages | 4,149.55 mi (6,678.06 km) |
| Potomac to Soissons | 3,859.78 mi (6,211.71 km) |
| Potomac to Soisy-sous-Montmorency | 3,827.11 mi (6,159.14 km) |
| Potomac to Sollies-Pont | 4,156.66 mi (6,689.50 km) |
| Potomac to Somain | 3,832.87 mi (6,168.41 km) |
| Potomac to Sorgues | 4,079.03 mi (6,564.56 km) |
| Potomac to Sotteville-les-Rouen | 3,765.64 mi (6,060.22 km) |
| Potomac to Soyaux | 3,823.86 mi (6,153.91 km) |
| Potomac to Stains | 3,831.60 mi (6,166.37 km) |
| Potomac to Stiring-Wendel | 4,013.95 mi (6,459.83 km) |
| Potomac to Strasbourg | 4,065.51 mi (6,542.81 km) |
| Potomac to Sucy-en-Brie | 3,842.15 mi (6,183.34 km) |
| Potomac to Suresnes | 3,826.78 mi (6,158.61 km) |
