| Siena to Seysses | 502.74 mi (809.09 km) |
| Siena to Sin-le-Noble | 621.94 mi (1,000.92 km) |
| Siena to Six-Fours-les-Plages | 277.90 mi (447.24 km) |
| Siena to Soissons | 566.26 mi (911.31 km) |
| Siena to Soisy-sous-Montmorency | 582.64 mi (937.67 km) |
| Siena to Sollies-Pont | 266.32 mi (428.60 km) |
| Siena to Somain | 616.78 mi (992.61 km) |
| Siena to Sorgues | 326.25 mi (525.04 km) |
| Siena to Sotteville-les-Rouen | 643.62 mi (1,035.81 km) |
| Siena to Soyaux | 571.29 mi (919.40 km) |
| Siena to Stains | 578.05 mi (930.28 km) |
| Siena to Stiring-Wendel | 457.38 mi (736.08 km) |
| Siena to Strasbourg | 402.38 mi (647.57 km) |
| Siena to Sucy-en-Brie | 565.31 mi (909.78 km) |
| Siena to Suresnes | 580.42 mi (934.10 km) |
