| Letchworth to Seysses | 590.24 mi (949.89 km) |
| Letchworth to Sin-le-Noble | 182.79 mi (294.18 km) |
| Letchworth to Six-Fours-les-Plages | 674.58 mi (1,085.63 km) |
| Letchworth to Soissons | 237.40 mi (382.05 km) |
| Letchworth to Soisy-sous-Montmorency | 234.60 mi (377.55 km) |
| Letchworth to Sollies-Pont | 673.26 mi (1,083.51 km) |
| Letchworth to Somain | 188.82 mi (303.87 km) |
| Letchworth to Sorgues | 598.70 mi (963.51 km) |
| Letchworth to Sotteville-les-Rouen | 186.64 mi (300.38 km) |
| Letchworth to Soyaux | 438.32 mi (705.41 km) |
| Letchworth to Stains | 238.67 mi (384.10 km) |
| Letchworth to Stiring-Wendel | 367.81 mi (591.93 km) |
| Letchworth to Strasbourg | 422.74 mi (680.34 km) |
| Letchworth to Sucy-en-Brie | 252.65 mi (406.60 km) |
| Letchworth to Suresnes | 240.27 mi (386.67 km) |
