| Letchworth to Solofra | 1,049.06 mi (1,688.30 km) |
| Letchworth to Somma Lombardo | 594.24 mi (956.34 km) |
| Letchworth to Somma Vesuviana | 1,033.78 mi (1,663.71 km) |
| Letchworth to Sommacampagna | 678.35 mi (1,091.69 km) |
| Letchworth to Sona | 676.13 mi (1,088.12 km) |
| Letchworth to Sondrio | 607.32 mi (977.38 km) |
| Letchworth to Sora | 961.59 mi (1,547.53 km) |
| Letchworth to Sorbolo | 693.38 mi (1,115.88 km) |
| Letchworth to Soresina | 651.48 mi (1,048.46 km) |
| Letchworth to Sorisole | 621.79 mi (1,000.68 km) |
| Letchworth to Sorrento | 1,045.33 mi (1,682.29 km) |
| Letchworth to Sorso | 877.64 mi (1,412.43 km) |
| Letchworth to Sortino | 1,263.99 mi (2,034.19 km) |
| Letchworth to Soverato Marina | 1,222.10 mi (1,966.79 km) |
| Letchworth to Sovicille | 801.72 mi (1,290.24 km) |
