| Welwyn Garden City to Solofra | 1,040.08 mi (1,673.84 km) |
| Welwyn Garden City to Somma Lombardo | 584.97 mi (941.42 km) |
| Welwyn Garden City to Somma Vesuviana | 1,024.68 mi (1,649.07 km) |
| Welwyn Garden City to Sommacampagna | 669.90 mi (1,078.10 km) |
| Welwyn Garden City to Sona | 667.69 mi (1,074.55 km) |
| Welwyn Garden City to Sondrio | 598.92 mi (963.87 km) |
| Welwyn Garden City to Sora | 952.50 mi (1,532.91 km) |
| Welwyn Garden City to Sorbolo | 684.44 mi (1,101.50 km) |
| Welwyn Garden City to Soresina | 642.53 mi (1,034.04 km) |
| Welwyn Garden City to Sorisole | 613.01 mi (986.55 km) |
| Welwyn Garden City to Sorrento | 1,036.13 mi (1,667.49 km) |
| Welwyn Garden City to Sorso | 866.74 mi (1,394.88 km) |
| Welwyn Garden City to Sortino | 1,254.12 mi (2,018.32 km) |
| Welwyn Garden City to Soverato Marina | 1,213.00 mi (1,952.14 km) |
| Welwyn Garden City to Sovicille | 792.38 mi (1,275.21 km) |
