| Houghton Regis to Solofra | 1,055.21 mi (1,698.20 km) |
| Houghton Regis to Somma Lombardo | 599.97 mi (965.55 km) |
| Houghton Regis to Somma Vesuviana | 1,039.75 mi (1,673.32 km) |
| Houghton Regis to Sommacampagna | 685.27 mi (1,102.84 km) |
| Houghton Regis to Sona | 683.07 mi (1,099.30 km) |
| Houghton Regis to Sondrio | 614.32 mi (988.65 km) |
| Houghton Regis to Sora | 967.58 mi (1,557.18 km) |
| Houghton Regis to Sorbolo | 699.61 mi (1,125.91 km) |
| Houghton Regis to Soresina | 657.68 mi (1,058.44 km) |
| Houghton Regis to Sorisole | 628.25 mi (1,011.08 km) |
| Houghton Regis to Sorrento | 1,051.15 mi (1,691.65 km) |
| Houghton Regis to Sorso | 880.03 mi (1,416.28 km) |
| Houghton Regis to Sortino | 1,268.65 mi (2,041.70 km) |
| Houghton Regis to Soverato Marina | 1,228.06 mi (1,976.38 km) |
| Houghton Regis to Sovicille | 807.31 mi (1,299.24 km) |
