| Houghton Regis to Sereflikochisar | 1,855.28 mi (2,985.78 km) |
| Houghton Regis to Serik | 1,850.42 mi (2,977.96 km) |
| Houghton Regis to Serinhisar | 1,746.21 mi (2,810.25 km) |
| Houghton Regis to Serinyol | 2,082.11 mi (3,350.83 km) |
| Houghton Regis to Seydisehir | 1,856.48 mi (2,987.71 km) |
| Houghton Regis to Seyhan | 2,017.90 mi (3,247.50 km) |
| Houghton Regis to Seyitgazi | 1,716.50 mi (2,762.43 km) |
| Houghton Regis to Siirt | 2,250.69 mi (3,622.14 km) |
| Houghton Regis to Sile | 1,596.79 mi (2,569.79 km) |
| Houghton Regis to Silifke | 1,989.57 mi (3,201.90 km) |
| Houghton Regis to Silivri | 1,545.43 mi (2,487.14 km) |
| Houghton Regis to Silopi | 2,302.63 mi (3,705.72 km) |
| Houghton Regis to Simav | 1,664.05 mi (2,678.03 km) |
| Houghton Regis to Sinanpasa | 1,730.16 mi (2,784.42 km) |
| Houghton Regis to Sindirgi | 1,624.61 mi (2,614.55 km) |
