| Hornchurch to Sinop | 1,758.43 mi (2,829.92 km) |
| Hornchurch to Siran | 2,000.71 mi (3,219.83 km) |
| Hornchurch to Sirnak | 2,255.34 mi (3,629.62 km) |
| Hornchurch to Sirvan | 2,213.43 mi (3,562.18 km) |
| Hornchurch to Sivas | 1,929.36 mi (3,105.00 km) |
| Hornchurch to Sivasli | 1,681.80 mi (2,706.60 km) |
| Hornchurch to Siverek | 2,112.33 mi (3,399.47 km) |
| Hornchurch to Sivrice | 2,081.76 mi (3,350.27 km) |
| Hornchurch to Sivrihisar | 1,713.52 mi (2,757.65 km) |
| Hornchurch to Sogut | 1,632.90 mi (2,627.89 km) |
| Hornchurch to Sogutlu | 1,607.55 mi (2,587.10 km) |
| Hornchurch to Soke | 1,626.69 mi (2,617.91 km) |
| Hornchurch to Solhan | 2,133.43 mi (3,433.42 km) |
| Hornchurch to Soma | 1,566.29 mi (2,520.71 km) |
| Hornchurch to Sorgun | 1,849.71 mi (2,976.82 km) |
