| Harpenden to Sereflikochisar | 1,846.61 mi (2,971.83 km) |
| Harpenden to Serik | 1,841.39 mi (2,963.43 km) |
| Harpenden to Serinhisar | 1,737.12 mi (2,795.63 km) |
| Harpenden to Serinyol | 2,073.37 mi (3,336.76 km) |
| Harpenden to Seydisehir | 1,847.54 mi (2,973.32 km) |
| Harpenden to Seyhan | 2,009.16 mi (3,233.43 km) |
| Harpenden to Seyitgazi | 1,707.68 mi (2,748.24 km) |
| Harpenden to Siirt | 2,242.54 mi (3,609.03 km) |
| Harpenden to Sile | 1,588.10 mi (2,555.80 km) |
| Harpenden to Silifke | 1,980.67 mi (3,187.59 km) |
| Harpenden to Silivri | 1,536.62 mi (2,472.96 km) |
| Harpenden to Silopi | 2,294.44 mi (3,692.55 km) |
| Harpenden to Simav | 1,655.07 mi (2,663.58 km) |
| Harpenden to Sinanpasa | 1,721.23 mi (2,770.06 km) |
| Harpenden to Sindirgi | 1,615.59 mi (2,600.05 km) |
