| Orpington to Smolyan | 1,342.46 mi (2,160.47 km) |
| Orpington to Sofia | 1,239.71 mi (1,995.12 km) |
| Orpington to Sopot | 1,299.73 mi (2,091.71 km) |
| Orpington to Sozopol | 1,431.21 mi (2,303.31 km) |
| Orpington to Sredets | 1,413.06 mi (2,274.10 km) |
| Orpington to Stamboliyski | 1,312.27 mi (2,111.90 km) |
| Orpington to Stara Zagora | 1,345.56 mi (2,165.46 km) |
| Orpington to Svilengrad | 1,395.70 mi (2,246.16 km) |
| Orpington to Svishtov | 1,286.42 mi (2,070.30 km) |
| Orpington to Targovishte | 1,351.98 mi (2,175.80 km) |
| Orpington to Teteven | 1,269.07 mi (2,042.37 km) |
| Orpington to Troyan | 1,288.91 mi (2,074.30 km) |
| Orpington to Tryavna | 1,321.89 mi (2,127.38 km) |
| Orpington to Tutrakan | 1,323.42 mi (2,129.84 km) |
| Orpington to Varna | 1,409.20 mi (2,267.89 km) |
