| Orsta to Smolyan | 1,616.36 mi (2,601.29 km) |
| Orsta to Sofia | 1,518.66 mi (2,444.05 km) |
| Orsta to Sopot | 1,549.24 mi (2,493.25 km) |
| Orsta to Sozopol | 1,625.58 mi (2,616.11 km) |
| Orsta to Sredets | 1,618.89 mi (2,605.35 km) |
| Orsta to Stamboliyski | 1,577.93 mi (2,539.43 km) |
| Orsta to Stara Zagora | 1,581.11 mi (2,544.55 km) |
| Orsta to Svilengrad | 1,634.60 mi (2,630.63 km) |
| Orsta to Svishtov | 1,500.27 mi (2,414.46 km) |
| Orsta to Targovishte | 1,549.31 mi (2,493.38 km) |
| Orsta to Teteven | 1,522.73 mi (2,450.60 km) |
| Orsta to Troyan | 1,533.74 mi (2,468.32 km) |
| Orsta to Tryavna | 1,550.62 mi (2,495.48 km) |
| Orsta to Tutrakan | 1,500.24 mi (2,414.41 km) |
| Orsta to Varna | 1,580.67 mi (2,543.84 km) |
