| Olton to Smolyan | 1,444.33 mi (2,324.43 km) |
| Olton to Sofia | 1,341.08 mi (2,158.26 km) |
| Olton to Sopot | 1,399.73 mi (2,252.64 km) |
| Olton to Sozopol | 1,528.59 mi (2,460.03 km) |
| Olton to Sredets | 1,511.09 mi (2,431.86 km) |
| Olton to Stamboliyski | 1,413.41 mi (2,274.67 km) |
| Olton to Stara Zagora | 1,445.03 mi (2,325.55 km) |
| Olton to Svilengrad | 1,495.80 mi (2,407.25 km) |
| Olton to Svishtov | 1,383.84 mi (2,227.08 km) |
| Olton to Targovishte | 1,448.85 mi (2,331.71 km) |
| Olton to Teteven | 1,369.07 mi (2,203.31 km) |
| Olton to Troyan | 1,388.51 mi (2,234.58 km) |
| Olton to Tryavna | 1,420.70 mi (2,286.39 km) |
| Olton to Tutrakan | 1,418.48 mi (2,282.83 km) |
| Olton to Varna | 1,504.72 mi (2,421.62 km) |
