| Olten to Smolyan | 916.69 mi (1,475.26 km) |
| Olten to Sofia | 817.34 mi (1,315.39 km) |
| Olten to Sopot | 882.72 mi (1,420.60 km) |
| Olten to Sozopol | 1,024.10 mi (1,648.14 km) |
| Olten to Sredets | 1,003.32 mi (1,614.68 km) |
| Olten to Stamboliyski | 890.01 mi (1,432.33 km) |
| Olten to Stara Zagora | 930.28 mi (1,497.14 km) |
| Olten to Svilengrad | 977.03 mi (1,572.38 km) |
| Olten to Svishtov | 881.62 mi (1,418.83 km) |
| Olten to Targovishte | 948.47 mi (1,526.41 km) |
| Olten to Teteven | 852.51 mi (1,371.99 km) |
| Olten to Troyan | 873.92 mi (1,406.43 km) |
| Olten to Tryavna | 910.00 mi (1,464.50 km) |
| Olten to Tutrakan | 929.02 mi (1,495.11 km) |
| Olten to Varna | 1,010.90 mi (1,626.89 km) |
