| Oskaloosa to Smolyan | 5,502.46 mi (8,855.36 km) |
| Oskaloosa to Sofia | 5,398.17 mi (8,687.52 km) |
| Oskaloosa to Sopot | 5,450.11 mi (8,771.10 km) |
| Oskaloosa to Sozopol | 5,562.53 mi (8,952.03 km) |
| Oskaloosa to Sredets | 5,549.17 mi (8,930.53 km) |
| Oskaloosa to Stamboliyski | 5,468.75 mi (8,801.11 km) |
| Oskaloosa to Stara Zagora | 5,492.12 mi (8,838.72 km) |
| Oskaloosa to Svilengrad | 5,545.20 mi (8,924.14 km) |
| Oskaloosa to Svishtov | 5,421.57 mi (8,725.17 km) |
| Oskaloosa to Targovishte | 5,481.92 mi (8,822.30 km) |
| Oskaloosa to Teteven | 5,419.92 mi (8,722.51 km) |
| Oskaloosa to Troyan | 5,437.14 mi (8,750.23 km) |
| Oskaloosa to Tryavna | 5,464.85 mi (8,794.83 km) |
| Oskaloosa to Tutrakan | 5,441.89 mi (8,757.88 km) |
| Oskaloosa to Varna | 5,528.09 mi (8,896.60 km) |
