| Opelika to Smolyan | 5,654.29 mi (9,099.70 km) |
| Opelika to Sofia | 5,551.98 mi (8,935.05 km) |
| Opelika to Sopot | 5,612.05 mi (9,031.72 km) |
| Opelika to Sozopol | 5,740.60 mi (9,238.60 km) |
| Opelika to Sredets | 5,723.52 mi (9,211.12 km) |
| Opelika to Stamboliyski | 5,624.61 mi (9,051.94 km) |
| Opelika to Stara Zagora | 5,657.61 mi (9,105.04 km) |
| Opelika to Svilengrad | 5,708.07 mi (9,186.25 km) |
| Opelika to Svishtov | 5,596.00 mi (9,005.90 km) |
| Opelika to Targovishte | 5,660.51 mi (9,109.71 km) |
| Opelika to Teteven | 5,581.39 mi (8,982.38 km) |
| Opelika to Troyan | 5,601.03 mi (9,013.99 km) |
| Opelika to Tryavna | 5,633.36 mi (9,066.01 km) |
| Opelika to Tutrakan | 5,627.86 mi (9,057.17 km) |
| Opelika to Varna | 5,714.57 mi (9,196.70 km) |
