| Bowling Green to Smolyan | 5,487.16 mi (8,830.72 km) |
| Bowling Green to Sofia | 5,383.74 mi (8,664.29 km) |
| Bowling Green to Sopot | 5,441.10 mi (8,756.60 km) |
| Bowling Green to Sozopol | 5,564.32 mi (8,954.91 km) |
| Bowling Green to Sredets | 5,548.52 mi (8,929.47 km) |
| Bowling Green to Stamboliyski | 5,455.90 mi (8,780.43 km) |
| Bowling Green to Stara Zagora | 5,485.54 mi (8,828.13 km) |
| Bowling Green to Svilengrad | 5,537.13 mi (8,911.16 km) |
| Bowling Green to Svishtov | 5,420.50 mi (8,723.45 km) |
| Bowling Green to Targovishte | 5,483.76 mi (8,825.25 km) |
| Bowling Green to Teteven | 5,410.49 mi (8,707.34 km) |
| Bowling Green to Troyan | 5,429.33 mi (8,737.67 km) |
| Bowling Green to Tryavna | 5,460.12 mi (8,787.21 km) |
| Bowling Green to Tutrakan | 5,448.36 mi (8,768.29 km) |
| Bowling Green to Varna | 5,535.20 mi (8,908.04 km) |
