| Fostoria to Smolyan | 5,169.94 mi (8,320.21 km) |
| Fostoria to Sofia | 5,066.22 mi (8,153.29 km) |
| Fostoria to Sopot | 5,122.48 mi (8,243.83 km) |
| Fostoria to Sozopol | 5,243.66 mi (8,438.86 km) |
| Fostoria to Sredets | 5,228.32 mi (8,414.16 km) |
| Fostoria to Stamboliyski | 5,138.12 mi (8,269.00 km) |
| Fostoria to Stara Zagora | 5,166.47 mi (8,314.63 km) |
| Fostoria to Svilengrad | 5,218.42 mi (8,398.24 km) |
| Fostoria to Svishtov | 5,100.25 mi (8,208.06 km) |
| Fostoria to Targovishte | 5,163.01 mi (8,309.06 km) |
| Fostoria to Teteven | 5,091.92 mi (8,194.66 km) |
| Fostoria to Troyan | 5,110.45 mi (8,224.47 km) |
| Fostoria to Tryavna | 5,140.64 mi (8,273.06 km) |
| Fostoria to Tutrakan | 5,126.71 mi (8,250.64 km) |
| Fostoria to Varna | 5,213.51 mi (8,390.34 km) |
