| Ironton to Smolyan | 5,264.23 mi (8,471.95 km) |
| Ironton to Sofia | 5,161.05 mi (8,305.91 km) |
| Ironton to Sopot | 5,219.15 mi (8,399.42 km) |
| Ironton to Sozopol | 5,343.94 mi (8,600.24 km) |
| Ironton to Sredets | 5,327.75 mi (8,574.19 km) |
| Ironton to Stamboliyski | 5,233.37 mi (8,422.30 km) |
| Ironton to Stara Zagora | 5,263.92 mi (8,471.46 km) |
| Ironton to Svilengrad | 5,315.23 mi (8,554.03 km) |
| Ironton to Svishtov | 5,199.83 mi (8,368.32 km) |
| Ironton to Targovishte | 5,263.48 mi (8,470.75 km) |
| Ironton to Teteven | 5,188.52 mi (8,350.12 km) |
| Ironton to Troyan | 5,207.59 mi (8,380.80 km) |
| Ironton to Tryavna | 5,238.81 mi (8,431.06 km) |
| Ironton to Tutrakan | 5,228.91 mi (8,415.11 km) |
| Ironton to Varna | 5,315.74 mi (8,554.85 km) |
