| Gahanna to Smolyan | 5,201.74 mi (8,371.39 km) |
| Gahanna to Sofia | 5,098.26 mi (8,204.85 km) |
| Gahanna to Sopot | 5,155.42 mi (8,296.85 km) |
| Gahanna to Sozopol | 5,278.39 mi (8,494.74 km) |
| Gahanna to Sredets | 5,262.63 mi (8,469.38 km) |
| Gahanna to Stamboliyski | 5,170.38 mi (8,320.92 km) |
| Gahanna to Stara Zagora | 5,199.80 mi (8,368.27 km) |
| Gahanna to Svilengrad | 5,251.45 mi (8,451.39 km) |
| Gahanna to Svishtov | 5,134.60 mi (8,263.34 km) |
| Gahanna to Targovishte | 5,197.81 mi (8,365.06 km) |
| Gahanna to Teteven | 5,124.82 mi (8,247.61 km) |
| Gahanna to Troyan | 5,143.62 mi (8,277.85 km) |
| Gahanna to Tryavna | 5,174.32 mi (8,327.26 km) |
| Gahanna to Tutrakan | 5,162.34 mi (8,307.99 km) |
| Gahanna to Varna | 5,249.18 mi (8,447.74 km) |
