| Hilliard to Smolyan | 5,212.72 mi (8,389.06 km) |
| Hilliard to Sofia | 5,109.20 mi (8,222.47 km) |
| Hilliard to Sopot | 5,166.24 mi (8,314.26 km) |
| Hilliard to Sozopol | 5,288.94 mi (8,511.73 km) |
| Hilliard to Sredets | 5,273.24 mi (8,486.46 km) |
| Hilliard to Stamboliyski | 5,181.29 mi (8,338.48 km) |
| Hilliard to Stara Zagora | 5,210.56 mi (8,385.59 km) |
| Hilliard to Svilengrad | 5,262.26 mi (8,468.78 km) |
| Hilliard to Svishtov | 5,145.21 mi (8,280.41 km) |
| Hilliard to Targovishte | 5,208.35 mi (8,382.03 km) |
| Hilliard to Teteven | 5,135.64 mi (8,265.02 km) |
| Hilliard to Troyan | 5,154.40 mi (8,295.20 km) |
| Hilliard to Tryavna | 5,185.02 mi (8,344.49 km) |
| Hilliard to Tutrakan | 5,172.76 mi (8,324.75 km) |
| Hilliard to Varna | 5,259.59 mi (8,464.49 km) |
