| Horizon City to Smolyan | 6,488.29 mi (10,441.90 km) |
| Horizon City to Sofia | 6,384.04 mi (10,274.11 km) |
| Horizon City to Sopot | 6,433.58 mi (10,353.84 km) |
| Horizon City to Sozopol | 6,540.67 mi (10,526.19 km) |
| Horizon City to Sredets | 6,528.53 mi (10,506.65 km) |
| Horizon City to Stamboliyski | 6,453.73 mi (10,386.27 km) |
| Horizon City to Stara Zagora | 6,474.39 mi (10,419.52 km) |
| Horizon City to Svilengrad | 6,527.89 mi (10,505.63 km) |
| Horizon City to Svishtov | 6,401.68 mi (10,302.51 km) |
| Horizon City to Targovishte | 6,460.41 mi (10,397.03 km) |
| Horizon City to Teteven | 6,403.68 mi (10,305.73 km) |
| Horizon City to Troyan | 6,420.16 mi (10,332.24 km) |
| Horizon City to Tryavna | 6,446.42 mi (10,374.51 km) |
| Horizon City to Tutrakan | 6,418.33 mi (10,329.30 km) |
| Horizon City to Varna | 6,503.78 mi (10,466.83 km) |
