| League City to Smolyan | 6,206.39 mi (9,988.22 km) |
| League City to Sofia | 6,102.91 mi (9,821.69 km) |
| League City to Sopot | 6,160.01 mi (9,913.58 km) |
| League City to Sozopol | 6,282.45 mi (10,110.63 km) |
| League City to Sredets | 6,266.86 mi (10,085.53 km) |
| League City to Stamboliyski | 6,175.03 mi (9,937.75 km) |
| League City to Stara Zagora | 6,204.32 mi (9,984.88 km) |
| League City to Svilengrad | 6,256.03 mi (10,068.10 km) |
| League City to Svishtov | 6,138.81 mi (9,879.46 km) |
| League City to Targovishte | 6,201.83 mi (9,980.88 km) |
| League City to Teteven | 6,129.42 mi (9,864.34 km) |
| League City to Troyan | 6,148.17 mi (9,894.52 km) |
| League City to Tryavna | 6,178.75 mi (9,943.73 km) |
| League City to Tutrakan | 6,165.92 mi (9,923.10 km) |
| League City to Varna | 6,252.75 mi (10,062.82 km) |
