| Kerrville to Smolyan | 6,330.28 mi (10,187.61 km) |
| Kerrville to Sofia | 6,226.26 mi (10,020.20 km) |
| Kerrville to Sopot | 6,280.91 mi (10,108.15 km) |
| Kerrville to Sozopol | 6,398.40 mi (10,297.23 km) |
| Kerrville to Sredets | 6,383.95 mi (10,273.98 km) |
| Kerrville to Stamboliyski | 6,297.74 mi (10,135.23 km) |
| Kerrville to Stara Zagora | 6,324.14 mi (10,177.71 km) |
| Kerrville to Svilengrad | 6,376.61 mi (10,262.16 km) |
| Kerrville to Svishtov | 6,255.96 mi (10,068.00 km) |
| Kerrville to Targovishte | 6,317.68 mi (10,167.32 km) |
| Kerrville to Teteven | 6,250.47 mi (10,059.16 km) |
| Kerrville to Troyan | 6,268.49 mi (10,088.16 km) |
| Kerrville to Tryavna | 6,297.67 mi (10,135.12 km) |
| Kerrville to Tutrakan | 6,279.53 mi (10,105.93 km) |
| Kerrville to Varna | 6,366.13 mi (10,245.29 km) |
