| Kingsport to Smolyan | 5,353.31 mi (8,615.31 km) |
| Kingsport to Sofia | 5,250.60 mi (8,450.02 km) |
| Kingsport to Sopot | 5,309.86 mi (8,545.39 km) |
| Kingsport to Sozopol | 5,436.90 mi (8,749.85 km) |
| Kingsport to Sredets | 5,420.18 mi (8,722.93 km) |
| Kingsport to Stamboliyski | 5,323.12 mi (8,566.73 km) |
| Kingsport to Stara Zagora | 5,355.10 mi (8,618.20 km) |
| Kingsport to Svilengrad | 5,405.92 mi (8,699.99 km) |
| Kingsport to Svishtov | 5,292.47 mi (8,517.40 km) |
| Kingsport to Targovishte | 5,356.64 mi (8,620.68 km) |
| Kingsport to Teteven | 5,279.20 mi (8,496.05 km) |
| Kingsport to Troyan | 5,298.61 mi (8,527.29 km) |
| Kingsport to Tryavna | 5,330.49 mi (8,578.59 km) |
| Kingsport to Tutrakan | 5,323.23 mi (8,566.92 km) |
| Kingsport to Varna | 5,410.01 mi (8,706.56 km) |
