| Katy to Smolyan | 6,218.63 mi (10,007.92 km) |
| Katy to Sofia | 6,115.01 mi (9,841.16 km) |
| Katy to Sopot | 6,171.57 mi (9,932.19 km) |
| Katy to Sozopol | 6,292.95 mi (10,127.53 km) |
| Katy to Sredets | 6,277.61 mi (10,102.84 km) |
| Katy to Stamboliyski | 6,187.00 mi (9,957.01 km) |
| Katy to Stara Zagora | 6,215.65 mi (10,003.13 km) |
| Katy to Svilengrad | 6,267.54 mi (10,086.64 km) |
| Katy to Svishtov | 6,149.54 mi (9,896.73 km) |
| Katy to Targovishte | 6,212.29 mi (9,997.72 km) |
| Katy to Teteven | 6,141.01 mi (9,883.00 km) |
| Katy to Troyan | 6,159.60 mi (9,912.92 km) |
| Katy to Tryavna | 6,189.88 mi (9,961.65 km) |
| Katy to Tutrakan | 6,175.89 mi (9,939.13 km) |
| Katy to Varna | 6,262.68 mi (10,078.81 km) |
