| Kluczbork to Smolyan | 718.81 mi (1,156.81 km) |
| Kluczbork to Sofia | 620.87 mi (999.19 km) |
| Kluczbork to Sopot | 652.80 mi (1,050.58 km) |
| Kluczbork to Sozopol | 741.88 mi (1,193.93 km) |
| Kluczbork to Sredets | 731.81 mi (1,177.73 km) |
| Kluczbork to Stamboliyski | 680.54 mi (1,095.22 km) |
| Kluczbork to Stara Zagora | 686.96 mi (1,105.55 km) |
| Kluczbork to Svilengrad | 740.86 mi (1,192.31 km) |
| Kluczbork to Svishtov | 608.28 mi (978.93 km) |
| Kluczbork to Targovishte | 662.61 mi (1,066.36 km) |
| Kluczbork to Teteven | 625.64 mi (1,006.87 km) |
| Kluczbork to Troyan | 637.58 mi (1,026.09 km) |
| Kluczbork to Tryavna | 656.99 mi (1,057.33 km) |
| Kluczbork to Tutrakan | 618.16 mi (994.83 km) |
| Kluczbork to Varna | 703.14 mi (1,131.59 km) |
