| Kazlu Ruda to Smolyan | 911.37 mi (1,466.72 km) |
| Kazlu Ruda to Sofia | 832.61 mi (1,339.96 km) |
| Kazlu Ruda to Sopot | 837.93 mi (1,348.53 km) |
| Kazlu Ruda to Sozopol | 873.10 mi (1,405.12 km) |
| Kazlu Ruda to Sredets | 873.00 mi (1,404.95 km) |
| Kazlu Ruda to Stamboliyski | 872.99 mi (1,404.94 km) |
| Kazlu Ruda to Stara Zagora | 856.55 mi (1,378.48 km) |
| Kazlu Ruda to Svilengrad | 905.44 mi (1,457.17 km) |
| Kazlu Ruda to Svishtov | 773.69 mi (1,245.13 km) |
| Kazlu Ruda to Targovishte | 806.57 mi (1,298.04 km) |
| Kazlu Ruda to Teteven | 818.33 mi (1,316.98 km) |
| Kazlu Ruda to Troyan | 821.74 mi (1,322.47 km) |
| Kazlu Ruda to Tryavna | 825.98 mi (1,329.29 km) |
| Kazlu Ruda to Tutrakan | 752.27 mi (1,210.66 km) |
| Kazlu Ruda to Varna | 821.24 mi (1,321.65 km) |
