| Mlada Boleslav to Smolyan | 768.82 mi (1,237.29 km) |
| Mlada Boleslav to Sofia | 665.59 mi (1,071.16 km) |
| Mlada Boleslav to Sopot | 710.59 mi (1,143.58 km) |
| Mlada Boleslav to Sozopol | 820.56 mi (1,320.56 km) |
| Mlada Boleslav to Sredets | 806.63 mi (1,298.15 km) |
| Mlada Boleslav to Stamboliyski | 732.71 mi (1,179.19 km) |
| Mlada Boleslav to Stara Zagora | 750.76 mi (1,208.23 km) |
| Mlada Boleslav to Svilengrad | 804.34 mi (1,294.46 km) |
| Mlada Boleslav to Svishtov | 678.96 mi (1,092.68 km) |
| Mlada Boleslav to Targovishte | 739.84 mi (1,190.66 km) |
| Mlada Boleslav to Teteven | 681.06 mi (1,096.06 km) |
| Mlada Boleslav to Troyan | 696.84 mi (1,121.46 km) |
| Mlada Boleslav to Tryavna | 722.82 mi (1,163.27 km) |
| Mlada Boleslav to Tutrakan | 702.32 mi (1,130.27 km) |
| Mlada Boleslav to Varna | 789.12 mi (1,269.96 km) |
