| Balassagyarmat to Smolyan | 520.81 mi (838.17 km) |
| Balassagyarmat to Sofia | 419.92 mi (675.79 km) |
| Balassagyarmat to Sopot | 458.90 mi (738.53 km) |
| Balassagyarmat to Sozopol | 565.27 mi (909.72 km) |
| Balassagyarmat to Sredets | 551.47 mi (887.50 km) |
| Balassagyarmat to Stamboliyski | 483.48 mi (778.09 km) |
| Balassagyarmat to Stara Zagora | 497.33 mi (800.38 km) |
| Balassagyarmat to Svilengrad | 551.18 mi (887.04 km) |
| Balassagyarmat to Svishtov | 423.99 mi (682.34 km) |
| Balassagyarmat to Targovishte | 484.56 mi (779.82 km) |
| Balassagyarmat to Teteven | 430.13 mi (692.23 km) |
| Balassagyarmat to Troyan | 444.57 mi (715.46 km) |
| Balassagyarmat to Tryavna | 468.80 mi (754.46 km) |
| Balassagyarmat to Tutrakan | 447.67 mi (720.45 km) |
| Balassagyarmat to Varna | 534.51 mi (860.21 km) |
