| Boom to Sofia | 1,061.60 mi (1,708.48 km) |
| Boom to Sopot | 1,119.84 mi (1,802.22 km) |
| Boom to Sozopol | 1,248.83 mi (2,009.80 km) |
| Boom to Sredets | 1,231.21 mi (1,981.44 km) |
| Boom to Stamboliyski | 1,133.82 mi (1,824.71 km) |
| Boom to Stara Zagora | 1,165.09 mi (1,875.02 km) |
| Boom to Svilengrad | 1,215.92 mi (1,956.83 km) |
| Boom to Svishtov | 1,104.06 mi (1,776.82 km) |
| Boom to Targovishte | 1,169.22 mi (1,881.67 km) |
| Boom to Teteven | 1,089.19 mi (1,752.88 km) |
| Boom to Troyan | 1,108.57 mi (1,784.08 km) |
| Boom to Tryavna | 1,140.74 mi (1,835.85 km) |
| Boom to Tutrakan | 1,139.53 mi (1,833.89 km) |
| Boom to Varna | 1,225.58 mi (1,972.38 km) |
| Boom to Veliki Preslav | 1,182.15 mi (1,902.48 km) |
