| Billere to Smolyan | 1,280.29 mi (2,060.43 km) |
| Billere to Sofia | 1,195.64 mi (1,924.19 km) |
| Billere to Sopot | 1,267.21 mi (2,039.38 km) |
| Billere to Sozopol | 1,417.63 mi (2,281.46 km) |
| Billere to Sredets | 1,393.65 mi (2,242.86 km) |
| Billere to Stamboliyski | 1,263.42 mi (2,033.28 km) |
| Billere to Stara Zagora | 1,315.05 mi (2,116.37 km) |
| Billere to Svilengrad | 1,352.55 mi (2,176.71 km) |
| Billere to Svishtov | 1,286.26 mi (2,070.04 km) |
| Billere to Targovishte | 1,351.27 mi (2,174.66 km) |
| Billere to Teteven | 1,239.83 mi (1,995.32 km) |
| Billere to Troyan | 1,262.67 mi (2,032.07 km) |
| Billere to Tryavna | 1,301.92 mi (2,095.23 km) |
| Billere to Tutrakan | 1,344.87 mi (2,164.36 km) |
| Billere to Varna | 1,417.81 mi (2,281.75 km) |
