| Petersburg to Smolyan | 5,109.26 mi (8,222.56 km) |
| Petersburg to Sofia | 5,007.37 mi (8,058.59 km) |
| Petersburg to Sopot | 5,068.28 mi (8,156.60 km) |
| Petersburg to Sozopol | 5,198.63 mi (8,366.38 km) |
| Petersburg to Sredets | 5,181.08 mi (8,338.15 km) |
| Petersburg to Stamboliyski | 5,080.09 mi (8,175.62 km) |
| Petersburg to Stara Zagora | 5,114.17 mi (8,230.46 km) |
| Petersburg to Svilengrad | 5,164.20 mi (8,310.97 km) |
| Petersburg to Svishtov | 5,053.89 mi (8,133.45 km) |
| Petersburg to Targovishte | 5,118.81 mi (8,237.92 km) |
| Petersburg to Teteven | 5,037.63 mi (8,107.27 km) |
| Petersburg to Troyan | 5,057.52 mi (8,139.29 km) |
| Petersburg to Tryavna | 5,090.36 mi (8,192.14 km) |
| Petersburg to Tutrakan | 5,087.33 mi (8,187.26 km) |
| Petersburg to Varna | 5,173.87 mi (8,326.54 km) |
