| Horbury to Smolyan | 1,466.82 mi (2,360.62 km) |
| Horbury to Sofia | 1,362.87 mi (2,193.34 km) |
| Horbury to Sopot | 1,418.84 mi (2,283.41 km) |
| Horbury to Sozopol | 1,542.92 mi (2,483.09 km) |
| Horbury to Sredets | 1,526.52 mi (2,456.69 km) |
| Horbury to Stamboliyski | 1,434.58 mi (2,308.73 km) |
| Horbury to Stara Zagora | 1,463.09 mi (2,354.62 km) |
| Horbury to Svilengrad | 1,514.83 mi (2,437.88 km) |
| Horbury to Svishtov | 1,398.64 mi (2,250.89 km) |
| Horbury to Targovishte | 1,462.59 mi (2,353.81 km) |
| Horbury to Teteven | 1,388.27 mi (2,234.21 km) |
| Horbury to Troyan | 1,406.93 mi (2,264.24 km) |
| Horbury to Tryavna | 1,437.67 mi (2,313.71 km) |
| Horbury to Tutrakan | 1,429.51 mi (2,300.58 km) |
| Horbury to Varna | 1,516.20 mi (2,440.09 km) |
