| Horley to Smolyan | 1,348.68 mi (2,170.49 km) |
| Horley to Sofia | 1,246.18 mi (2,005.54 km) |
| Horley to Sopot | 1,306.73 mi (2,102.98 km) |
| Horley to Sozopol | 1,439.12 mi (2,316.04 km) |
| Horley to Sredets | 1,420.75 mi (2,286.48 km) |
| Horley to Stamboliyski | 1,318.82 mi (2,122.43 km) |
| Horley to Stara Zagora | 1,352.75 mi (2,177.04 km) |
| Horley to Svilengrad | 1,402.64 mi (2,257.33 km) |
| Horley to Svishtov | 1,294.36 mi (2,083.08 km) |
| Horley to Targovishte | 1,360.08 mi (2,188.83 km) |
| Horley to Teteven | 1,276.08 mi (2,053.66 km) |
| Horley to Troyan | 1,296.07 mi (2,085.83 km) |
| Horley to Tryavna | 1,329.34 mi (2,139.36 km) |
| Horley to Tutrakan | 1,332.10 mi (2,143.81 km) |
| Horley to Varna | 1,417.72 mi (2,281.59 km) |
