| Horten to Smolyan | 1,376.07 mi (2,214.57 km) |
| Horten to Sofia | 1,278.69 mi (2,057.86 km) |
| Horten to Sopot | 1,308.79 mi (2,106.30 km) |
| Horten to Sozopol | 1,385.74 mi (2,230.14 km) |
| Horten to Sredets | 1,378.79 mi (2,218.95 km) |
| Horten to Stamboliyski | 1,337.60 mi (2,152.65 km) |
| Horten to Stara Zagora | 1,340.64 mi (2,157.55 km) |
| Horten to Svilengrad | 1,394.14 mi (2,243.65 km) |
| Horten to Svishtov | 1,259.85 mi (2,027.54 km) |
| Horten to Targovishte | 1,309.20 mi (2,106.95 km) |
| Horten to Teteven | 1,282.35 mi (2,063.75 km) |
| Horten to Troyan | 1,293.29 mi (2,081.34 km) |
| Horten to Tryavna | 1,310.16 mi (2,108.49 km) |
| Horten to Tutrakan | 1,260.42 mi (2,028.45 km) |
| Horten to Varna | 1,341.33 mi (2,158.66 km) |
