| Herk-de-Stad to Sofia | 1,026.02 mi (1,651.21 km) |
| Herk-de-Stad to Sopot | 1,084.03 mi (1,744.58 km) |
| Herk-de-Stad to Sozopol | 1,212.76 mi (1,951.74 km) |
| Herk-de-Stad to Sredets | 1,195.18 mi (1,923.45 km) |
| Herk-de-Stad to Stamboliyski | 1,098.18 mi (1,767.35 km) |
| Herk-de-Stad to Stara Zagora | 1,129.20 mi (1,817.27 km) |
| Herk-de-Stad to Svilengrad | 1,180.11 mi (1,899.20 km) |
| Herk-de-Stad to Svishtov | 1,067.99 mi (1,718.77 km) |
| Herk-de-Stad to Targovishte | 1,133.11 mi (1,823.57 km) |
| Herk-de-Stad to Teteven | 1,053.38 mi (1,695.25 km) |
| Herk-de-Stad to Troyan | 1,072.71 mi (1,726.35 km) |
| Herk-de-Stad to Tryavna | 1,104.79 mi (1,777.98 km) |
| Herk-de-Stad to Tutrakan | 1,103.36 mi (1,775.69 km) |
| Herk-de-Stad to Varna | 1,189.42 mi (1,914.19 km) |
| Herk-de-Stad to Veliki Preslav | 1,146.04 mi (1,844.37 km) |
