| Harsum to Smolyan | 1,007.67 mi (1,621.69 km) |
| Harsum to Sofia | 903.59 mi (1,454.19 km) |
| Harsum to Sopot | 952.54 mi (1,532.96 km) |
| Harsum to Sozopol | 1,066.53 mi (1,716.41 km) |
| Harsum to Sredets | 1,052.06 mi (1,693.13 km) |
| Harsum to Stamboliyski | 972.68 mi (1,565.37 km) |
| Harsum to Stara Zagora | 994.08 mi (1,599.82 km) |
| Harsum to Svilengrad | 1,047.28 mi (1,685.43 km) |
| Harsum to Svishtov | 924.13 mi (1,487.24 km) |
| Harsum to Targovishte | 985.81 mi (1,586.51 km) |
| Harsum to Teteven | 922.55 mi (1,484.70 km) |
| Harsum to Troyan | 939.32 mi (1,511.68 km) |
| Harsum to Tryavna | 966.79 mi (1,555.91 km) |
| Harsum to Tutrakan | 948.99 mi (1,527.25 km) |
| Harsum to Varna | 1,035.81 mi (1,666.97 km) |
