| Koyulhisar to Smolyan | 690.26 mi (1,110.86 km) |
| Koyulhisar to Sofia | 767.33 mi (1,234.90 km) |
| Koyulhisar to Sopot | 695.45 mi (1,119.22 km) |
| Koyulhisar to Sozopol | 544.86 mi (876.86 km) |
| Koyulhisar to Sredets | 568.95 mi (915.63 km) |
| Koyulhisar to Stamboliyski | 701.77 mi (1,129.39 km) |
| Koyulhisar to Stara Zagora | 647.85 mi (1,042.62 km) |
| Koyulhisar to Svilengrad | 614.01 mi (988.15 km) |
| Koyulhisar to Svishtov | 680.00 mi (1,094.35 km) |
| Koyulhisar to Targovishte | 613.60 mi (987.50 km) |
| Koyulhisar to Teteven | 722.66 mi (1,163.00 km) |
| Koyulhisar to Troyan | 699.83 mi (1,126.26 km) |
| Koyulhisar to Tryavna | 660.66 mi (1,063.23 km) |
| Koyulhisar to Tutrakan | 629.08 mi (1,012.41 km) |
| Koyulhisar to Varna | 548.68 mi (883.02 km) |
