| Karhula to Smolyan | 1,311.50 mi (2,110.66 km) |
| Karhula to Sofia | 1,240.16 mi (1,995.85 km) |
| Karhula to Sopot | 1,237.78 mi (1,992.01 km) |
| Karhula to Sozopol | 1,250.92 mi (2,013.16 km) |
| Karhula to Sredets | 1,255.16 mi (2,019.99 km) |
| Karhula to Stamboliyski | 1,274.11 mi (2,050.48 km) |
| Karhula to Stara Zagora | 1,250.52 mi (2,012.52 km) |
| Karhula to Svilengrad | 1,295.79 mi (2,085.37 km) |
| Karhula to Svishtov | 1,169.45 mi (1,882.05 km) |
| Karhula to Targovishte | 1,193.02 mi (1,919.98 km) |
| Karhula to Teteven | 1,221.07 mi (1,965.12 km) |
| Karhula to Troyan | 1,221.80 mi (1,966.29 km) |
| Karhula to Tryavna | 1,220.88 mi (1,964.81 km) |
| Karhula to Tutrakan | 1,137.73 mi (1,831.00 km) |
| Karhula to Varna | 1,195.93 mi (1,924.67 km) |
