| Kuusankoski to Smolyan | 1,337.68 mi (2,152.78 km) |
| Kuusankoski to Sofia | 1,265.53 mi (2,036.67 km) |
| Kuusankoski to Sopot | 1,263.94 mi (2,034.11 km) |
| Kuusankoski to Sozopol | 1,278.44 mi (2,057.44 km) |
| Kuusankoski to Sredets | 1,282.48 mi (2,063.95 km) |
| Kuusankoski to Stamboliyski | 1,300.17 mi (2,092.43 km) |
| Kuusankoski to Stara Zagora | 1,277.15 mi (2,055.37 km) |
| Kuusankoski to Svilengrad | 1,322.68 mi (2,128.64 km) |
| Kuusankoski to Svishtov | 1,195.89 mi (1,924.60 km) |
| Kuusankoski to Targovishte | 1,220.07 mi (1,963.52 km) |
| Kuusankoski to Teteven | 1,246.95 mi (2,006.78 km) |
| Kuusankoski to Troyan | 1,247.93 mi (2,008.35 km) |
| Kuusankoski to Tryavna | 1,247.42 mi (2,007.52 km) |
| Kuusankoski to Tutrakan | 1,164.80 mi (1,874.56 km) |
| Kuusankoski to Varna | 1,223.55 mi (1,969.11 km) |
