| Kirkel to Smolyan | 996.50 mi (1,603.71 km) |
| Kirkel to Sofia | 893.96 mi (1,438.68 km) |
| Kirkel to Sopot | 954.76 mi (1,536.53 km) |
| Kirkel to Sozopol | 1,088.62 mi (1,751.97 km) |
| Kirkel to Sredets | 1,069.78 mi (1,721.64 km) |
| Kirkel to Stamboliyski | 966.59 mi (1,555.58 km) |
| Kirkel to Stara Zagora | 1,000.97 mi (1,610.90 km) |
| Kirkel to Svilengrad | 1,050.59 mi (1,690.77 km) |
| Kirkel to Svishtov | 944.04 mi (1,519.28 km) |
| Kirkel to Targovishte | 1,010.13 mi (1,625.65 km) |
| Kirkel to Teteven | 924.12 mi (1,487.23 km) |
| Kirkel to Troyan | 944.27 mi (1,519.65 km) |
| Kirkel to Tryavna | 977.93 mi (1,573.83 km) |
| Kirkel to Tutrakan | 984.16 mi (1,583.85 km) |
| Kirkel to Varna | 1,069.04 mi (1,720.45 km) |
