| Karkkila to Smolyan | 1,309.48 mi (2,107.40 km) |
| Karkkila to Sofia | 1,232.72 mi (1,983.87 km) |
| Karkkila to Sopot | 1,235.82 mi (1,988.86 km) |
| Karkkila to Sozopol | 1,260.25 mi (2,028.18 km) |
| Karkkila to Sredets | 1,262.58 mi (2,031.93 km) |
| Karkkila to Stamboliyski | 1,271.39 mi (2,046.10 km) |
| Karkkila to Stara Zagora | 1,252.04 mi (2,014.96 km) |
| Karkkila to Svilengrad | 1,299.35 mi (2,091.10 km) |
| Karkkila to Svishtov | 1,169.77 mi (1,882.56 km) |
| Karkkila to Targovishte | 1,198.23 mi (1,928.36 km) |
| Karkkila to Teteven | 1,217.19 mi (1,958.88 km) |
| Karkkila to Troyan | 1,219.68 mi (1,962.88 km) |
| Karkkila to Tryavna | 1,221.81 mi (1,966.31 km) |
| Karkkila to Tutrakan | 1,143.20 mi (1,839.81 km) |
| Karkkila to Varna | 1,206.36 mi (1,941.45 km) |
