| Keila to Smolyan | 1,224.76 mi (1,971.06 km) |
| Keila to Sofia | 1,148.49 mi (1,848.31 km) |
| Keila to Sopot | 1,151.08 mi (1,852.49 km) |
| Keila to Sozopol | 1,175.49 mi (1,891.76 km) |
| Keila to Sredets | 1,177.73 mi (1,895.37 km) |
| Keila to Stamboliyski | 1,186.71 mi (1,909.82 km) |
| Keila to Stara Zagora | 1,167.15 mi (1,878.34 km) |
| Keila to Svilengrad | 1,214.43 mi (1,954.44 km) |
| Keila to Svishtov | 1,084.91 mi (1,746.00 km) |
| Keila to Targovishte | 1,113.32 mi (1,791.71 km) |
| Keila to Teteven | 1,132.59 mi (1,822.73 km) |
| Keila to Troyan | 1,134.95 mi (1,826.52 km) |
| Keila to Tryavna | 1,136.94 mi (1,829.72 km) |
| Keila to Tutrakan | 1,058.31 mi (1,703.18 km) |
| Keila to Varna | 1,121.68 mi (1,805.16 km) |
