| Sliven to Koscielisko | 550.77 mi (886.38 km) |
| Sliven to Koscierzyna | 876.52 mi (1,410.62 km) |
| Sliven to Kostrzyn | 792.84 mi (1,275.96 km) |
| Sliven to Kostrzyn nad Odra | 871.46 mi (1,402.49 km) |
| Sliven to Koszalin | 919.66 mi (1,480.06 km) |
| Sliven to Kowary | 747.59 mi (1,203.13 km) |
| Sliven to Kozienice | 654.12 mi (1,052.70 km) |
| Sliven to Kozuchow | 802.11 mi (1,290.87 km) |
| Sliven to Kozy | 602.73 mi (970.00 km) |
| Sliven to Krakow | 593.50 mi (955.15 km) |
| Sliven to Krapkowice | 667.76 mi (1,074.66 km) |
| Sliven to Krasnik | 601.02 mi (967.26 km) |
| Sliven to Krasnystaw | 592.34 mi (953.28 km) |
| Sliven to Krosno | 530.78 mi (854.20 km) |
| Sliven to Krosno Odrzanskie | 830.97 mi (1,337.32 km) |
