| Sliven to Knurow | 634.52 mi (1,021.17 km) |
| Sliven to Kobylka | 708.03 mi (1,139.47 km) |
| Sliven to Kokoszki | 881.34 mi (1,418.38 km) |
| Sliven to Kolbuszowa | 565.90 mi (910.74 km) |
| Sliven to Kolno | 768.16 mi (1,236.23 km) |
| Sliven to Kolo | 748.58 mi (1,204.72 km) |
| Sliven to Kolobrzeg | 932.44 mi (1,500.62 km) |
| Sliven to Koluszki | 696.78 mi (1,121.36 km) |
| Sliven to Komorniki | 799.01 mi (1,285.89 km) |
| Sliven to Konin | 757.83 mi (1,219.61 km) |
| Sliven to Konskie | 650.76 mi (1,047.30 km) |
| Sliven to Konstancin-Jeziorna | 693.36 mi (1,115.86 km) |
| Sliven to Konstantynow Lodzki | 706.59 mi (1,137.15 km) |
| Sliven to Koronowo | 829.70 mi (1,335.28 km) |
| Sliven to Koscian | 790.37 mi (1,271.97 km) |
