| Os to Karlovo | 1,460.82 mi (2,350.96 km) |
| Os to Karnobat | 1,513.67 mi (2,436.02 km) |
| Os to Kavarna | 1,500.36 mi (2,414.60 km) |
| Os to Kazanlak | 1,476.33 mi (2,375.93 km) |
| Os to Knezha | 1,391.49 mi (2,239.38 km) |
| Os to Kostinbrod | 1,414.23 mi (2,275.99 km) |
| Os to Kozloduy | 1,366.05 mi (2,198.45 km) |
| Os to Kyustendil | 1,436.13 mi (2,311.22 km) |
| Os to Levski | 1,424.25 mi (2,292.11 km) |
| Os to Lom | 1,352.18 mi (2,176.12 km) |
| Os to Lovech | 1,428.59 mi (2,299.09 km) |
| Os to Lukovit | 1,411.83 mi (2,272.12 km) |
| Os to Lyaskovets | 1,454.44 mi (2,340.70 km) |
| Os to Mezdra | 1,404.30 mi (2,260.00 km) |
| Os to Momchilgrad | 1,543.39 mi (2,483.84 km) |
