| Prestonpans to Karlovo | 1,535.70 mi (2,471.48 km) |
| Prestonpans to Karnobat | 1,613.36 mi (2,596.45 km) |
| Prestonpans to Kavarna | 1,623.74 mi (2,613.16 km) |
| Prestonpans to Kazanlak | 1,557.88 mi (2,507.17 km) |
| Prestonpans to Knezha | 1,467.78 mi (2,362.17 km) |
| Prestonpans to Kostinbrod | 1,471.71 mi (2,368.49 km) |
| Prestonpans to Kozloduy | 1,441.56 mi (2,319.97 km) |
| Prestonpans to Kyustendil | 1,480.79 mi (2,383.11 km) |
| Prestonpans to Levski | 1,511.46 mi (2,432.46 km) |
| Prestonpans to Lom | 1,422.07 mi (2,288.60 km) |
| Prestonpans to Lovech | 1,508.12 mi (2,427.09 km) |
| Prestonpans to Lukovit | 1,485.53 mi (2,390.73 km) |
| Prestonpans to Lyaskovets | 1,545.25 mi (2,486.84 km) |
| Prestonpans to Mezdra | 1,471.70 mi (2,368.47 km) |
| Prestonpans to Momchilgrad | 1,613.19 mi (2,596.17 km) |
