| Birchington to Karlovo | 1,253.12 mi (2,016.70 km) |
| Birchington to Karnobat | 1,342.75 mi (2,160.95 km) |
| Birchington to Kavarna | 1,367.84 mi (2,201.32 km) |
| Birchington to Kazanlak | 1,278.38 mi (2,057.35 km) |
| Birchington to Knezha | 1,188.75 mi (1,913.11 km) |
| Birchington to Kostinbrod | 1,181.62 mi (1,901.64 km) |
| Birchington to Kozloduy | 1,163.19 mi (1,871.98 km) |
| Birchington to Kyustendil | 1,183.33 mi (1,904.38 km) |
| Birchington to Levski | 1,237.17 mi (1,991.03 km) |
| Birchington to Lom | 1,141.22 mi (1,836.62 km) |
| Birchington to Lovech | 1,229.35 mi (1,978.44 km) |
| Birchington to Lukovit | 1,204.22 mi (1,938.00 km) |
| Birchington to Lyaskovets | 1,271.79 mi (2,046.75 km) |
| Birchington to Mezdra | 1,187.27 mi (1,910.73 km) |
| Birchington to Momchilgrad | 1,324.98 mi (2,132.35 km) |
