| Birkenhead to Karlovo | 1,471.06 mi (2,367.44 km) |
| Birkenhead to Karnobat | 1,556.95 mi (2,505.67 km) |
| Birkenhead to Kavarna | 1,576.80 mi (2,537.61 km) |
| Birkenhead to Kazanlak | 1,495.39 mi (2,406.60 km) |
| Birkenhead to Knezha | 1,405.31 mi (2,261.63 km) |
| Birkenhead to Kostinbrod | 1,401.71 mi (2,255.83 km) |
| Birkenhead to Kozloduy | 1,379.44 mi (2,220.00 km) |
| Birkenhead to Kyustendil | 1,405.58 mi (2,262.07 km) |
| Birkenhead to Levski | 1,452.29 mi (2,337.23 km) |
| Birkenhead to Lom | 1,358.22 mi (2,185.85 km) |
| Birkenhead to Lovech | 1,445.96 mi (2,327.05 km) |
| Birkenhead to Lukovit | 1,421.59 mi (2,287.83 km) |
| Birkenhead to Lyaskovets | 1,486.75 mi (2,392.69 km) |
| Birkenhead to Mezdra | 1,405.60 mi (2,262.10 km) |
| Birkenhead to Momchilgrad | 1,544.88 mi (2,486.24 km) |
