| Borehamwood to Karlovo | 1,323.56 mi (2,130.07 km) |
| Borehamwood to Karnobat | 1,413.29 mi (2,274.46 km) |
| Borehamwood to Kavarna | 1,438.24 mi (2,314.63 km) |
| Borehamwood to Kazanlak | 1,348.86 mi (2,170.79 km) |
| Borehamwood to Knezha | 1,259.25 mi (2,026.57 km) |
| Borehamwood to Kostinbrod | 1,251.92 mi (2,014.77 km) |
| Borehamwood to Kozloduy | 1,233.71 mi (1,985.46 km) |
| Borehamwood to Kyustendil | 1,253.35 mi (2,017.07 km) |
| Borehamwood to Levski | 1,307.70 mi (2,104.54 km) |
| Borehamwood to Lom | 1,211.72 mi (1,950.07 km) |
| Borehamwood to Lovech | 1,299.85 mi (2,091.91 km) |
| Borehamwood to Lukovit | 1,274.69 mi (2,051.42 km) |
| Borehamwood to Lyaskovets | 1,342.32 mi (2,160.26 km) |
| Borehamwood to Mezdra | 1,257.70 mi (2,024.07 km) |
| Borehamwood to Momchilgrad | 1,395.27 mi (2,245.48 km) |
