| Desborough to Karlovo | 1,362.93 mi (2,193.43 km) |
| Desborough to Karnobat | 1,450.48 mi (2,334.33 km) |
| Desborough to Kavarna | 1,472.65 mi (2,370.00 km) |
| Desborough to Kazanlak | 1,387.67 mi (2,233.25 km) |
| Desborough to Knezha | 1,297.75 mi (2,088.53 km) |
| Desborough to Kostinbrod | 1,292.64 mi (2,080.30 km) |
| Desborough to Kozloduy | 1,272.01 mi (2,047.10 km) |
| Desborough to Kyustendil | 1,295.59 mi (2,085.05 km) |
| Desborough to Levski | 1,345.38 mi (2,165.17 km) |
| Desborough to Lom | 1,250.45 mi (2,012.41 km) |
| Desborough to Lovech | 1,338.40 mi (2,153.95 km) |
| Desborough to Lukovit | 1,313.69 mi (2,114.18 km) |
| Desborough to Lyaskovets | 1,379.92 mi (2,220.77 km) |
| Desborough to Mezdra | 1,297.28 mi (2,087.77 km) |
| Desborough to Momchilgrad | 1,435.93 mi (2,310.90 km) |
