| Boiro to Karlovo | 1,701.51 mi (2,738.31 km) |
| Boiro to Karnobat | 1,809.84 mi (2,912.66 km) |
| Boiro to Kavarna | 1,865.19 mi (3,001.74 km) |
| Boiro to Kazanlak | 1,731.39 mi (2,786.41 km) |
| Boiro to Knezha | 1,654.76 mi (2,663.08 km) |
| Boiro to Kostinbrod | 1,620.00 mi (2,607.13 km) |
| Boiro to Kozloduy | 1,634.39 mi (2,630.30 km) |
| Boiro to Kyustendil | 1,600.50 mi (2,575.76 km) |
| Boiro to Levski | 1,708.24 mi (2,749.15 km) |
| Boiro to Lom | 1,609.51 mi (2,590.25 km) |
| Boiro to Lovech | 1,690.52 mi (2,720.63 km) |
| Boiro to Lukovit | 1,662.42 mi (2,675.41 km) |
| Boiro to Lyaskovets | 1,740.50 mi (2,801.06 km) |
| Boiro to Mezdra | 1,639.88 mi (2,639.13 km) |
| Boiro to Momchilgrad | 1,749.07 mi (2,814.86 km) |
