| Boadilla del Monte to Karlovo | 1,484.52 mi (2,389.10 km) |
| Boadilla del Monte to Karnobat | 1,594.85 mi (2,566.66 km) |
| Boadilla del Monte to Kavarna | 1,658.54 mi (2,669.16 km) |
| Boadilla del Monte to Kazanlak | 1,514.71 mi (2,437.68 km) |
| Boadilla del Monte to Knezha | 1,445.45 mi (2,326.22 km) |
| Boadilla del Monte to Kostinbrod | 1,403.26 mi (2,258.33 km) |
| Boadilla del Monte to Kozloduy | 1,427.72 mi (2,297.69 km) |
| Boadilla del Monte to Kyustendil | 1,378.08 mi (2,217.81 km) |
| Boadilla del Monte to Levski | 1,498.37 mi (2,411.40 km) |
| Boadilla del Monte to Lom | 1,403.00 mi (2,257.91 km) |
| Boadilla del Monte to Lovech | 1,478.10 mi (2,378.78 km) |
| Boadilla del Monte to Lukovit | 1,450.21 mi (2,333.88 km) |
| Boadilla del Monte to Lyaskovets | 1,528.57 mi (2,459.99 km) |
| Boadilla del Monte to Mezdra | 1,426.82 mi (2,296.24 km) |
| Boadilla del Monte to Momchilgrad | 1,522.78 mi (2,450.67 km) |
