| Bilthoven to Karlovo | 1,121.47 mi (1,804.82 km) |
| Bilthoven to Karnobat | 1,204.80 mi (1,938.93 km) |
| Bilthoven to Kavarna | 1,223.00 mi (1,968.23 km) |
| Bilthoven to Kazanlak | 1,145.02 mi (1,842.73 km) |
| Bilthoven to Knezha | 1,054.80 mi (1,697.53 km) |
| Bilthoven to Kostinbrod | 1,054.40 mi (1,696.89 km) |
| Bilthoven to Kozloduy | 1,028.76 mi (1,655.63 km) |
| Bilthoven to Kyustendil | 1,061.14 mi (1,707.73 km) |
| Bilthoven to Levski | 1,100.77 mi (1,771.51 km) |
| Bilthoven to Lom | 1,008.13 mi (1,622.44 km) |
| Bilthoven to Lovech | 1,095.40 mi (1,762.88 km) |
| Bilthoven to Lukovit | 1,071.64 mi (1,724.64 km) |
| Bilthoven to Lyaskovets | 1,135.08 mi (1,826.73 km) |
| Bilthoven to Mezdra | 1,056.50 mi (1,700.27 km) |
| Bilthoven to Momchilgrad | 1,196.97 mi (1,926.34 km) |
