| Diamond Bar to Karlovo | 6,638.02 mi (10,682.86 km) |
| Diamond Bar to Karnobat | 6,693.25 mi (10,771.75 km) |
| Diamond Bar to Kavarna | 6,676.82 mi (10,745.30 km) |
| Diamond Bar to Kazanlak | 6,654.77 mi (10,709.83 km) |
| Diamond Bar to Knezha | 6,568.49 mi (10,570.96 km) |
| Diamond Bar to Kostinbrod | 6,586.20 mi (10,599.47 km) |
| Diamond Bar to Kozloduy | 6,542.69 mi (10,529.45 km) |
| Diamond Bar to Kyustendil | 6,603.23 mi (10,626.87 km) |
| Diamond Bar to Levski | 6,603.17 mi (10,626.77 km) |
| Diamond Bar to Lom | 6,527.34 mi (10,504.74 km) |
| Diamond Bar to Lovech | 6,606.45 mi (10,632.06 km) |
| Diamond Bar to Lukovit | 6,588.43 mi (10,603.05 km) |
| Diamond Bar to Lyaskovets | 6,633.79 mi (10,676.05 km) |
| Diamond Bar to Mezdra | 6,579.27 mi (10,588.30 km) |
| Diamond Bar to Momchilgrad | 6,720.04 mi (10,814.85 km) |
