| Red Bluff to Karlovo | 6,355.48 mi (10,228.15 km) |
| Red Bluff to Karnobat | 6,400.78 mi (10,301.06 km) |
| Red Bluff to Kavarna | 6,375.88 mi (10,260.99 km) |
| Red Bluff to Kazanlak | 6,369.60 mi (10,250.89 km) |
| Red Bluff to Knezha | 6,286.44 mi (10,117.04 km) |
| Red Bluff to Kostinbrod | 6,310.37 mi (10,155.56 km) |
| Red Bluff to Kozloduy | 6,261.27 mi (10,076.55 km) |
| Red Bluff to Kyustendil | 6,331.69 mi (10,189.87 km) |
| Red Bluff to Levski | 6,316.82 mi (10,165.94 km) |
| Red Bluff to Lom | 6,248.00 mi (10,055.18 km) |
| Red Bluff to Lovech | 6,322.73 mi (10,175.45 km) |
| Red Bluff to Lukovit | 6,306.99 mi (10,150.12 km) |
| Red Bluff to Lyaskovets | 6,345.64 mi (10,212.33 km) |
| Red Bluff to Mezdra | 6,300.11 mi (10,139.05 km) |
| Red Bluff to Momchilgrad | 6,438.25 mi (10,361.36 km) |
