| Red Oak to Karlovo | 6,062.94 mi (9,757.36 km) |
| Red Oak to Karnobat | 6,141.97 mi (9,884.54 km) |
| Red Oak to Kavarna | 6,149.67 mi (9,896.94 km) |
| Red Oak to Kazanlak | 6,085.83 mi (9,794.19 km) |
| Red Oak to Knezha | 5,995.62 mi (9,649.01 km) |
| Red Oak to Kostinbrod | 5,996.17 mi (9,649.91 km) |
| Red Oak to Kozloduy | 5,969.45 mi (9,606.90 km) |
| Red Oak to Kyustendil | 6,001.32 mi (9,658.20 km) |
| Red Oak to Levski | 6,039.97 mi (9,720.39 km) |
| Red Oak to Lom | 5,949.41 mi (9,574.65 km) |
| Red Oak to Lovech | 6,036.09 mi (9,714.15 km) |
| Red Oak to Lukovit | 6,012.94 mi (9,676.89 km) |
| Red Oak to Lyaskovets | 6,073.84 mi (9,774.90 km) |
| Red Oak to Mezdra | 5,998.25 mi (9,653.24 km) |
| Red Oak to Momchilgrad | 6,138.86 mi (9,879.54 km) |
