| Glen Carbon to Karlovo | 5,487.45 mi (8,831.20 km) |
| Glen Carbon to Karnobat | 5,566.75 mi (8,958.81 km) |
| Glen Carbon to Kavarna | 5,575.02 mi (8,972.12 km) |
| Glen Carbon to Kazanlak | 5,510.38 mi (8,868.10 km) |
| Glen Carbon to Knezha | 5,420.17 mi (8,722.92 km) |
| Glen Carbon to Kostinbrod | 5,420.63 mi (8,723.66 km) |
| Glen Carbon to Kozloduy | 5,394.01 mi (8,680.82 km) |
| Glen Carbon to Kyustendil | 5,425.80 mi (8,731.99 km) |
| Glen Carbon to Levski | 5,464.62 mi (8,794.45 km) |
| Glen Carbon to Lom | 5,373.93 mi (8,648.51 km) |
| Glen Carbon to Lovech | 5,460.65 mi (8,788.07 km) |
| Glen Carbon to Lukovit | 5,437.46 mi (8,750.75 km) |
| Glen Carbon to Lyaskovets | 5,498.51 mi (8,849.00 km) |
| Glen Carbon to Mezdra | 5,422.73 mi (8,727.04 km) |
| Glen Carbon to Momchilgrad | 5,563.32 mi (8,953.30 km) |
