| Security-Widefield to Karlovo | 5,984.92 mi (9,631.80 km) |
| Security-Widefield to Karnobat | 6,051.06 mi (9,738.24 km) |
| Security-Widefield to Kavarna | 6,045.22 mi (9,728.84 km) |
| Security-Widefield to Kazanlak | 6,004.49 mi (9,663.29 km) |
| Security-Widefield to Knezha | 5,915.71 mi (9,520.41 km) |
| Security-Widefield to Kostinbrod | 5,926.22 mi (9,537.33 km) |
| Security-Widefield to Kozloduy | 5,889.52 mi (9,478.27 km) |
| Security-Widefield to Kyustendil | 5,938.36 mi (9,556.86 km) |
| Security-Widefield to Levski | 5,954.91 mi (9,583.50 km) |
| Security-Widefield to Lom | 5,872.01 mi (9,450.09 km) |
| Security-Widefield to Lovech | 5,955.11 mi (9,583.82 km) |
| Security-Widefield to Lukovit | 5,934.70 mi (9,550.98 km) |
| Security-Widefield to Lyaskovets | 5,987.23 mi (9,635.52 km) |
| Security-Widefield to Mezdra | 5,923.07 mi (9,532.27 km) |
| Security-Widefield to Momchilgrad | 6,065.05 mi (9,760.75 km) |
