| Oklahoma City to Karlovo | 5,930.07 mi (9,543.53 km) |
| Oklahoma City to Karnobat | 6,005.94 mi (9,665.62 km) |
| Oklahoma City to Kavarna | 6,010.19 mi (9,672.47 km) |
| Oklahoma City to Kazanlak | 5,952.14 mi (9,579.05 km) |
| Oklahoma City to Knezha | 5,862.10 mi (9,434.14 km) |
| Oklahoma City to Kostinbrod | 5,865.27 mi (9,439.23 km) |
| Oklahoma City to Kozloduy | 5,835.87 mi (9,391.92 km) |
| Oklahoma City to Kyustendil | 5,872.28 mi (9,450.52 km) |
| Oklahoma City to Levski | 5,905.21 mi (9,503.52 km) |
| Oklahoma City to Lom | 5,816.44 mi (9,360.65 km) |
| Oklahoma City to Lovech | 5,902.38 mi (9,498.97 km) |
| Oklahoma City to Lukovit | 5,879.90 mi (9,462.78 km) |
| Oklahoma City to Lyaskovets | 5,938.76 mi (9,557.51 km) |
| Oklahoma City to Mezdra | 5,865.97 mi (9,440.37 km) |
| Oklahoma City to Momchilgrad | 6,007.27 mi (9,667.77 km) |
