| Harker Heights to Karlovo | 6,173.43 mi (9,935.17 km) |
| Harker Heights to Karnobat | 6,252.90 mi (10,063.07 km) |
| Harker Heights to Kavarna | 6,261.05 mi (10,076.18 km) |
| Harker Heights to Kazanlak | 6,196.43 mi (9,972.19 km) |
| Harker Heights to Knezha | 6,106.21 mi (9,826.99 km) |
| Harker Heights to Kostinbrod | 6,106.37 mi (9,827.26 km) |
| Harker Heights to Kozloduy | 6,080.06 mi (9,784.91 km) |
| Harker Heights to Kyustendil | 6,111.23 mi (9,835.07 km) |
| Harker Heights to Levski | 6,150.73 mi (9,898.65 km) |
| Harker Heights to Lom | 6,059.93 mi (9,752.52 km) |
| Harker Heights to Lovech | 6,146.70 mi (9,892.16 km) |
| Harker Heights to Lukovit | 6,123.46 mi (9,854.76 km) |
| Harker Heights to Lyaskovets | 6,184.64 mi (9,953.22 km) |
| Harker Heights to Mezdra | 6,108.65 mi (9,830.93 km) |
| Harker Heights to Momchilgrad | 6,249.15 mi (10,057.03 km) |
