| Chicago Heights to Karlovo | 5,264.25 mi (8,472.00 km) |
| Chicago Heights to Karnobat | 5,342.77 mi (8,598.36 km) |
| Chicago Heights to Kavarna | 5,350.27 mi (8,610.42 km) |
| Chicago Heights to Kazanlak | 5,286.98 mi (8,508.57 km) |
| Chicago Heights to Knezha | 5,196.79 mi (8,363.42 km) |
| Chicago Heights to Kostinbrod | 5,197.95 mi (8,365.30 km) |
| Chicago Heights to Kozloduy | 5,170.61 mi (8,321.29 km) |
| Chicago Heights to Kyustendil | 5,203.66 mi (8,374.49 km) |
| Chicago Heights to Levski | 5,240.93 mi (8,434.46 km) |
| Chicago Heights to Lom | 5,150.69 mi (8,289.23 km) |
| Chicago Heights to Lovech | 5,237.23 mi (8,428.51 km) |
| Chicago Heights to Lukovit | 5,214.21 mi (8,391.46 km) |
| Chicago Heights to Lyaskovets | 5,274.76 mi (8,488.90 km) |
| Chicago Heights to Mezdra | 5,199.68 mi (8,368.08 km) |
| Chicago Heights to Momchilgrad | 5,340.49 mi (8,594.68 km) |
