| Usingen to Karlovo | 935.61 mi (1,505.71 km) |
| Usingen to Karnobat | 1,022.11 mi (1,644.92 km) |
| Usingen to Kavarna | 1,044.97 mi (1,681.71 km) |
| Usingen to Kazanlak | 959.92 mi (1,544.85 km) |
| Usingen to Knezha | 869.87 mi (1,399.92 km) |
| Usingen to Kostinbrod | 866.85 mi (1,395.06 km) |
| Usingen to Kozloduy | 844.03 mi (1,358.33 km) |
| Usingen to Kyustendil | 872.26 mi (1,403.76 km) |
| Usingen to Levski | 917.12 mi (1,475.96 km) |
| Usingen to Lom | 822.75 mi (1,324.08 km) |
| Usingen to Lovech | 910.52 mi (1,465.34 km) |
| Usingen to Lukovit | 886.11 mi (1,426.06 km) |
| Usingen to Lyaskovets | 951.63 mi (1,531.50 km) |
| Usingen to Mezdra | 870.20 mi (1,400.46 km) |
| Usingen to Momchilgrad | 1,009.84 mi (1,625.18 km) |
