| Hardenberg to Devnya | 1,159.24 mi (1,865.62 km) |
| Hardenberg to Dimitrovgrad | 1,142.35 mi (1,838.43 km) |
| Hardenberg to Dobrich | 1,153.67 mi (1,856.65 km) |
| Hardenberg to Dospat | 1,112.63 mi (1,790.61 km) |
| Hardenberg to Dupnitsa | 1,045.14 mi (1,682.00 km) |
| Hardenberg to Elhovo | 1,171.45 mi (1,885.27 km) |
| Hardenberg to Etropole | 1,046.74 mi (1,684.56 km) |
| Hardenberg to Gabrovo | 1,092.75 mi (1,758.61 km) |
| Hardenberg to Gorna Oryahovitsa | 1,093.39 mi (1,759.65 km) |
| Hardenberg to Gotse Delchev | 1,102.29 mi (1,773.97 km) |
| Hardenberg to Harmanli | 1,158.85 mi (1,864.99 km) |
| Hardenberg to Haskovo | 1,146.98 mi (1,845.88 km) |
| Hardenberg to Ihtiman | 1,060.20 mi (1,706.23 km) |
| Hardenberg to Isperih | 1,108.83 mi (1,784.49 km) |
| Hardenberg to Kardzhali | 1,154.17 mi (1,857.46 km) |
