| Hardenberg to Popovo | 1,102.99 mi (1,775.09 km) |
| Hardenberg to Provadia | 1,155.72 mi (1,859.94 km) |
| Hardenberg to Radnevo | 1,141.99 mi (1,837.85 km) |
| Hardenberg to Radomir | 1,024.72 mi (1,649.12 km) |
| Hardenberg to Rakitovo | 1,092.58 mi (1,758.34 km) |
| Hardenberg to Rakovski | 1,107.94 mi (1,783.06 km) |
| Hardenberg to Razgrad | 1,105.17 mi (1,778.60 km) |
| Hardenberg to Razlog | 1,076.75 mi (1,732.86 km) |
| Hardenberg to Ruse | 1,070.83 mi (1,723.33 km) |
| Hardenberg to Samokov | 1,056.31 mi (1,699.97 km) |
| Hardenberg to Sandanski | 1,087.14 mi (1,749.58 km) |
| Hardenberg to Sevlievo | 1,077.12 mi (1,733.46 km) |
| Hardenberg to Shumen | 1,132.28 mi (1,822.23 km) |
| Hardenberg to Silistra | 1,107.44 mi (1,782.26 km) |
| Hardenberg to Sliven | 1,138.04 mi (1,831.50 km) |
