| Hildburghausen to Popovo | 876.53 mi (1,410.64 km) |
| Hildburghausen to Provadia | 930.83 mi (1,498.03 km) |
| Hildburghausen to Radnevo | 912.86 mi (1,469.11 km) |
| Hildburghausen to Radomir | 793.32 mi (1,276.72 km) |
| Hildburghausen to Rakitovo | 861.40 mi (1,386.29 km) |
| Hildburghausen to Rakovski | 877.75 mi (1,412.60 km) |
| Hildburghausen to Razgrad | 879.70 mi (1,415.73 km) |
| Hildburghausen to Razlog | 845.24 mi (1,360.29 km) |
| Hildburghausen to Ruse | 845.21 mi (1,360.23 km) |
| Hildburghausen to Samokov | 825.09 mi (1,327.85 km) |
| Hildburghausen to Sandanski | 855.52 mi (1,376.82 km) |
| Hildburghausen to Sevlievo | 848.27 mi (1,365.15 km) |
| Hildburghausen to Shumen | 906.81 mi (1,459.37 km) |
| Hildburghausen to Silistra | 885.28 mi (1,424.72 km) |
| Hildburghausen to Sliven | 910.16 mi (1,464.77 km) |
