| Bad Salzdetfurth to Popovo | 961.48 mi (1,547.35 km) |
| Bad Salzdetfurth to Provadia | 1,012.99 mi (1,630.25 km) |
| Bad Salzdetfurth to Radnevo | 1,003.20 mi (1,614.50 km) |
| Bad Salzdetfurth to Radomir | 891.70 mi (1,435.05 km) |
| Bad Salzdetfurth to Rakitovo | 958.35 mi (1,542.31 km) |
| Bad Salzdetfurth to Rakovski | 971.00 mi (1,562.67 km) |
| Bad Salzdetfurth to Razgrad | 962.92 mi (1,549.67 km) |
| Bad Salzdetfurth to Razlog | 944.32 mi (1,519.73 km) |
| Bad Salzdetfurth to Ruse | 928.74 mi (1,494.66 km) |
| Bad Salzdetfurth to Samokov | 922.38 mi (1,484.42 km) |
| Bad Salzdetfurth to Sandanski | 956.09 mi (1,538.68 km) |
| Bad Salzdetfurth to Sevlievo | 938.10 mi (1,509.73 km) |
| Bad Salzdetfurth to Shumen | 989.98 mi (1,593.21 km) |
| Bad Salzdetfurth to Silistra | 963.32 mi (1,550.32 km) |
| Bad Salzdetfurth to Sliven | 997.77 mi (1,605.76 km) |
