| Cities | Distance |
|---|---|
| Birkenfeld to Popovo | 922.35 mi (1,484.37 km) |
| Birkenfeld to Provadia | 980.27 mi (1,577.60 km) |
| Birkenfeld to Radnevo | 948.55 mi (1,526.54 km) |
| Birkenfeld to Radomir | 815.06 mi (1,311.71 km) |
| Birkenfeld to Rakitovo | 884.86 mi (1,424.05 km) |
| Birkenfeld to Rakovski | 908.52 mi (1,462.11 km) |
| Birkenfeld to Razgrad | 928.30 mi (1,493.95 km) |
| Birkenfeld to Razlog | 864.31 mi (1,390.97 km) |
| Birkenfeld to Ruse | 893.97 mi (1,438.71 km) |
| Birkenfeld to Samokov | 848.53 mi (1,365.58 km) |
| Birkenfeld to Sandanski | 870.89 mi (1,401.56 km) |
| Birkenfeld to Sevlievo | 886.08 mi (1,426.01 km) |
| Birkenfeld to Shumen | 955.04 mi (1,536.99 km) |
| Birkenfeld to Silistra | 941.83 mi (1,515.74 km) |
| Birkenfeld to Sliven | 950.84 mi (1,530.22 km) |