| Frondenberg to Popovo | 1,025.36 mi (1,650.15 km) |
| Frondenberg to Provadia | 1,079.40 mi (1,737.13 km) |
| Frondenberg to Radnevo | 1,061.77 mi (1,708.75 km) |
| Frondenberg to Radomir | 941.02 mi (1,514.43 km) |
| Frondenberg to Rakitovo | 1,009.42 mi (1,624.50 km) |
| Frondenberg to Rakovski | 1,026.42 mi (1,651.86 km) |
| Frondenberg to Razgrad | 1,028.37 mi (1,655.00 km) |
| Frondenberg to Razlog | 992.68 mi (1,597.56 km) |
| Frondenberg to Ruse | 993.90 mi (1,599.53 km) |
| Frondenberg to Samokov | 973.05 mi (1,565.97 km) |
| Frondenberg to Sandanski | 1,002.41 mi (1,613.22 km) |
| Frondenberg to Sevlievo | 997.20 mi (1,604.84 km) |
| Frondenberg to Shumen | 1,055.49 mi (1,698.65 km) |
| Frondenberg to Silistra | 1,033.18 mi (1,662.74 km) |
| Frondenberg to Sliven | 1,059.12 mi (1,704.48 km) |
