| Gustrow to Popovo | 962.80 mi (1,549.48 km) |
| Gustrow to Provadia | 1,008.58 mi (1,623.14 km) |
| Gustrow to Radnevo | 1,013.40 mi (1,630.92 km) |
| Gustrow to Radomir | 919.68 mi (1,480.09 km) |
| Gustrow to Rakitovo | 982.14 mi (1,580.61 km) |
| Gustrow to Rakovski | 987.25 mi (1,588.82 km) |
| Gustrow to Razgrad | 961.25 mi (1,546.98 km) |
| Gustrow to Razlog | 972.78 mi (1,565.54 km) |
| Gustrow to Ruse | 928.27 mi (1,493.90 km) |
| Gustrow to Samokov | 947.53 mi (1,524.91 km) |
| Gustrow to Sandanski | 987.57 mi (1,589.35 km) |
| Gustrow to Sevlievo | 948.57 mi (1,526.58 km) |
| Gustrow to Shumen | 987.69 mi (1,589.53 km) |
| Gustrow to Silistra | 953.05 mi (1,533.79 km) |
| Gustrow to Sliven | 1,003.09 mi (1,614.31 km) |
