| Cities | Distance |
|---|
| Regen to Popovo | 735.82 mi (1,184.19 km) |
| Regen to Provadia | 791.53 mi (1,273.84 km) |
| Regen to Radnevo | 769.42 mi (1,238.26 km) |
| Regen to Radomir | 647.49 mi (1,042.03 km) |
| Regen to Rakitovo | 715.82 mi (1,152.00 km) |
| Regen to Rakovski | 733.24 mi (1,180.04 km) |
| Regen to Razgrad | 739.96 mi (1,190.85 km) |
| Regen to Razlog | 699.26 mi (1,125.35 km) |
| Regen to Ruse | 705.44 mi (1,135.29 km) |
| Regen to Samokov | 679.46 mi (1,093.48 km) |
| Regen to Sandanski | 709.36 mi (1,141.60 km) |
| Regen to Sevlievo | 705.19 mi (1,134.89 km) |
| Regen to Shumen | 767.01 mi (1,234.38 km) |
| Regen to Silistra | 748.77 mi (1,205.03 km) |
| Regen to Sliven | 767.98 mi (1,235.94 km) |
