| Challans to Popovo | 1,384.47 mi (2,228.09 km) |
| Challans to Provadia | 1,445.13 mi (2,325.72 km) |
| Challans to Radnevo | 1,396.54 mi (2,247.51 km) |
| Challans to Radomir | 1,249.28 mi (2,010.52 km) |
| Challans to Rakitovo | 1,317.91 mi (2,120.96 km) |
| Challans to Rakovski | 1,351.18 mi (2,174.52 km) |
| Challans to Razgrad | 1,393.61 mi (2,242.80 km) |
| Challans to Razlog | 1,291.70 mi (2,078.79 km) |
| Challans to Ruse | 1,360.50 mi (2,189.52 km) |
| Challans to Samokov | 1,283.43 mi (2,065.47 km) |
| Challans to Sandanski | 1,292.07 mi (2,079.38 km) |
| Challans to Sevlievo | 1,339.32 mi (2,155.43 km) |
| Challans to Shumen | 1,419.12 mi (2,283.86 km) |
| Challans to Silistra | 1,415.83 mi (2,278.56 km) |
| Challans to Sliven | 1,405.49 mi (2,261.91 km) |
