| Dorridge to Popovo | 1,427.34 mi (2,297.07 km) |
| Dorridge to Provadia | 1,483.12 mi (2,386.86 km) |
| Dorridge to Radnevo | 1,458.70 mi (2,347.56 km) |
| Dorridge to Radomir | 1,329.02 mi (2,138.85 km) |
| Dorridge to Rakitovo | 1,398.64 mi (2,250.89 km) |
| Dorridge to Rakovski | 1,420.39 mi (2,285.89 km) |
| Dorridge to Razgrad | 1,431.58 mi (2,303.90 km) |
| Dorridge to Razlog | 1,378.82 mi (2,218.99 km) |
| Dorridge to Ruse | 1,397.06 mi (2,248.34 km) |
| Dorridge to Samokov | 1,362.23 mi (2,192.30 km) |
| Dorridge to Sandanski | 1,385.82 mi (2,230.26 km) |
| Dorridge to Sevlievo | 1,395.14 mi (2,245.25 km) |
| Dorridge to Shumen | 1,458.63 mi (2,347.43 km) |
| Dorridge to Silistra | 1,439.38 mi (2,316.46 km) |
| Dorridge to Sliven | 1,458.72 mi (2,347.59 km) |
