| Blackwells Mills to Popovo | 4,838.01 mi (7,786.03 km) |
| Blackwells Mills to Provadia | 4,892.83 mi (7,874.25 km) |
| Blackwells Mills to Radnevo | 4,870.02 mi (7,837.54 km) |
| Blackwells Mills to Radomir | 4,737.70 mi (7,624.60 km) |
| Blackwells Mills to Rakitovo | 4,807.58 mi (7,737.06 km) |
| Blackwells Mills to Rakovski | 4,831.13 mi (7,774.96 km) |
| Blackwells Mills to Razgrad | 4,841.61 mi (7,791.83 km) |
| Blackwells Mills to Razlog | 4,786.22 mi (7,702.68 km) |
| Blackwells Mills to Ruse | 4,807.11 mi (7,736.29 km) |
| Blackwells Mills to Samokov | 4,771.31 mi (7,678.69 km) |
| Blackwells Mills to Sandanski | 4,791.48 mi (7,711.13 km) |
| Blackwells Mills to Sevlievo | 4,806.53 mi (7,735.37 km) |
| Blackwells Mills to Shumen | 4,868.72 mi (7,835.45 km) |
| Blackwells Mills to Silistra | 4,846.42 mi (7,799.55 km) |
| Blackwells Mills to Sliven | 4,870.04 mi (7,837.58 km) |
