| Radford to Popovo | 5,231.23 mi (8,418.85 km) |
| Radford to Provadia | 5,285.70 mi (8,506.51 km) |
| Radford to Radnevo | 5,263.97 mi (8,471.53 km) |
| Radford to Radomir | 5,132.34 mi (8,259.71 km) |
| Radford to Rakitovo | 5,202.20 mi (8,372.13 km) |
| Radford to Rakovski | 5,225.37 mi (8,409.42 km) |
| Radford to Razgrad | 5,234.60 mi (8,424.28 km) |
| Radford to Razlog | 5,181.02 mi (8,338.05 km) |
| Radford to Ruse | 5,200.11 mi (8,368.77 km) |
| Radford to Samokov | 5,165.90 mi (8,313.71 km) |
| Radford to Sandanski | 5,186.44 mi (8,346.77 km) |
| Radford to Sevlievo | 5,200.33 mi (8,369.12 km) |
| Radford to Shumen | 5,261.72 mi (8,467.92 km) |
| Radford to Silistra | 5,238.69 mi (8,430.86 km) |
| Radford to Sliven | 5,263.64 mi (8,471.01 km) |
