| Radford to Devnya | 5,289.49 mi (8,512.62 km) |
| Radford to Dimitrovgrad | 5,261.15 mi (8,467.00 km) |
| Radford to Dobrich | 5,284.74 mi (8,504.97 km) |
| Radford to Dospat | 5,219.53 mi (8,400.03 km) |
| Radford to Dupnitsa | 5,150.95 mi (8,289.66 km) |
| Radford to Elhovo | 5,295.11 mi (8,521.66 km) |
| Radford to Etropole | 5,163.47 mi (8,309.81 km) |
| Radford to Gabrovo | 5,215.84 mi (8,394.08 km) |
| Radford to Gorna Oryahovitsa | 5,219.24 mi (8,399.56 km) |
| Radford to Gotse Delchev | 5,205.15 mi (8,376.88 km) |
| Radford to Harmanli | 5,278.25 mi (8,494.53 km) |
| Radford to Haskovo | 5,264.76 mi (8,472.81 km) |
| Radford to Ihtiman | 5,172.42 mi (8,324.20 km) |
| Radford to Isperih | 5,239.20 mi (8,431.68 km) |
| Radford to Kardzhali | 5,268.65 mi (8,479.08 km) |
