| Calhoun to Devnya | 5,590.89 mi (8,997.67 km) |
| Calhoun to Dimitrovgrad | 5,563.98 mi (8,954.36 km) |
| Calhoun to Dobrich | 5,585.79 mi (8,989.45 km) |
| Calhoun to Dospat | 5,523.00 mi (8,888.41 km) |
| Calhoun to Dupnitsa | 5,454.41 mi (8,778.02 km) |
| Calhoun to Elhovo | 5,597.55 mi (9,008.39 km) |
| Calhoun to Etropole | 5,466.37 mi (8,797.28 km) |
| Calhoun to Gabrovo | 5,518.29 mi (8,880.83 km) |
| Calhoun to Gorna Oryahovitsa | 5,521.40 mi (8,885.84 km) |
| Calhoun to Gotse Delchev | 5,508.77 mi (8,865.52 km) |
| Calhoun to Harmanli | 5,581.05 mi (8,981.83 km) |
| Calhoun to Haskovo | 5,567.66 mi (8,960.29 km) |
| Calhoun to Ihtiman | 5,475.59 mi (8,812.11 km) |
| Calhoun to Isperih | 5,540.55 mi (8,916.65 km) |
| Calhoun to Kardzhali | 5,571.77 mi (8,966.90 km) |
