| Fort Collins to Devnya | 5,940.71 mi (9,560.64 km) |
| Fort Collins to Dimitrovgrad | 5,950.09 mi (9,575.75 km) |
| Fort Collins to Dobrich | 5,928.15 mi (9,540.43 km) |
| Fort Collins to Dospat | 5,929.45 mi (9,542.53 km) |
| Fort Collins to Dupnitsa | 5,863.25 mi (9,436.00 km) |
| Fort Collins to Elhovo | 5,971.90 mi (9,610.84 km) |
| Fort Collins to Etropole | 5,858.47 mi (9,428.30 km) |
| Fort Collins to Gabrovo | 5,896.22 mi (9,489.04 km) |
| Fort Collins to Gorna Oryahovitsa | 5,891.93 mi (9,482.14 km) |
| Fort Collins to Gotse Delchev | 5,920.83 mi (9,528.66 km) |
| Fort Collins to Harmanli | 5,965.56 mi (9,600.64 km) |
| Fort Collins to Haskovo | 5,955.68 mi (9,584.75 km) |
| Fort Collins to Ihtiman | 5,874.96 mi (9,454.84 km) |
| Fort Collins to Isperih | 5,891.44 mi (9,481.35 km) |
| Fort Collins to Kardzhali | 5,965.68 mi (9,600.84 km) |
