| Glen Carbon to Devnya | 5,558.82 mi (8,946.05 km) |
| Glen Carbon to Dimitrovgrad | 5,545.07 mi (8,923.92 km) |
| Glen Carbon to Dobrich | 5,550.93 mi (8,933.36 km) |
| Glen Carbon to Dospat | 5,511.30 mi (8,869.58 km) |
| Glen Carbon to Dupnitsa | 5,442.97 mi (8,759.61 km) |
| Glen Carbon to Elhovo | 5,574.59 mi (8,971.43 km) |
| Glen Carbon to Etropole | 5,448.77 mi (8,768.95 km) |
| Glen Carbon to Gabrovo | 5,495.91 mi (8,844.80 km) |
| Glen Carbon to Gorna Oryahovitsa | 5,496.30 mi (8,845.44 km) |
| Glen Carbon to Gotse Delchev | 5,499.04 mi (8,849.86 km) |
| Glen Carbon to Harmanli | 5,561.70 mi (8,950.69 km) |
| Glen Carbon to Haskovo | 5,549.49 mi (8,931.05 km) |
| Glen Carbon to Ihtiman | 5,460.79 mi (8,788.30 km) |
| Glen Carbon to Isperih | 5,508.39 mi (8,864.90 km) |
| Glen Carbon to Kardzhali | 5,555.84 mi (8,941.25 km) |
