| Herndon to Devnya | 5,076.56 mi (8,169.93 km) |
| Herndon to Dimitrovgrad | 5,047.45 mi (8,123.08 km) |
| Herndon to Dobrich | 5,072.00 mi (8,162.60 km) |
| Herndon to Dospat | 5,005.51 mi (8,055.60 km) |
| Herndon to Dupnitsa | 4,936.94 mi (7,945.24 km) |
| Herndon to Elhovo | 5,081.61 mi (8,178.07 km) |
| Herndon to Etropole | 4,949.74 mi (7,965.83 km) |
| Herndon to Gabrovo | 5,002.34 mi (8,050.49 km) |
| Herndon to Gorna Oryahovitsa | 5,005.89 mi (8,056.21 km) |
| Herndon to Gotse Delchev | 4,991.06 mi (8,032.33 km) |
| Herndon to Harmanli | 5,064.57 mi (8,150.63 km) |
| Herndon to Haskovo | 5,051.02 mi (8,128.83 km) |
| Herndon to Ihtiman | 4,958.54 mi (7,980.01 km) |
| Herndon to Isperih | 5,026.29 mi (8,089.04 km) |
| Herndon to Kardzhali | 5,054.81 mi (8,134.92 km) |
