| Allentown to Devnya | 4,925.95 mi (7,927.54 km) |
| Allentown to Dimitrovgrad | 4,897.43 mi (7,881.65 km) |
| Allentown to Dobrich | 4,921.28 mi (7,920.04 km) |
| Allentown to Dospat | 4,855.88 mi (7,814.79 km) |
| Allentown to Dupnitsa | 4,787.30 mi (7,704.41 km) |
| Allentown to Elhovo | 4,931.40 mi (7,936.33 km) |
| Allentown to Etropole | 4,799.75 mi (7,724.46 km) |
| Allentown to Gabrovo | 4,852.13 mi (7,808.75 km) |
| Allentown to Gorna Oryahovitsa | 4,855.56 mi (7,814.27 km) |
| Allentown to Gotse Delchev | 4,841.54 mi (7,791.70 km) |
| Allentown to Harmanli | 4,914.53 mi (7,909.18 km) |
| Allentown to Haskovo | 4,901.04 mi (7,887.46 km) |
| Allentown to Ihtiman | 4,808.72 mi (7,738.88 km) |
| Allentown to Isperih | 4,875.67 mi (7,846.63 km) |
| Allentown to Kardzhali | 4,904.95 mi (7,893.75 km) |
