| Allentown to Karlovo | 4,840.32 mi (7,789.75 km) |
| Allentown to Karnobat | 4,928.00 mi (7,930.85 km) |
| Allentown to Kavarna | 4,946.58 mi (7,960.76 km) |
| Allentown to Kazanlak | 4,865.36 mi (7,830.03 km) |
| Allentown to Knezha | 4,775.51 mi (7,685.44 km) |
| Allentown to Kostinbrod | 4,768.61 mi (7,674.34 km) |
| Allentown to Kozloduy | 4,749.79 mi (7,644.05 km) |
| Allentown to Kyustendil | 4,768.66 mi (7,674.42 km) |
| Allentown to Levski | 4,823.12 mi (7,762.06 km) |
| Allentown to Lom | 4,728.14 mi (7,609.21 km) |
| Allentown to Lovech | 4,816.15 mi (7,750.84 km) |
| Allentown to Lukovit | 4,791.28 mi (7,710.83 km) |
| Allentown to Lyaskovets | 4,857.63 mi (7,817.60 km) |
| Allentown to Mezdra | 4,774.51 mi (7,683.83 km) |
| Allentown to Momchilgrad | 4,911.95 mi (7,905.01 km) |
