| Norristown to Karlovo | 4,855.72 mi (7,814.52 km) |
| Norristown to Karnobat | 4,943.93 mi (7,956.48 km) |
| Norristown to Kavarna | 4,963.17 mi (7,987.46 km) |
| Norristown to Kazanlak | 4,880.88 mi (7,855.02 km) |
| Norristown to Knezha | 4,791.11 mi (7,710.54 km) |
| Norristown to Kostinbrod | 4,783.69 mi (7,698.61 km) |
| Norristown to Kozloduy | 4,765.43 mi (7,669.22 km) |
| Norristown to Kyustendil | 4,783.37 mi (7,698.09 km) |
| Norristown to Levski | 4,838.91 mi (7,787.47 km) |
| Norristown to Lom | 4,743.68 mi (7,634.22 km) |
| Norristown to Lovech | 4,831.74 mi (7,775.93 km) |
| Norristown to Lukovit | 4,806.77 mi (7,735.74 km) |
| Norristown to Lyaskovets | 4,873.45 mi (7,843.05 km) |
| Norristown to Mezdra | 4,789.86 mi (7,708.53 km) |
| Norristown to Momchilgrad | 4,927.00 mi (7,929.25 km) |
