| Box Elder to Karlovo | 5,633.57 mi (9,066.35 km) |
| Box Elder to Karnobat | 5,696.50 mi (9,167.63 km) |
| Box Elder to Kavarna | 5,687.71 mi (9,153.49 km) |
| Box Elder to Kazanlak | 5,652.28 mi (9,096.47 km) |
| Box Elder to Knezha | 5,564.16 mi (8,954.64 km) |
| Box Elder to Kostinbrod | 5,577.03 mi (8,975.37 km) |
| Box Elder to Kozloduy | 5,538.06 mi (8,912.64 km) |
| Box Elder to Kyustendil | 5,590.87 mi (8,997.64 km) |
| Box Elder to Levski | 5,602.01 mi (9,015.56 km) |
| Box Elder to Lom | 5,521.21 mi (8,885.53 km) |
| Box Elder to Lovech | 5,603.16 mi (9,017.41 km) |
| Box Elder to Lukovit | 5,583.48 mi (8,985.74 km) |
| Box Elder to Lyaskovets | 5,633.86 mi (9,066.83 km) |
| Box Elder to Mezdra | 5,572.63 mi (8,968.28 km) |
| Box Elder to Momchilgrad | 5,714.42 mi (9,196.47 km) |
