| North Adams to Karlovo | 4,655.02 mi (7,491.53 km) |
| North Adams to Karnobat | 4,742.06 mi (7,631.61 km) |
| North Adams to Kavarna | 4,759.94 mi (7,660.38 km) |
| North Adams to Kazanlak | 4,679.88 mi (7,531.55 km) |
| North Adams to Knezha | 4,589.96 mi (7,386.83 km) |
| North Adams to Kostinbrod | 4,583.70 mi (7,376.75 km) |
| North Adams to Kozloduy | 4,564.19 mi (7,345.36 km) |
| North Adams to Kyustendil | 4,584.24 mi (7,377.63 km) |
| North Adams to Levski | 4,637.34 mi (7,463.07 km) |
| North Adams to Lom | 4,542.66 mi (7,310.71 km) |
| North Adams to Lovech | 4,630.61 mi (7,452.25 km) |
| North Adams to Lukovit | 4,605.87 mi (7,412.43 km) |
| North Adams to Lyaskovets | 4,671.82 mi (7,518.57 km) |
| North Adams to Mezdra | 4,589.26 mi (7,385.71 km) |
| North Adams to Momchilgrad | 4,727.05 mi (7,607.46 km) |
