| Naugatuck to Karlovo | 4,703.31 mi (7,569.25 km) |
| Naugatuck to Karnobat | 4,791.58 mi (7,711.31 km) |
| Naugatuck to Kavarna | 4,810.98 mi (7,742.52 km) |
| Naugatuck to Kazanlak | 4,728.49 mi (7,609.77 km) |
| Naugatuck to Knezha | 4,638.72 mi (7,465.30 km) |
| Naugatuck to Kostinbrod | 4,631.28 mi (7,453.33 km) |
| Naugatuck to Kozloduy | 4,613.05 mi (7,423.99 km) |
| Naugatuck to Kyustendil | 4,630.97 mi (7,452.82 km) |
| Naugatuck to Levski | 4,686.54 mi (7,542.26 km) |
| Naugatuck to Lom | 4,591.29 mi (7,388.97 km) |
| Naugatuck to Lovech | 4,679.35 mi (7,530.69 km) |
| Naugatuck to Lukovit | 4,654.37 mi (7,490.49 km) |
| Naugatuck to Lyaskovets | 4,721.09 mi (7,597.86 km) |
| Naugatuck to Mezdra | 4,637.45 mi (7,463.26 km) |
| Naugatuck to Momchilgrad | 4,774.59 mi (7,683.96 km) |
