| Fitchburg to Karlovo | 4,606.53 mi (7,413.50 km) |
| Fitchburg to Karnobat | 4,694.43 mi (7,554.96 km) |
| Fitchburg to Kavarna | 4,713.40 mi (7,585.48 km) |
| Fitchburg to Kazanlak | 4,631.61 mi (7,453.86 km) |
| Fitchburg to Knezha | 4,541.80 mi (7,309.31 km) |
| Fitchburg to Kostinbrod | 4,534.73 mi (7,297.95 km) |
| Fitchburg to Kozloduy | 4,516.09 mi (7,267.95 km) |
| Fitchburg to Kyustendil | 4,534.71 mi (7,297.91 km) |
| Fitchburg to Levski | 4,589.48 mi (7,386.06 km) |
| Fitchburg to Lom | 4,494.40 mi (7,233.05 km) |
| Fitchburg to Lovech | 4,582.43 mi (7,374.71 km) |
| Fitchburg to Lukovit | 4,557.53 mi (7,334.63 km) |
| Fitchburg to Lyaskovets | 4,624.01 mi (7,441.62 km) |
| Fitchburg to Mezdra | 4,540.71 mi (7,307.56 km) |
| Fitchburg to Momchilgrad | 4,678.06 mi (7,528.61 km) |
