| Northport to Karlovo | 5,674.10 mi (9,131.58 km) |
| Northport to Karnobat | 5,760.06 mi (9,269.91 km) |
| Northport to Kavarna | 5,776.10 mi (9,295.74 km) |
| Northport to Kazanlak | 5,698.73 mi (9,171.21 km) |
| Northport to Knezha | 5,608.70 mi (9,026.33 km) |
| Northport to Kostinbrod | 5,603.27 mi (9,017.59 km) |
| Northport to Kozloduy | 5,582.86 mi (8,984.74 km) |
| Northport to Kyustendil | 5,604.23 mi (9,019.14 km) |
| Northport to Levski | 5,655.67 mi (9,101.92 km) |
| Northport to Lom | 5,561.52 mi (8,950.40 km) |
| Northport to Lovech | 5,649.35 mi (9,091.75 km) |
| Northport to Lukovit | 5,624.81 mi (9,052.26 km) |
| Northport to Lyaskovets | 5,690.09 mi (9,157.31 km) |
| Northport to Mezdra | 5,608.44 mi (9,025.91 km) |
| Northport to Momchilgrad | 5,746.63 mi (9,248.30 km) |
