| Portlethen to Karlovo | 1,541.80 mi (2,481.28 km) |
| Portlethen to Karnobat | 1,615.11 mi (2,599.27 km) |
| Portlethen to Kavarna | 1,620.92 mi (2,608.62 km) |
| Portlethen to Kazanlak | 1,562.83 mi (2,515.13 km) |
| Portlethen to Knezha | 1,473.15 mi (2,370.80 km) |
| Portlethen to Kostinbrod | 1,480.73 mi (2,383.00 km) |
| Portlethen to Kozloduy | 1,446.89 mi (2,328.55 km) |
| Portlethen to Kyustendil | 1,492.33 mi (2,401.67 km) |
| Portlethen to Levski | 1,515.01 mi (2,438.17 km) |
| Portlethen to Lom | 1,428.34 mi (2,298.69 km) |
| Portlethen to Lovech | 1,513.14 mi (2,435.16 km) |
| Portlethen to Lukovit | 1,491.52 mi (2,400.37 km) |
| Portlethen to Lyaskovets | 1,548.32 mi (2,491.78 km) |
| Portlethen to Mezdra | 1,478.81 mi (2,379.91 km) |
| Portlethen to Momchilgrad | 1,620.74 mi (2,608.32 km) |
