| Trets to Karlovo | 964.99 mi (1,553.01 km) |
| Trets to Karnobat | 1,074.03 mi (1,728.49 km) |
| Trets to Kavarna | 1,132.66 mi (1,822.84 km) |
| Trets to Kazanlak | 995.00 mi (1,601.30 km) |
| Trets to Knezha | 920.58 mi (1,481.54 km) |
| Trets to Kostinbrod | 883.40 mi (1,421.70 km) |
| Trets to Kozloduy | 901.30 mi (1,450.50 km) |
| Trets to Kyustendil | 863.03 mi (1,388.91 km) |
| Trets to Levski | 973.97 mi (1,567.46 km) |
| Trets to Lom | 876.42 mi (1,410.46 km) |
| Trets to Lovech | 955.28 mi (1,537.38 km) |
| Trets to Lukovit | 927.19 mi (1,492.17 km) |
| Trets to Lyaskovets | 1,005.53 mi (1,618.25 km) |
| Trets to Mezdra | 904.32 mi (1,455.36 km) |
| Trets to Momchilgrad | 1,011.50 mi (1,627.86 km) |
