| Seia to Karlovo | 1,678.05 mi (2,700.56 km) |
| Seia to Karnobat | 1,788.04 mi (2,877.57 km) |
| Seia to Kavarna | 1,849.51 mi (2,976.49 km) |
| Seia to Kazanlak | 1,708.21 mi (2,749.10 km) |
| Seia to Knezha | 1,636.77 mi (2,634.13 km) |
| Seia to Kostinbrod | 1,596.57 mi (2,569.43 km) |
| Seia to Kozloduy | 1,618.23 mi (2,604.29 km) |
| Seia to Kyustendil | 1,572.82 mi (2,531.21 km) |
| Seia to Levski | 1,689.97 mi (2,719.74 km) |
| Seia to Lom | 1,593.40 mi (2,564.33 km) |
| Seia to Lovech | 1,670.38 mi (2,688.21 km) |
| Seia to Lukovit | 1,642.37 mi (2,643.14 km) |
| Seia to Lyaskovets | 1,720.80 mi (2,769.37 km) |
| Seia to Mezdra | 1,619.17 mi (2,605.80 km) |
| Seia to Momchilgrad | 1,718.70 mi (2,765.98 km) |
