| Flensburg to Karlovo | 1,088.00 mi (1,750.97 km) |
| Flensburg to Karnobat | 1,153.28 mi (1,856.02 km) |
| Flensburg to Kavarna | 1,153.10 mi (1,855.73 km) |
| Flensburg to Kazanlak | 1,106.68 mi (1,781.03 km) |
| Flensburg to Knezha | 1,018.55 mi (1,639.20 km) |
| Flensburg to Kostinbrod | 1,033.76 mi (1,663.68 km) |
| Flensburg to Kozloduy | 992.48 mi (1,597.24 km) |
| Flensburg to Kyustendil | 1,051.23 mi (1,691.79 km) |
| Flensburg to Levski | 1,056.72 mi (1,700.63 km) |
| Flensburg to Lom | 976.01 mi (1,570.74 km) |
| Flensburg to Lovech | 1,057.52 mi (1,701.91 km) |
| Flensburg to Lukovit | 1,037.98 mi (1,670.46 km) |
| Flensburg to Lyaskovets | 1,088.98 mi (1,752.55 km) |
| Flensburg to Mezdra | 1,027.68 mi (1,653.89 km) |
| Flensburg to Momchilgrad | 1,169.18 mi (1,881.61 km) |
