| Delfzijl to Karlovo | 1,103.42 mi (1,775.78 km) |
| Delfzijl to Karnobat | 1,179.48 mi (1,898.18 km) |
| Delfzijl to Kavarna | 1,189.90 mi (1,914.96 km) |
| Delfzijl to Kazanlak | 1,125.02 mi (1,810.54 km) |
| Delfzijl to Knezha | 1,035.09 mi (1,665.81 km) |
| Delfzijl to Kostinbrod | 1,041.44 mi (1,676.04 km) |
| Delfzijl to Kozloduy | 1,008.84 mi (1,623.57 km) |
| Delfzijl to Kyustendil | 1,052.90 mi (1,694.48 km) |
| Delfzijl to Levski | 1,078.02 mi (1,734.90 km) |
| Delfzijl to Lom | 989.84 mi (1,593.00 km) |
| Delfzijl to Lovech | 1,075.27 mi (1,730.48 km) |
| Delfzijl to Lukovit | 1,053.17 mi (1,694.91 km) |
| Delfzijl to Lyaskovets | 1,111.67 mi (1,789.06 km) |
| Delfzijl to Mezdra | 1,040.01 mi (1,673.73 km) |
| Delfzijl to Momchilgrad | 1,181.84 mi (1,901.99 km) |
