| Douglas to Karlovo | 1,666.16 mi (2,681.43 km) |
| Douglas to Karnobat | 1,758.43 mi (2,829.92 km) |
| Douglas to Kavarna | 1,785.75 mi (2,873.89 km) |
| Douglas to Kazanlak | 1,692.18 mi (2,723.30 km) |
| Douglas to Knezha | 1,603.12 mi (2,579.97 km) |
| Douglas to Kostinbrod | 1,592.62 mi (2,563.08 km) |
| Douglas to Kozloduy | 1,577.86 mi (2,539.32 km) |
| Douglas to Kyustendil | 1,591.33 mi (2,561.00 km) |
| Douglas to Levski | 1,652.45 mi (2,659.37 km) |
| Douglas to Lom | 1,555.37 mi (2,503.12 km) |
| Douglas to Lovech | 1,643.58 mi (2,645.09 km) |
| Douglas to Lukovit | 1,617.89 mi (2,603.74 km) |
| Douglas to Lyaskovets | 1,687.12 mi (2,715.16 km) |
| Douglas to Mezdra | 1,600.13 mi (2,575.16 km) |
| Douglas to Momchilgrad | 1,735.76 mi (2,793.43 km) |
