| Dumbarton to Karlovo | 1,592.20 mi (2,562.40 km) |
| Dumbarton to Karnobat | 1,671.08 mi (2,689.34 km) |
| Dumbarton to Kavarna | 1,682.62 mi (2,707.92 km) |
| Dumbarton to Kazanlak | 1,614.72 mi (2,598.64 km) |
| Dumbarton to Knezha | 1,524.55 mi (2,453.53 km) |
| Dumbarton to Kostinbrod | 1,527.31 mi (2,457.98 km) |
| Dumbarton to Kozloduy | 1,498.36 mi (2,411.37 km) |
| Dumbarton to Kyustendil | 1,535.52 mi (2,471.18 km) |
| Dumbarton to Levski | 1,568.73 mi (2,524.63 km) |
| Dumbarton to Lom | 1,478.59 mi (2,379.56 km) |
| Dumbarton to Lovech | 1,564.97 mi (2,518.57 km) |
| Dumbarton to Lukovit | 1,542.09 mi (2,481.76 km) |
| Dumbarton to Lyaskovets | 1,602.64 mi (2,579.20 km) |
| Dumbarton to Mezdra | 1,527.92 mi (2,458.95 km) |
| Dumbarton to Momchilgrad | 1,669.18 mi (2,686.29 km) |
