| Duncan to Karlovo | 5,994.58 mi (9,647.35 km) |
| Duncan to Karnobat | 6,070.88 mi (9,770.13 km) |
| Duncan to Kavarna | 6,075.57 mi (9,777.69 km) |
| Duncan to Kazanlak | 6,016.77 mi (9,683.05 km) |
| Duncan to Knezha | 5,926.69 mi (9,538.09 km) |
| Duncan to Kostinbrod | 5,929.50 mi (9,542.61 km) |
| Duncan to Kozloduy | 5,900.47 mi (9,495.89 km) |
| Duncan to Kyustendil | 5,936.25 mi (9,553.47 km) |
| Duncan to Levski | 5,969.98 mi (9,607.75 km) |
| Duncan to Lom | 5,880.96 mi (9,464.48 km) |
| Duncan to Lovech | 5,967.01 mi (9,602.97 km) |
| Duncan to Lukovit | 5,944.43 mi (9,566.63 km) |
| Duncan to Lyaskovets | 6,003.57 mi (9,661.81 km) |
| Duncan to Mezdra | 5,930.40 mi (9,544.05 km) |
| Duncan to Momchilgrad | 6,071.62 mi (9,771.32 km) |
