| Dubuque to Karlovo | 5,323.75 mi (8,567.76 km) |
| Dubuque to Karnobat | 5,398.93 mi (8,688.74 km) |
| Dubuque to Kavarna | 5,402.74 mi (8,694.87 km) |
| Dubuque to Kazanlak | 5,345.63 mi (8,602.95 km) |
| Dubuque to Knezha | 5,255.64 mi (8,458.14 km) |
| Dubuque to Kostinbrod | 5,259.50 mi (8,464.36 km) |
| Dubuque to Kozloduy | 5,229.40 mi (8,415.91 km) |
| Dubuque to Kyustendil | 5,267.11 mi (8,476.59 km) |
| Dubuque to Levski | 5,298.47 mi (8,527.07 km) |
| Dubuque to Lom | 5,210.13 mi (8,384.89 km) |
| Dubuque to Lovech | 5,295.87 mi (8,522.89 km) |
| Dubuque to Lukovit | 5,273.55 mi (8,486.96 km) |
| Dubuque to Lyaskovets | 5,331.95 mi (8,580.94 km) |
| Dubuque to Mezdra | 5,259.83 mi (8,464.87 km) |
| Dubuque to Momchilgrad | 5,401.27 mi (8,692.51 km) |
