| Sun Prairie to Karlovo | 5,238.31 mi (8,430.24 km) |
| Sun Prairie to Karnobat | 5,313.96 mi (8,552.00 km) |
| Sun Prairie to Kavarna | 5,318.32 mi (8,559.01 km) |
| Sun Prairie to Kazanlak | 5,260.30 mi (8,465.63 km) |
| Sun Prairie to Knezha | 5,170.28 mi (8,320.76 km) |
| Sun Prairie to Kostinbrod | 5,173.78 mi (8,326.40 km) |
| Sun Prairie to Kozloduy | 5,144.04 mi (8,278.53 km) |
| Sun Prairie to Kyustendil | 5,181.15 mi (8,338.25 km) |
| Sun Prairie to Levski | 5,213.29 mi (8,389.99 km) |
| Sun Prairie to Lom | 5,124.68 mi (8,247.37 km) |
| Sun Prairie to Lovech | 5,210.54 mi (8,385.56 km) |
| Sun Prairie to Lukovit | 5,188.12 mi (8,349.47 km) |
| Sun Prairie to Lyaskovets | 5,246.82 mi (8,443.94 km) |
| Sun Prairie to Mezdra | 5,174.29 mi (8,327.21 km) |
| Sun Prairie to Momchilgrad | 5,315.66 mi (8,554.73 km) |
