| Iowa City to Karlovo | 5,395.27 mi (8,682.84 km) |
| Iowa City to Karnobat | 5,470.61 mi (8,804.09 km) |
| Iowa City to Kavarna | 5,474.55 mi (8,810.44 km) |
| Iowa City to Kazanlak | 5,417.18 mi (8,718.11 km) |
| Iowa City to Knezha | 5,327.18 mi (8,573.27 km) |
| Iowa City to Kostinbrod | 5,330.90 mi (8,579.26 km) |
| Iowa City to Kozloduy | 5,300.94 mi (8,531.04 km) |
| Iowa City to Kyustendil | 5,338.39 mi (8,591.30 km) |
| Iowa City to Levski | 5,370.08 mi (8,642.31 km) |
| Iowa City to Lom | 5,281.64 mi (8,499.97 km) |
| Iowa City to Lovech | 5,367.43 mi (8,638.04 km) |
| Iowa City to Lukovit | 5,345.07 mi (8,602.06 km) |
| Iowa City to Lyaskovets | 5,403.57 mi (8,696.21 km) |
| Iowa City to Mezdra | 5,331.30 mi (8,579.90 km) |
| Iowa City to Momchilgrad | 5,472.72 mi (8,807.49 km) |
