| Mason City to Karlovo | 5,375.61 mi (8,651.21 km) |
| Mason City to Karnobat | 5,448.15 mi (8,767.95 km) |
| Mason City to Kavarna | 5,449.12 mi (8,769.51 km) |
| Mason City to Kazanlak | 5,396.80 mi (8,685.32 km) |
| Mason City to Knezha | 5,307.08 mi (8,540.92 km) |
| Mason City to Kostinbrod | 5,313.00 mi (8,550.45 km) |
| Mason City to Kozloduy | 5,280.82 mi (8,498.67 km) |
| Mason City to Kyustendil | 5,322.03 mi (8,564.98 km) |
| Mason City to Levski | 5,348.86 mi (8,608.16 km) |
| Mason City to Lom | 5,262.07 mi (8,468.48 km) |
| Mason City to Lovech | 5,347.11 mi (8,605.34 km) |
| Mason City to Lukovit | 5,325.34 mi (8,570.31 km) |
| Mason City to Lyaskovets | 5,382.03 mi (8,661.54 km) |
| Mason City to Mezdra | 5,312.25 mi (8,549.24 km) |
| Mason City to Momchilgrad | 5,454.02 mi (8,777.39 km) |
