| Mason City to Isny im Allgau | 4,618.21 mi (7,432.29 km) |
| Mason City to Isselburg | 4,317.28 mi (6,947.99 km) |
| Mason City to Issum | 4,327.69 mi (6,964.74 km) |
| Mason City to Itzehoe | 4,334.20 mi (6,975.22 km) |
| Mason City to Jena | 4,530.46 mi (7,291.07 km) |
| Mason City to Jever | 4,295.42 mi (6,912.81 km) |
| Mason City to Jork | 4,355.82 mi (7,010.01 km) |
| Mason City to Juchen | 4,348.21 mi (6,997.76 km) |
| Mason City to Julich | 4,350.46 mi (7,001.39 km) |
| Mason City to Juterbog | 4,533.03 mi (7,295.21 km) |
| Mason City to Kaarst | 4,347.52 mi (6,996.66 km) |
| Mason City to Kaiserslautern | 4,461.60 mi (7,180.26 km) |
| Mason City to Kalkar | 4,315.04 mi (6,944.39 km) |
| Mason City to Kall | 4,372.43 mi (7,036.75 km) |
| Mason City to Kaltenkirchen | 4,352.19 mi (7,004.17 km) |
