| Mason City to Isabela (Puerto Rico) | 2,285.61 mi (3,678.33 km) |
| Mason City to Iselin (New Jersey) | 985.68 mi (1,586.30 km) |
| Mason City to Isla Vista (California) | 1,549.20 mi (2,493.20 km) |
| Mason City to Issaquah (Washington) | 1,424.60 mi (2,292.68 km) |
| Mason City to Ithaca (New York) | 846.48 mi (1,362.29 km) |
| Mason City to Ives Estates (Florida) | 1,395.63 mi (2,246.04 km) |
| Mason City to Jackson (Michigan) | 450.81 mi (725.51 km) |
| Mason City to Jackson (Mississippi) | 765.93 mi (1,232.65 km) |
| Mason City to Jackson (Missouri) | 440.22 mi (708.47 km) |
| Mason City to Jackson (Tennessee) | 567.64 mi (913.53 km) |
| Mason City to Jackson (Wyoming) | 882.23 mi (1,419.81 km) |
| Mason City to Jacksonville (Alabama) | 759.92 mi (1,222.98 km) |
| Mason City to Jacksonville (Arkansas) | 574.13 mi (923.97 km) |
| Mason City to Jacksonville (Florida) | 1,089.18 mi (1,752.86 km) |
| Mason City to Jacksonville (Illinois) | 281.83 mi (453.56 km) |
