| Mason City to Camarillo (California) | 1,515.56 mi (2,439.06 km) |
| Mason City to Camas (Washington) | 1,445.39 mi (2,326.14 km) |
| Mason City to Cambridge (Maryland) | 947.43 mi (1,524.74 km) |
| Mason City to Cambridge (Massachusetts) | 1,118.13 mi (1,799.46 km) |
| Mason City to Camden (Arkansas) | 662.29 mi (1,065.86 km) |
| Mason City to Camden (New Jersey) | 959.53 mi (1,544.21 km) |
| Mason City to Cameron Park (California) | 1,476.30 mi (2,375.88 km) |
| Mason City to Camp Pendleton South (California) | 1,474.19 mi (2,372.47 km) |
| Mason City to Camp Springs (Maryland) | 898.89 mi (1,446.63 km) |
| Mason City to Camp Verde (Arizona) | 1,161.83 mi (1,869.79 km) |
| Mason City to Campbell (California) | 1,561.85 mi (2,513.56 km) |
| Mason City to Campbellsville (Kentucky) | 575.83 mi (926.70 km) |
| Mason City to Campton Hills (Illinois) | 257.12 mi (413.80 km) |
| Mason City to Canby (Oregon) | 1,459.52 mi (2,348.88 km) |
| Mason City to Candelaria (Puerto Rico) | 2,322.20 mi (3,737.22 km) |
