| Mason City to Ashtabula (Ohio) | 637.03 mi (1,025.20 km) |
| Mason City to Ashwaubenon (Wisconsin) | 270.84 mi (435.87 km) |
| Mason City to Aspen Hill (Maryland) | 882.78 mi (1,420.69 km) |
| Mason City to Astoria (Oregon) | 1,508.96 mi (2,428.43 km) |
| Mason City to Atascadero (California) | 1,553.32 mi (2,499.83 km) |
| Mason City to Atascocita (Texas) | 916.66 mi (1,475.23 km) |
| Mason City to Atchison (Kansas) | 267.35 mi (430.26 km) |
| Mason City to Athens (Alabama) | 667.88 mi (1,074.86 km) |
| Mason City to Athens (Georgia) | 827.06 mi (1,331.03 km) |
| Mason City to Athens (Ohio) | 633.66 mi (1,019.78 km) |
| Mason City to Athens (Tennessee) | 701.77 mi (1,129.38 km) |
| Mason City to Athens (Texas) | 769.66 mi (1,238.65 km) |
| Mason City to Atlanta (Georgia) | 802.80 mi (1,291.97 km) |
| Mason City to Atlantic Beach (Florida) | 1,097.32 mi (1,765.97 km) |
| Mason City to Atlantic City (New Jersey) | 1,005.47 mi (1,618.14 km) |
