| Mason City to Anoka (Minnesota) | 142.72 mi (229.69 km) |
| Mason City to Ansonia (Connecticut) | 1,034.61 mi (1,665.05 km) |
| Mason City to Antelope (California) | 1,494.10 mi (2,404.52 km) |
| Mason City to Anthem (Arizona) | 1,203.39 mi (1,936.67 km) |
| Mason City to Antioch (California) | 1,534.83 mi (2,470.07 km) |
| Mason City to Antioch (Illinois) | 264.00 mi (424.87 km) |
| Mason City to Apache Junction (Arizona) | 1,197.02 mi (1,926.42 km) |
| Mason City to Apex (North Carolina) | 918.61 mi (1,478.37 km) |
| Mason City to Apollo Beach (Florida) | 1,222.16 mi (1,966.88 km) |
| Mason City to Apopka (Florida) | 1,190.07 mi (1,915.23 km) |
| Mason City to Apple Valley (California) | 1,415.95 mi (2,278.75 km) |
| Mason City to Apple Valley (Minnesota) | 110.34 mi (177.58 km) |
| Mason City to Appleton (Wisconsin) | 252.55 mi (406.44 km) |
| Mason City to Arbutus (Maryland) | 897.90 mi (1,445.03 km) |
| Mason City to Arcadia (California) | 1,470.61 mi (2,366.72 km) |
