| Mason City to Morristown (New Jersey) | 973.25 mi (1,566.30 km) |
| Mason City to Morristown (Tennessee) | 711.37 mi (1,144.83 km) |
| Mason City to Morrisville (North Carolina) | 915.54 mi (1,473.42 km) |
| Mason City to Morro Bay (California) | 1,565.12 mi (2,518.82 km) |
| Mason City to Morton (Illinois) | 259.86 mi (418.21 km) |
| Mason City to Morton Grove (Illinois) | 285.56 mi (459.57 km) |
| Mason City to Moscow (Idaho) | 1,185.12 mi (1,907.26 km) |
| Mason City to Moses Lake (Washington) | 1,293.86 mi (2,082.27 km) |
| Mason City to Moss Bluff (Louisiana) | 887.49 mi (1,428.28 km) |
| Mason City to Moss Point (Mississippi) | 915.98 mi (1,474.12 km) |
| Mason City to Moultrie (Georgia) | 976.19 mi (1,571.02 km) |
| Mason City to Mounds View (Minnesota) | 135.31 mi (217.77 km) |
| Mason City to Mount Airy (North Carolina) | 808.76 mi (1,301.57 km) |
| Mason City to Mount Clemens (Michigan) | 523.49 mi (842.48 km) |
| Mason City to Mount Dora (Florida) | 1,180.22 mi (1,899.37 km) |
