| Mason City to Mountain Brook (Alabama) | 753.23 mi (1,212.21 km) |
| Mason City to Mountain Home (Arkansas) | 472.76 mi (760.83 km) |
| Mason City to Mountain Home (Idaho) | 1,130.79 mi (1,819.83 km) |
| Mason City to Mountain House (California) | 1,527.86 mi (2,458.85 km) |
| Mason City to Mountain Park (Georgia) | 807.39 mi (1,299.37 km) |
| Mason City to Mountain Top (Pennsylvania) | 895.26 mi (1,440.77 km) |
| Mason City to Mountain View (California) | 1,564.81 mi (2,518.31 km) |
| Mason City to Mountlake Terrace (Washington) | 1,437.27 mi (2,313.06 km) |
| Mason City to Mukilteo (Washington) | 1,437.39 mi (2,313.25 km) |
| Mason City to Muncie (Indiana) | 451.16 mi (726.08 km) |
| Mason City to Mundelein (Illinois) | 270.34 mi (435.07 km) |
| Mason City to Munhall (Pennsylvania) | 710.39 mi (1,143.26 km) |
| Mason City to Munster (Indiana) | 311.12 mi (500.69 km) |
| Mason City to Murfreesboro (Tennessee) | 620.27 mi (998.23 km) |
| Mason City to Murphy (Texas) | 723.91 mi (1,165.01 km) |
