| Mason City to Mauldin (South Carolina) | 821.36 mi (1,321.85 km) |
| Mason City to Maumee (Ohio) | 498.64 mi (802.49 km) |
| Mason City to Maumelle (Arkansas) | 574.83 mi (925.10 km) |
| Mason City to Mayagüez (Puerto Rico) | 2,297.79 mi (3,697.93 km) |
| Mason City to Mayfield Heights (Ohio) | 609.92 mi (981.57 km) |
| Mason City to Mays Chapel (Maryland) | 894.86 mi (1,440.15 km) |
| Mason City to Maywood (California) | 1,483.28 mi (2,387.11 km) |
| Mason City to Maywood (Illinois) | 286.43 mi (460.97 km) |
| Mason City to McAlester (Oklahoma) | 584.62 mi (940.85 km) |
| Mason City to McAllen (Texas) | 1,203.33 mi (1,936.57 km) |
| Mason City to McCalla (Alabama) | 757.72 mi (1,219.43 km) |
| Mason City to McComb (Mississippi) | 835.98 mi (1,345.38 km) |
| Mason City to McDonough (Georgia) | 830.03 mi (1,335.81 km) |
| Mason City to McFarland (California) | 1,475.47 mi (2,374.54 km) |
| Mason City to McHenry (Illinois) | 255.14 mi (410.60 km) |
