| Mason City to Baraboo (Wisconsin) | 175.46 mi (282.37 km) |
| Mason City to Barberton (Ohio) | 612.21 mi (985.25 km) |
| Mason City to Bardstown (Kentucky) | 548.49 mi (882.71 km) |
| Mason City to Barrington (Illinois) | 266.73 mi (429.27 km) |
| Mason City to Barstow (California) | 1,396.03 mi (2,246.69 km) |
| Mason City to Bartlesville (Oklahoma) | 466.23 mi (750.33 km) |
| Mason City to Bartlett (Illinois) | 266.53 mi (428.94 km) |
| Mason City to Bartlett (Tennessee) | 575.91 mi (926.84 km) |
| Mason City to Bartow (Florida) | 1,230.78 mi (1,980.74 km) |
| Mason City to Batavia (Illinois) | 264.72 mi (426.02 km) |
| Mason City to Batavia (New York) | 757.10 mi (1,218.44 km) |
| Mason City to Batesville (Arkansas) | 516.77 mi (831.67 km) |
| Mason City to Baton Rouge (Louisiana) | 885.29 mi (1,424.74 km) |
| Mason City to Battle Creek (Michigan) | 408.63 mi (657.63 km) |
| Mason City to Battle Ground (Washington) | 1,449.97 mi (2,333.51 km) |
