| Mason City to Bound Brook (New Jersey) | 974.61 mi (1,568.48 km) |
| Mason City to Bountiful (Utah) | 968.95 mi (1,559.38 km) |
| Mason City to Bourbonnais (Illinois) | 304.40 mi (489.89 km) |
| Mason City to Bowie (Maryland) | 903.42 mi (1,453.91 km) |
| Mason City to Bowling Green (Kentucky) | 556.39 mi (895.43 km) |
| Mason City to Bowling Green (Ohio) | 503.12 mi (809.69 km) |
| Mason City to Box Elder (South Dakota) | 498.36 mi (802.03 km) |
| Mason City to Boynton Beach (Florida) | 1,364.50 mi (2,195.95 km) |
| Mason City to Bozeman (Montana) | 896.47 mi (1,442.73 km) |
| Mason City to Bradenton (Florida) | 1,234.21 mi (1,986.27 km) |
| Mason City to Bradfordville (Florida) | 999.64 mi (1,608.77 km) |
| Mason City to Bradley (Illinois) | 306.54 mi (493.33 km) |
| Mason City to Bradley Gardens (New Jersey) | 968.03 mi (1,557.89 km) |
| Mason City to Brainerd (Minnesota) | 226.90 mi (365.16 km) |
| Mason City to Brambleton (Virginia) | 863.91 mi (1,390.33 km) |
