| Mason City to Bixby (Oklahoma) | 517.67 mi (833.10 km) |
| Mason City to Black Forest (Colorado) | 660.08 mi (1,062.29 km) |
| Mason City to Blackfoot (Idaho) | 962.65 mi (1,549.24 km) |
| Mason City to Blackhawk (California) | 1,544.76 mi (2,486.05 km) |
| Mason City to Blacksburg (Virginia) | 787.15 mi (1,266.80 km) |
| Mason City to Blackwells Mills (New Jersey) | 973.43 mi (1,566.59 km) |
| Mason City to Blaine (Minnesota) | 139.63 mi (224.71 km) |
| Mason City to Bloomingdale (Florida) | 1,218.80 mi (1,961.47 km) |
| Mason City to Bloomingdale (Illinois) | 272.93 mi (439.24 km) |
| Mason City to Bloomington (California) | 1,442.75 mi (2,321.88 km) |
| Mason City to Bloomington (Illinois) | 285.50 mi (459.46 km) |
| Mason City to Bloomington (Indiana) | 442.87 mi (712.73 km) |
| Mason City to Bloomington (Minnesota) | 116.35 mi (187.25 km) |
| Mason City to Bloomsburg (Pennsylvania) | 869.88 mi (1,399.93 km) |
| Mason City to Blue Ash (Ohio) | 531.32 mi (855.08 km) |
