| Mason City to Buena Park (California) | 1,479.38 mi (2,380.83 km) |
| Mason City to Buenaventura Lakes (Florida) | 1,217.41 mi (1,959.24 km) |
| Mason City to Buffalo (Minnesota) | 144.12 mi (231.94 km) |
| Mason City to Buffalo (New York) | 724.20 mi (1,165.48 km) |
| Mason City to Buffalo Grove (Illinois) | 274.61 mi (441.94 km) |
| Mason City to Buford (Georgia) | 796.61 mi (1,282.02 km) |
| Mason City to Bull Run (Virginia) | 870.31 mi (1,400.63 km) |
| Mason City to Bullhead City (Arizona) | 1,266.49 mi (2,038.22 km) |
| Mason City to Burbank (California) | 1,482.47 mi (2,385.80 km) |
| Mason City to Burbank (Illinois) | 293.34 mi (472.09 km) |
| Mason City to Burien (Washington) | 1,438.13 mi (2,314.44 km) |
| Mason City to Burkburnett (Texas) | 690.30 mi (1,110.94 km) |
| Mason City to Burke (Virginia) | 882.93 mi (1,420.93 km) |
| Mason City to Burke Centre (Virginia) | 880.76 mi (1,417.45 km) |
| Mason City to Burleson (Texas) | 768.18 mi (1,236.26 km) |
