| Mason City to Bonham (Texas) | 680.02 mi (1,094.39 km) |
| Mason City to Bonita (California) | 1,479.78 mi (2,381.48 km) |
| Mason City to Bonita Springs (Florida) | 1,325.99 mi (2,133.97 km) |
| Mason City to Bonney Lake (Washington) | 1,429.88 mi (2,301.18 km) |
| Mason City to Boone (Iowa) | 83.17 mi (133.84 km) |
| Mason City to Boone (North Carolina) | 777.13 mi (1,250.67 km) |
| Mason City to Borger (Texas) | 677.12 mi (1,089.73 km) |
| Mason City to Bossier City (Louisiana) | 734.64 mi (1,182.30 km) |
| Mason City to Boston (Massachusetts) | 1,120.51 mi (1,803.29 km) |
| Mason City to Bostonia (California) | 1,469.69 mi (2,365.24 km) |
| Mason City to Bothell (Washington) | 1,432.43 mi (2,305.27 km) |
| Mason City to Bothell East (Washington) | 1,431.59 mi (2,303.92 km) |
| Mason City to Bothell West (Washington) | 1,434.17 mi (2,308.07 km) |
| Mason City to Boulder (Colorado) | 658.48 mi (1,059.72 km) |
| Mason City to Boulder City (Nevada) | 1,258.87 mi (2,025.95 km) |
