| Mason City to Badger (Alaska) | 2,543.70 mi (4,093.70 km) |
| Mason City to Bailey's Crossroads (Virginia) | 887.37 mi (1,428.08 km) |
| Mason City to Bainbridge (Georgia) | 969.31 mi (1,559.95 km) |
| Mason City to Bainbridge Island (Washington) | 1,447.91 mi (2,330.18 km) |
| Mason City to Baker (Louisiana) | 875.42 mi (1,408.85 km) |
| Mason City to Bakersfield (California) | 1,476.18 mi (2,375.67 km) |
| Mason City to Balch Springs (Texas) | 744.06 mi (1,197.45 km) |
| Mason City to Baldwin (New York) | 1,019.80 mi (1,641.21 km) |
| Mason City to Baldwin (Pennsylvania) | 707.68 mi (1,138.91 km) |
| Mason City to Baldwin Park (California) | 1,469.37 mi (2,364.73 km) |
| Mason City to Ballenger Creek (Maryland) | 858.31 mi (1,381.32 km) |
| Mason City to Ballwin (Missouri) | 343.69 mi (553.12 km) |
| Mason City to Baltimore (Maryland) | 900.08 mi (1,448.55 km) |
| Mason City to Bangor (Maine) | 1,214.32 mi (1,954.26 km) |
| Mason City to Banning (California) | 1,423.01 mi (2,290.12 km) |
