| Mason City to Berkeley (California) | 1,561.81 mi (2,513.48 km) |
| Mason City to Berkley (Colorado) | 653.74 mi (1,052.10 km) |
| Mason City to Berkley (Michigan) | 509.17 mi (819.43 km) |
| Mason City to Berthoud (Colorado) | 640.81 mi (1,031.28 km) |
| Mason City to Berwick (Pennsylvania) | 879.33 mi (1,415.14 km) |
| Mason City to Berwyn (Illinois) | 289.87 mi (466.50 km) |
| Mason City to Bessemer (Alabama) | 754.76 mi (1,214.68 km) |
| Mason City to Bethany (Oklahoma) | 578.68 mi (931.29 km) |
| Mason City to Bethany (Oregon) | 1,465.20 mi (2,358.01 km) |
| Mason City to Bethel Park (Pennsylvania) | 705.33 mi (1,135.12 km) |
| Mason City to Bethesda (Maryland) | 883.97 mi (1,422.61 km) |
| Mason City to Bethlehem (Pennsylvania) | 931.74 mi (1,499.49 km) |
| Mason City to Bethpage (New York) | 1,024.06 mi (1,648.07 km) |
| Mason City to Bettendorf (Iowa) | 176.89 mi (284.67 km) |
| Mason City to Beverly (Massachusetts) | 1,128.68 mi (1,816.43 km) |
