| Mason City to Brownhills | 3,989.03 mi (6,419.73 km) |
| Mason City to Broxbourne | 4,090.39 mi (6,582.85 km) |
| Mason City to Broxburn | 3,824.77 mi (6,155.36 km) |
| Mason City to Bryn | 3,933.61 mi (6,330.54 km) |
| Mason City to Buckhurst Hill | 4,096.79 mi (6,593.14 km) |
| Mason City to Buckie | 3,786.86 mi (6,094.37 km) |
| Mason City to Buckingham | 4,046.47 mi (6,512.16 km) |
| Mason City to Buckley | 3,929.30 mi (6,323.60 km) |
| Mason City to Bucksburn | 3,828.76 mi (6,161.79 km) |
| Mason City to Bude | 3,955.67 mi (6,366.04 km) |
| Mason City to Bulwell | 4,003.09 mi (6,442.34 km) |
| Mason City to Burbage | 4,014.36 mi (6,460.48 km) |
| Mason City to Burgess Hill | 4,115.85 mi (6,623.82 km) |
| Mason City to Burnham | 4,074.78 mi (6,557.73 km) |
| Mason City to Burnham-on-Sea | 3,999.46 mi (6,436.51 km) |
