| Mason City to Bispham | 3,907.98 mi (6,289.29 km) |
| Mason City to Blackburn | 3,931.40 mi (6,326.97 km) |
| Mason City to Blackpool | 3,908.92 mi (6,290.80 km) |
| Mason City to Blairgowrie | 3,808.33 mi (6,128.91 km) |
| Mason City to Blandford Forum | 4,043.88 mi (6,507.99 km) |
| Mason City to Blaydon | 3,917.05 mi (6,303.89 km) |
| Mason City to Bletchley | 4,055.73 mi (6,527.06 km) |
| Mason City to Bloxwich | 3,987.62 mi (6,417.45 km) |
| Mason City to Blunsdon Saint Andrew | 4,030.84 mi (6,487.01 km) |
| Mason City to Blyth | 3,918.63 mi (6,306.43 km) |
| Mason City to Bo'ness | 3,817.40 mi (6,143.51 km) |
| Mason City to Bodmin | 3,961.32 mi (6,375.13 km) |
| Mason City to Bognor Regis | 4,101.86 mi (6,601.30 km) |
| Mason City to Bolsover | 3,991.80 mi (6,424.18 km) |
| Mason City to Bolton | 3,939.07 mi (6,339.32 km) |
