| Mason City to Brighton | 4,120.34 mi (6,631.05 km) |
| Mason City to Brimington | 3,987.16 mi (6,416.71 km) |
| Mason City to Brislington | 4,009.34 mi (6,452.41 km) |
| Mason City to Bristol | 4,006.58 mi (6,447.96 km) |
| Mason City to Brixham | 4,009.50 mi (6,452.67 km) |
| Mason City to Brixton | 4,097.61 mi (6,594.46 km) |
| Mason City to Broadstairs | 4,157.82 mi (6,691.36 km) |
| Mason City to Broadstone | 4,053.65 mi (6,523.71 km) |
| Mason City to Broadwater | 4,111.34 mi (6,616.56 km) |
| Mason City to Brockworth | 4,009.11 mi (6,452.04 km) |
| Mason City to Bromborough | 3,927.63 mi (6,320.92 km) |
| Mason City to Bromley | 4,104.51 mi (6,605.58 km) |
| Mason City to Bromsgrove | 3,995.41 mi (6,430.00 km) |
| Mason City to Broughton Astley | 4,018.71 mi (6,467.49 km) |
| Mason City to Broughty Ferry | 3,828.20 mi (6,160.90 km) |
