| Mason City to Boppard | 4,422.33 mi (7,117.06 km) |
| Mason City to Borgentreich | 4,423.84 mi (7,119.48 km) |
| Mason City to Borgholzhausen | 4,369.25 mi (7,031.63 km) |
| Mason City to Borken | 4,331.10 mi (6,970.23 km) |
| Mason City to Borna | 4,552.81 mi (7,327.03 km) |
| Mason City to Bornheim | 4,379.86 mi (7,048.71 km) |
| Mason City to Bosel | 4,320.34 mi (6,952.91 km) |
| Mason City to Bottrop | 4,345.61 mi (6,993.59 km) |
| Mason City to Bovenden | 4,445.68 mi (7,154.62 km) |
| Mason City to Brackenheim | 4,523.10 mi (7,279.22 km) |
| Mason City to Brake | 4,324.60 mi (6,959.77 km) |
| Mason City to Brakel | 4,415.25 mi (7,105.67 km) |
| Mason City to Bramsche | 4,346.13 mi (6,994.42 km) |
| Mason City to Brand | 4,350.70 mi (7,001.78 km) |
| Mason City to Brand-Erbisdorf | 4,591.19 mi (7,388.81 km) |
