| Mason City to Belvedere Marittimo | 5,207.90 mi (8,381.30 km) |
| Mason City to Benevento | 5,094.01 mi (8,198.01 km) |
| Mason City to Bergamo | 4,692.77 mi (7,552.28 km) |
| Mason City to Bernalda | 5,199.76 mi (8,368.20 km) |
| Mason City to Bertinoro | 4,853.73 mi (7,811.33 km) |
| Mason City to Besana in Brianza | 4,678.20 mi (7,528.84 km) |
| Mason City to Besozzo | 4,648.68 mi (7,481.32 km) |
| Mason City to Biancavilla | 5,264.61 mi (8,472.57 km) |
| Mason City to Biassono | 4,680.53 mi (7,532.58 km) |
| Mason City to Bibbiano | 4,768.28 mi (7,673.81 km) |
| Mason City to Bibbiena | 4,862.59 mi (7,825.58 km) |
| Mason City to Biella | 4,638.60 mi (7,465.10 km) |
| Mason City to Bisceglie | 5,152.99 mi (8,292.94 km) |
| Mason City to Bisignano | 5,228.54 mi (8,414.52 km) |
| Mason City to Bitetto | 5,172.24 mi (8,323.91 km) |
