| Mason City to Barberino di Mugello | 4,827.23 mi (7,768.68 km) |
| Mason City to Barcellona-Pozzo di Gotto | 5,254.03 mi (8,455.55 km) |
| Mason City to Bareggio | 4,677.31 mi (7,527.40 km) |
| Mason City to Barga | 4,795.50 mi (7,717.60 km) |
| Mason City to Bari | 5,172.08 mi (8,323.65 km) |
| Mason City to Barletta | 5,141.20 mi (8,273.97 km) |
| Mason City to Baronissi | 5,112.02 mi (8,227.00 km) |
| Mason City to Barrafranca | 5,252.12 mi (8,452.47 km) |
| Mason City to Bassano del Grappa | 4,765.36 mi (7,669.11 km) |
| Mason City to Battipaglia | 5,126.26 mi (8,249.91 km) |
| Mason City to Beinasco | 4,644.27 mi (7,474.22 km) |
| Mason City to Bellinzago Novarese | 4,659.11 mi (7,498.11 km) |
| Mason City to Belluno | 4,765.90 mi (7,669.98 km) |
| Mason City to Belmonte Mezzagno | 5,187.22 mi (8,348.02 km) |
| Mason City to Belpasso | 5,272.39 mi (8,485.10 km) |
