| Mason City to Ayamonte | 4,343.74 mi (6,990.57 km) |
| Mason City to Azcoitia | 4,327.37 mi (6,964.24 km) |
| Mason City to Azpeitia | 4,329.14 mi (6,967.08 km) |
| Mason City to Azuqueca de Henares | 4,390.94 mi (7,066.54 km) |
| Mason City to Badajoz | 4,296.31 mi (6,914.24 km) |
| Mason City to Badalona | 4,585.95 mi (7,380.38 km) |
| Mason City to Baena | 4,464.46 mi (7,184.86 km) |
| Mason City to Baeza | 4,486.91 mi (7,220.98 km) |
| Mason City to Bailen | 4,469.66 mi (7,193.22 km) |
| Mason City to Balaguer | 4,512.27 mi (7,261.80 km) |
| Mason City to Banolas | 4,578.83 mi (7,368.91 km) |
| Mason City to Baranain | 4,369.06 mi (7,031.32 km) |
| Mason City to Barbadanes | 4,124.77 mi (6,638.17 km) |
| Mason City to Barbastro | 4,474.11 mi (7,200.39 km) |
| Mason City to Barcelona | 4,585.77 mi (7,380.09 km) |
