| Mason City to Barking | 4,101.77 mi (6,601.16 km) |
| Mason City to Barnet | 4,087.76 mi (6,578.62 km) |
| Mason City to Barnoldswick | 3,936.11 mi (6,334.56 km) |
| Mason City to Barnsley | 3,973.67 mi (6,395.01 km) |
| Mason City to Barnstaple | 3,965.03 mi (6,381.10 km) |
| Mason City to Barrhead | 3,797.34 mi (6,111.23 km) |
| Mason City to Barri | 3,983.31 mi (6,410.51 km) |
| Mason City to Barrow in Furness | 3,892.76 mi (6,264.78 km) |
| Mason City to Barton upon Humber | 4,005.53 mi (6,446.27 km) |
| Mason City to Barton upon Irwell | 3,945.02 mi (6,348.89 km) |
| Mason City to Barwell | 4,013.00 mi (6,458.30 km) |
| Mason City to Basford | 4,004.90 mi (6,445.26 km) |
| Mason City to Basildon | 4,115.18 mi (6,622.75 km) |
| Mason City to Basingstoke | 4,069.01 mi (6,548.45 km) |
| Mason City to Bath | 4,017.97 mi (6,466.30 km) |
