| Iowa City to Ayr | 3,815.54 mi (6,140.51 km) |
| Iowa City to Bacup | 3,956.16 mi (6,366.82 km) |
| Iowa City to Baguley | 3,963.06 mi (6,377.92 km) |
| Iowa City to Baildon | 3,967.28 mi (6,384.71 km) |
| Iowa City to Bailleston | 3,822.47 mi (6,151.66 km) |
| Iowa City to Balderton | 4,029.11 mi (6,484.23 km) |
| Iowa City to Baldock | 4,086.27 mi (6,576.21 km) |
| Iowa City to Balham | 4,106.36 mi (6,608.55 km) |
| Iowa City to Bamber Bridge | 3,938.61 mi (6,338.58 km) |
| Iowa City to Banbridge | 3,788.61 mi (6,097.17 km) |
| Iowa City to Banbury | 4,041.33 mi (6,503.90 km) |
| Iowa City to Bangor | 3,801.08 mi (6,117.25 km) |
| Iowa City to Bangor | 3,900.26 mi (6,276.86 km) |
| Iowa City to Banstead | 4,108.61 mi (6,612.17 km) |
| Iowa City to Bargoed | 3,982.00 mi (6,408.40 km) |
