| Iowa City to Benavente | 4,184.39 mi (6,734.12 km) |
| Iowa City to Bombarral | 4,157.26 mi (6,690.47 km) |
| Iowa City to Bougado | 4,110.57 mi (6,615.33 km) |
| Iowa City to Braga | 4,109.27 mi (6,613.24 km) |
| Iowa City to Braganca | 4,173.77 mi (6,717.03 km) |
| Iowa City to Cabeceiras de Basto | 4,127.81 mi (6,643.08 km) |
| Iowa City to Cacem | 4,168.22 mi (6,708.11 km) |
| Iowa City to Cadaval | 4,161.04 mi (6,696.55 km) |
| Iowa City to Caldas da Rainha | 4,153.15 mi (6,683.85 km) |
| Iowa City to Calheta | 4,012.96 mi (6,458.23 km) |
| Iowa City to Camara de Lobos | 4,023.32 mi (6,474.91 km) |
| Iowa City to Canico | 4,031.60 mi (6,488.23 km) |
| Iowa City to Cantanhede | 4,144.10 mi (6,669.29 km) |
| Iowa City to Carregal do Sal | 4,167.73 mi (6,707.31 km) |
| Iowa City to Cartaxo | 4,178.51 mi (6,724.66 km) |
