| Iowa City to Montalegre | 4,127.57 mi (6,642.68 km) |
| Iowa City to Montemor-o-Novo | 4,222.61 mi (6,795.64 km) |
| Iowa City to Montemor-o-Velho | 4,146.48 mi (6,673.12 km) |
| Iowa City to Montijo | 4,190.11 mi (6,743.32 km) |
| Iowa City to Mortagua | 4,157.24 mi (6,690.43 km) |
| Iowa City to Moura | 4,276.79 mi (6,882.83 km) |
| Iowa City to Murtosa | 4,128.57 mi (6,644.29 km) |
| Iowa City to Nazare | 4,149.38 mi (6,677.78 km) |
| Iowa City to Nelas | 4,171.47 mi (6,713.33 km) |
| Iowa City to Obidos | 4,153.91 mi (6,685.08 km) |
| Iowa City to Odemira | 4,242.76 mi (6,828.06 km) |
| Iowa City to Odivelas | 4,173.40 mi (6,716.43 km) |
| Iowa City to Oeiras | 4,170.98 mi (6,712.55 km) |
| Iowa City to Olhao | 4,300.20 mi (6,920.50 km) |
| Iowa City to Oliveira de Azemeis | 4,131.89 mi (6,649.64 km) |
