| Iowa City to Mangualde | 4,172.32 mi (6,714.69 km) |
| Iowa City to Marco de Canavezes | 4,134.26 mi (6,653.45 km) |
| Iowa City to Marinha Grande | 4,150.07 mi (6,678.89 km) |
| Iowa City to Massama | 4,170.25 mi (6,711.36 km) |
| Iowa City to Matosinhos | 4,109.68 mi (6,613.89 km) |
| Iowa City to Mealhada | 4,149.27 mi (6,677.61 km) |
| Iowa City to Melgaco | 4,096.24 mi (6,592.27 km) |
| Iowa City to Melres | 4,127.22 mi (6,642.12 km) |
| Iowa City to Mira | 4,134.72 mi (6,654.19 km) |
| Iowa City to Miranda do Corvo | 4,164.68 mi (6,702.41 km) |
| Iowa City to Mirandela | 4,166.58 mi (6,705.45 km) |
| Iowa City to Mogadouro | 4,192.62 mi (6,747.37 km) |
| Iowa City to Moimenta da Beira | 4,165.45 mi (6,703.65 km) |
| Iowa City to Moita | 4,187.50 mi (6,739.12 km) |
| Iowa City to Moncao | 4,088.32 mi (6,579.51 km) |
