| Iowa City to McKeesport (Pennsylvania) | 615.63 mi (990.76 km) |
| Iowa City to McKinleyville (California) | 1,680.41 mi (2,704.36 km) |
| Iowa City to McKinney (Texas) | 648.25 mi (1,043.26 km) |
| Iowa City to McLean (Virginia) | 777.32 mi (1,250.98 km) |
| Iowa City to McMinnville (Oregon) | 1,596.94 mi (2,570.03 km) |
| Iowa City to McMinnville (Tennessee) | 515.76 mi (830.04 km) |
| Iowa City to McNair (Virginia) | 766.09 mi (1,232.90 km) |
| Iowa City to McPherson (Kansas) | 395.73 mi (636.87 km) |
| Iowa City to Mead Valley (California) | 1,500.30 mi (2,414.50 km) |
| Iowa City to Meadow Woods (Florida) | 1,082.04 mi (1,741.37 km) |
| Iowa City to Meadowbrook (Virginia) | 802.64 mi (1,291.73 km) |
| Iowa City to Meadville (Pennsylvania) | 587.26 mi (945.11 km) |
| Iowa City to Mebane (North Carolina) | 762.37 mi (1,226.91 km) |
| Iowa City to Mechanicsville (Virginia) | 802.72 mi (1,291.85 km) |
| Iowa City to Medford (Massachusetts) | 1,046.73 mi (1,684.56 km) |
