| Iowa City to Oswego (Illinois) | 164.80 mi (265.23 km) |
| Iowa City to Oswego (New York) | 773.87 mi (1,245.42 km) |
| Iowa City to Otsego (Minnesota) | 270.53 mi (435.38 km) |
| Iowa City to Ottawa (Illinois) | 141.45 mi (227.64 km) |
| Iowa City to Ottawa (Kansas) | 288.89 mi (464.92 km) |
| Iowa City to Ottumwa (Iowa) | 63.69 mi (102.51 km) |
| Iowa City to Overland (Missouri) | 213.46 mi (343.52 km) |
| Iowa City to Overland Park (Kansas) | 253.52 mi (408.01 km) |
| Iowa City to Overlea (Maryland) | 803.28 mi (1,292.75 km) |
| Iowa City to Oviedo (Florida) | 1,069.55 mi (1,721.28 km) |
| Iowa City to Owasso (Oklahoma) | 436.82 mi (703.00 km) |
| Iowa City to Owatonna (Minnesota) | 189.01 mi (304.19 km) |
| Iowa City to Owensboro (Kentucky) | 357.07 mi (574.66 km) |
| Iowa City to Owings Mills (Maryland) | 788.32 mi (1,268.68 km) |
| Iowa City to Owosso (Michigan) | 386.77 mi (622.44 km) |
