| Iowa City to Orangevale (California) | 1,572.98 mi (2,531.47 km) |
| Iowa City to Orchards (Washington) | 1,563.94 mi (2,516.91 km) |
| Iowa City to Orcutt (California) | 1,627.33 mi (2,618.93 km) |
| Iowa City to Oregon (Ohio) | 417.91 mi (672.56 km) |
| Iowa City to Oregon (Wisconsin) | 140.24 mi (225.69 km) |
| Iowa City to Oregon City (Oregon) | 1,567.49 mi (2,522.62 km) |
| Iowa City to Orem (Utah) | 1,053.84 mi (1,696.00 km) |
| Iowa City to Orinda (California) | 1,639.58 mi (2,638.66 km) |
| Iowa City to Orland Park (Illinois) | 189.46 mi (304.91 km) |
| Iowa City to Orlando (Florida) | 1,075.86 mi (1,731.42 km) |
| Iowa City to Ormond Beach (Florida) | 1,034.23 mi (1,664.43 km) |
| Iowa City to Oro Valley (Arizona) | 1,243.65 mi (2,001.45 km) |
| Iowa City to Oroville (California) | 1,575.09 mi (2,534.86 km) |
| Iowa City to Oshkosh (Wisconsin) | 222.14 mi (357.50 km) |
| Iowa City to Oskaloosa (Iowa) | 62.72 mi (100.94 km) |
