| Iowa City to Odessa (Texas) | 900.99 mi (1,450.01 km) |
| Iowa City to Ogden (Utah) | 1,056.50 mi (1,700.27 km) |
| Iowa City to Oildale (California) | 1,539.72 mi (2,477.94 km) |
| Iowa City to Ojus (Florida) | 1,263.34 mi (2,033.15 km) |
| Iowa City to Okemos (Michigan) | 371.41 mi (597.73 km) |
| Iowa City to Oklahoma City (Oklahoma) | 535.70 mi (862.13 km) |
| Iowa City to Okmulgee (Oklahoma) | 482.19 mi (776.01 km) |
| Iowa City to Olathe (Kansas) | 258.37 mi (415.80 km) |
| Iowa City to Old Jamestown (Missouri) | 205.38 mi (330.53 km) |
| Iowa City to Oldsmar (Florida) | 1,064.41 mi (1,713.00 km) |
| Iowa City to Olean (New York) | 673.91 mi (1,084.55 km) |
| Iowa City to Olive Branch (Mississippi) | 471.46 mi (758.74 km) |
| Iowa City to Olivehurst (California) | 1,582.58 mi (2,546.91 km) |
| Iowa City to Olney (Maryland) | 779.26 mi (1,254.09 km) |
| Iowa City to Olympia (Washington) | 1,582.30 mi (2,546.47 km) |
