| Council Bluffs to Olympia Heights (Florida) | 1,391.12 mi (2,238.79 km) |
| Council Bluffs to Omaha (Nebraska) | 10.61 mi (17.07 km) |
| Council Bluffs to On Top of the World Designated Place (Florida) | 1,132.75 mi (1,822.99 km) |
| Council Bluffs to Onalaska (Wisconsin) | 298.94 mi (481.10 km) |
| Council Bluffs to Oneida (New York) | 1,039.32 mi (1,672.62 km) |
| Council Bluffs to Oneonta (New York) | 1,070.43 mi (1,722.69 km) |
| Council Bluffs to Ontario (California) | 1,285.50 mi (2,068.81 km) |
| Council Bluffs to Ontario (Oregon) | 1,087.85 mi (1,750.73 km) |
| Council Bluffs to Opa-locka (Florida) | 1,384.35 mi (2,227.89 km) |
| Council Bluffs to Opelika (Alabama) | 826.79 mi (1,330.60 km) |
| Council Bluffs to Opelousas (Louisiana) | 769.39 mi (1,238.21 km) |
| Council Bluffs to Orange (California) | 1,304.24 mi (2,098.97 km) |
| Council Bluffs to Orange (Texas) | 776.77 mi (1,250.09 km) |
| Council Bluffs to Orange City (Florida) | 1,180.16 mi (1,899.29 km) |
| Council Bluffs to Orangeburg (South Carolina) | 979.36 mi (1,576.12 km) |
