| Omaha to Olympia (Washington) | 1,381.54 mi (2,223.37 km) |
| Omaha to Olympia Heights (Florida) | 1,399.73 mi (2,252.65 km) |
| Omaha to On Top of the World Designated Place (Florida) | 1,141.59 mi (1,837.21 km) |
| Omaha to Onalaska (Wisconsin) | 306.00 mi (492.45 km) |
| Omaha to Oneida (New York) | 1,049.05 mi (1,688.29 km) |
| Omaha to Oneonta (New York) | 1,080.33 mi (1,738.62 km) |
| Omaha to Ontario (California) | 1,275.93 mi (2,053.41 km) |
| Omaha to Ontario (Oregon) | 1,077.34 mi (1,733.80 km) |
| Omaha to Opa-locka (Florida) | 1,393.01 mi (2,241.84 km) |
| Omaha to Opelika (Alabama) | 835.74 mi (1,345.00 km) |
| Omaha to Opelousas (Louisiana) | 774.23 mi (1,246.00 km) |
| Omaha to Orange (California) | 1,294.70 mi (2,083.62 km) |
| Omaha to Orange (Texas) | 780.29 mi (1,255.76 km) |
| Omaha to Orange City (Florida) | 1,189.20 mi (1,913.83 km) |
| Omaha to Orangeburg (South Carolina) | 989.42 mi (1,592.32 km) |
