| Kennewick to Olympia Heights (Florida) | 2,554.06 mi (4,110.37 km) |
| Kennewick to Omaha (Nebraska) | 1,198.73 mi (1,929.18 km) |
| Kennewick to On Top of the World Designated Place (Florida) | 2,308.24 mi (3,714.75 km) |
| Kennewick to Onalaska (Wisconsin) | 1,367.39 mi (2,200.60 km) |
| Kennewick to Oneida (New York) | 2,123.10 mi (3,416.80 km) |
| Kennewick to Oneonta (New York) | 2,167.05 mi (3,487.53 km) |
| Kennewick to Ontario (California) | 844.09 mi (1,358.43 km) |
| Kennewick to Ontario (Oregon) | 184.37 mi (296.71 km) |
| Kennewick to Opa-locka (Florida) | 2,549.44 mi (4,102.93 km) |
| Kennewick to Opelika (Alabama) | 2,010.78 mi (3,236.03 km) |
| Kennewick to Opelousas (Louisiana) | 1,808.96 mi (2,911.24 km) |
| Kennewick to Orange (California) | 859.29 mi (1,382.89 km) |
| Kennewick to Orange (Texas) | 1,758.34 mi (2,829.77 km) |
| Kennewick to Orange City (Florida) | 2,361.56 mi (3,800.57 km) |
| Kennewick to Orangeburg (South Carolina) | 2,187.01 mi (3,519.66 km) |
