| Can to Olympia Heights (Florida) | 5,929.08 mi (9,541.93 km) |
| Can to Omaha (Nebraska) | 5,782.73 mi (9,306.40 km) |
| Can to On Top of the World Designated Place (Florida) | 5,856.29 mi (9,424.79 km) |
| Can to Onalaska (Wisconsin) | 5,483.31 mi (8,824.53 km) |
| Can to Oneida (New York) | 4,944.76 mi (7,957.83 km) |
| Can to Oneonta (New York) | 4,947.39 mi (7,962.06 km) |
| Can to Ontario (California) | 6,844.73 mi (11,015.53 km) |
| Can to Ontario (Oregon) | 6,212.78 mi (9,998.51 km) |
| Can to Opa-locka (Florida) | 5,917.01 mi (9,522.50 km) |
| Can to Opelika (Alabama) | 5,817.17 mi (9,361.83 km) |
| Can to Opelousas (Louisiana) | 6,196.29 mi (9,971.96 km) |
| Can to Orange (California) | 6,864.81 mi (11,047.84 km) |
| Can to Orange (Texas) | 6,283.53 mi (10,112.36 km) |
| Can to Orange City (Florida) | 5,820.47 mi (9,367.13 km) |
| Can to Orangeburg (South Carolina) | 5,588.34 mi (8,993.56 km) |
