| Cerveteri to Olympia Heights (Florida) | 5,169.21 mi (8,319.04 km) |
| Cerveteri to Omaha (Nebraska) | 5,147.36 mi (8,283.88 km) |
| Cerveteri to On Top of the World Designated Place (Florida) | 5,112.16 mi (8,227.22 km) |
| Cerveteri to Onalaska (Wisconsin) | 4,842.51 mi (7,793.27 km) |
| Cerveteri to Oneida (New York) | 4,244.56 mi (6,830.95 km) |
| Cerveteri to Oneonta (New York) | 4,241.95 mi (6,826.77 km) |
| Cerveteri to Ontario (California) | 6,293.06 mi (10,127.70 km) |
| Cerveteri to Ontario (Oregon) | 5,709.43 mi (9,188.44 km) |
| Cerveteri to Opa-locka (Florida) | 5,157.45 mi (8,300.11 km) |
| Cerveteri to Opelika (Alabama) | 5,096.17 mi (8,201.49 km) |
| Cerveteri to Opelousas (Louisiana) | 5,489.72 mi (8,834.86 km) |
| Cerveteri to Orange (California) | 6,313.47 mi (10,160.55 km) |
| Cerveteri to Orange (Texas) | 5,581.74 mi (8,982.93 km) |
| Cerveteri to Orange City (Florida) | 5,073.06 mi (8,164.30 km) |
| Cerveteri to Orangeburg (South Carolina) | 4,856.95 mi (7,816.51 km) |
