| Cervia to Olympia Heights (Florida) | 5,125.49 mi (8,248.68 km) |
| Cervia to Omaha (Nebraska) | 5,052.54 mi (8,131.28 km) |
| Cervia to On Top of the World Designated Place (Florida) | 5,058.47 mi (8,140.83 km) |
| Cervia to Onalaska (Wisconsin) | 4,748.75 mi (7,642.37 km) |
| Cervia to Oneida (New York) | 4,169.59 mi (6,710.30 km) |
| Cervia to Oneonta (New York) | 4,169.08 mi (6,709.49 km) |
| Cervia to Ontario (California) | 6,180.89 mi (9,947.18 km) |
| Cervia to Ontario (Oregon) | 5,587.72 mi (8,992.57 km) |
| Cervia to Opa-locka (Florida) | 5,113.50 mi (8,229.39 km) |
| Cervia to Opelika (Alabama) | 5,030.83 mi (8,096.33 km) |
| Cervia to Opelousas (Louisiana) | 5,418.61 mi (8,720.41 km) |
| Cervia to Orange (California) | 6,201.27 mi (9,979.97 km) |
| Cervia to Orange (Texas) | 5,508.84 mi (8,865.62 km) |
| Cervia to Orange City (Florida) | 5,021.25 mi (8,080.92 km) |
| Cervia to Orangeburg (South Carolina) | 4,796.34 mi (7,718.96 km) |
