| Sassari to Olympia Heights (Florida) | 5,027.46 mi (8,090.92 km) |
| Sassari to Omaha (Nebraska) | 5,067.72 mi (8,155.71 km) |
| Sassari to On Top of the World Designated Place (Florida) | 4,980.64 mi (8,015.57 km) |
| Sassari to Onalaska (Wisconsin) | 4,761.93 mi (7,663.59 km) |
| Sassari to Oneida (New York) | 4,139.45 mi (6,661.80 km) |
| Sassari to Oneonta (New York) | 4,134.21 mi (6,653.37 km) |
| Sassari to Ontario (California) | 6,239.64 mi (10,041.73 km) |
| Sassari to Ontario (Oregon) | 5,675.35 mi (9,133.60 km) |
| Sassari to Opa-locka (Florida) | 5,015.95 mi (8,072.39 km) |
| Sassari to Opelika (Alabama) | 4,977.64 mi (8,010.74 km) |
| Sassari to Opelousas (Louisiana) | 5,377.38 mi (8,654.05 km) |
| Sassari to Orange (California) | 6,260.07 mi (10,074.61 km) |
| Sassari to Orange (Texas) | 5,471.42 mi (8,805.40 km) |
| Sassari to Orange City (Florida) | 4,939.64 mi (7,949.58 km) |
| Sassari to Orangeburg (South Carolina) | 4,733.44 mi (7,617.74 km) |
