| Oristano to Oakley (California) | 6,202.58 mi (9,982.09 km) |
| Oristano to Oakton (Virginia) | 4,390.43 mi (7,065.72 km) |
| Oristano to Oakville (Missouri) | 4,987.94 mi (8,027.32 km) |
| Oristano to Oatfield (Oregon) | 5,812.79 mi (9,354.79 km) |
| Oristano to Ocala (Florida) | 4,995.26 mi (8,039.09 km) |
| Oristano to Ocean Acres (New Jersey) | 4,221.31 mi (6,793.54 km) |
| Oristano to Ocean City (New Jersey) | 4,252.48 mi (6,843.71 km) |
| Oristano to Ocean Pines (Maryland) | 4,308.66 mi (6,934.11 km) |
| Oristano to Ocean Pointe (Hawaii) | 8,119.80 mi (13,067.55 km) |
| Oristano to Ocean Springs (Mississippi) | 5,259.91 mi (8,465.00 km) |
| Oristano to Oceanside (California) | 6,316.45 mi (10,165.35 km) |
| Oristano to Oceanside (New York) | 4,161.61 mi (6,697.46 km) |
| Oristano to Ocoee (Florida) | 4,989.66 mi (8,030.08 km) |
| Oristano to Oconomowoc (Wisconsin) | 4,721.24 mi (7,598.11 km) |
| Oristano to Odenton (Maryland) | 4,356.15 mi (7,010.54 km) |
