| Oristano to Orangevale (California) | 6,148.61 mi (9,895.23 km) |
| Oristano to Orchards (Washington) | 5,795.46 mi (9,326.89 km) |
| Oristano to Orcutt (California) | 6,334.93 mi (10,195.09 km) |
| Oristano to Oregon (Ohio) | 4,562.81 mi (7,343.13 km) |
| Oristano to Oregon (Wisconsin) | 4,765.09 mi (7,668.68 km) |
| Oristano to Oregon City (Oregon) | 5,816.73 mi (9,361.12 km) |
| Oristano to Orem (Utah) | 5,742.93 mi (9,242.35 km) |
| Oristano to Orinda (California) | 6,224.24 mi (10,016.95 km) |
| Oristano to Orland Park (Illinois) | 4,754.05 mi (7,650.91 km) |
| Oristano to Orlando (Florida) | 4,984.25 mi (8,021.37 km) |
| Oristano to Ormond Beach (Florida) | 4,939.26 mi (7,948.98 km) |
| Oristano to Oro Valley (Arizona) | 6,121.75 mi (9,852.00 km) |
| Oristano to Oroville (California) | 6,114.03 mi (9,839.58 km) |
| Oristano to Oshkosh (Wisconsin) | 4,687.54 mi (7,543.86 km) |
| Oristano to Oskaloosa (Iowa) | 4,966.14 mi (7,992.22 km) |
