| Oristano to Odessa (Texas) | 5,797.75 mi (9,330.58 km) |
| Oristano to Ogden (Utah) | 5,704.42 mi (9,180.38 km) |
| Oristano to Oildale (California) | 6,256.70 mi (10,069.19 km) |
| Oristano to Ojus (Florida) | 5,029.58 mi (8,094.33 km) |
| Oristano to Okemos (Michigan) | 4,565.29 mi (7,347.12 km) |
| Oristano to Oklahoma City (Oklahoma) | 5,425.59 mi (8,731.64 km) |
| Oristano to Okmulgee (Oklahoma) | 5,354.93 mi (8,617.93 km) |
| Oristano to Olathe (Kansas) | 5,159.89 mi (8,304.05 km) |
| Oristano to Old Jamestown (Missouri) | 4,970.08 mi (7,998.56 km) |
| Oristano to Oldsmar (Florida) | 5,066.96 mi (8,154.48 km) |
| Oristano to Olean (New York) | 4,328.33 mi (6,965.77 km) |
| Oristano to Olive Branch (Mississippi) | 5,114.08 mi (8,230.32 km) |
| Oristano to Olivehurst (California) | 6,137.34 mi (9,877.10 km) |
| Oristano to Olney (Maryland) | 4,370.64 mi (7,033.87 km) |
| Oristano to Olympia (Washington) | 5,729.43 mi (9,220.63 km) |
