| Oristano to Oswego (Illinois) | 4,771.06 mi (7,678.28 km) |
| Oristano to Oswego (New York) | 4,196.39 mi (6,753.43 km) |
| Oristano to Otsego (Minnesota) | 4,838.60 mi (7,786.98 km) |
| Oristano to Ottawa (Illinois) | 4,804.81 mi (7,732.60 km) |
| Oristano to Ottawa (Kansas) | 5,190.81 mi (8,353.80 km) |
| Oristano to Ottumwa (Iowa) | 4,968.50 mi (7,996.03 km) |
| Oristano to Overland (Missouri) | 4,979.65 mi (8,013.98 km) |
| Oristano to Overland Park (Kansas) | 5,154.19 mi (8,294.87 km) |
| Oristano to Overlea (Maryland) | 4,337.49 mi (6,980.51 km) |
| Oristano to Oviedo (Florida) | 4,969.53 mi (7,997.69 km) |
| Oristano to Owasso (Oklahoma) | 5,317.25 mi (8,557.28 km) |
| Oristano to Owatonna (Minnesota) | 4,872.40 mi (7,841.36 km) |
| Oristano to Owensboro (Kentucky) | 4,876.60 mi (7,848.12 km) |
| Oristano to Owings Mills (Maryland) | 4,348.37 mi (6,998.03 km) |
| Oristano to Owosso (Michigan) | 4,544.30 mi (7,313.34 km) |
