| Oro Valley to Oswego (Illinois) | 1,396.94 mi (2,248.15 km) |
| Oro Valley to Oswego (New York) | 2,009.64 mi (3,234.20 km) |
| Oro Valley to Otsego (Minnesota) | 1,283.23 mi (2,065.15 km) |
| Oro Valley to Ottawa (Illinois) | 1,365.46 mi (2,197.50 km) |
| Oro Valley to Ottawa (Kansas) | 979.64 mi (1,576.58 km) |
| Oro Valley to Ottumwa (Iowa) | 1,183.52 mi (1,904.69 km) |
| Oro Valley to Overland (Missouri) | 1,233.47 mi (1,985.07 km) |
| Oro Valley to Overland Park (Kansas) | 1,015.77 mi (1,634.73 km) |
| Oro Valley to Overlea (Maryland) | 1,974.69 mi (3,177.96 km) |
| Oro Valley to Oviedo (Florida) | 1,785.85 mi (2,874.04 km) |
| Oro Valley to Owasso (Oklahoma) | 903.15 mi (1,453.47 km) |
| Oro Valley to Owatonna (Minnesota) | 1,251.04 mi (2,013.36 km) |
| Oro Valley to Owensboro (Kentucky) | 1,394.10 mi (2,243.59 km) |
| Oro Valley to Owings Mills (Maryland) | 1,960.29 mi (3,154.78 km) |
| Oro Valley to Owosso (Michigan) | 1,627.31 mi (2,618.91 km) |
