| Oro Valley to Odenton (Maryland) | 1,964.18 mi (3,161.05 km) |
| Oro Valley to Odessa (Texas) | 506.19 mi (814.64 km) |
| Oro Valley to Ogden (Utah) | 610.96 mi (983.25 km) |
| Oro Valley to Oildale (California) | 506.15 mi (814.57 km) |
| Oro Valley to Ojus (Florida) | 1,904.57 mi (3,065.10 km) |
| Oro Valley to Okemos (Michigan) | 1,609.80 mi (2,590.73 km) |
| Oro Valley to Oklahoma City (Oklahoma) | 799.14 mi (1,286.09 km) |
| Oro Valley to Okmulgee (Oklahoma) | 884.24 mi (1,423.05 km) |
| Oro Valley to Olathe (Kansas) | 1,009.01 mi (1,623.85 km) |
| Oro Valley to Old Jamestown (Missouri) | 1,240.32 mi (1,996.10 km) |
| Oro Valley to Oldsmar (Florida) | 1,711.33 mi (2,754.12 km) |
| Oro Valley to Olean (New York) | 1,896.39 mi (3,051.94 km) |
| Oro Valley to Olive Branch (Mississippi) | 1,224.99 mi (1,971.43 km) |
| Oro Valley to Olivehurst (California) | 749.85 mi (1,206.76 km) |
| Oro Valley to Olney (Maryland) | 1,944.25 mi (3,128.97 km) |
