| Casas Adobes to Orangevale (California) | 721.65 mi (1,161.38 km) |
| Casas Adobes to Orchards (Washington) | 1,107.77 mi (1,782.78 km) |
| Casas Adobes to Orcutt (California) | 568.73 mi (915.28 km) |
| Casas Adobes to Oregon (Ohio) | 1,643.08 mi (2,644.28 km) |
| Casas Adobes to Oregon (Wisconsin) | 1,384.57 mi (2,228.26 km) |
| Casas Adobes to Oregon City (Oregon) | 1,090.74 mi (1,755.37 km) |
| Casas Adobes to Orem (Utah) | 551.02 mi (886.78 km) |
| Casas Adobes to Orinda (California) | 737.34 mi (1,186.63 km) |
| Casas Adobes to Orland Park (Illinois) | 1,422.98 mi (2,290.07 km) |
| Casas Adobes to Orlando (Florida) | 1,782.50 mi (2,868.65 km) |
| Casas Adobes to Ormond Beach (Florida) | 1,781.36 mi (2,866.82 km) |
| Casas Adobes to Oro Valley (Arizona) | 5.79 mi (9.31 km) |
| Casas Adobes to Oroville (California) | 769.20 mi (1,237.91 km) |
| Casas Adobes to Oshkosh (Wisconsin) | 1,454.57 mi (2,340.91 km) |
| Casas Adobes to Oskaloosa (Iowa) | 1,185.79 mi (1,908.35 km) |
