| Altadena to Orangevale (California) | 354.77 mi (570.94 km) |
| Altadena to Orchards (Washington) | 827.40 mi (1,331.57 km) |
| Altadena to Orcutt (California) | 138.34 mi (222.64 km) |
| Altadena to Oregon (Ohio) | 1,945.95 mi (3,131.71 km) |
| Altadena to Oregon (Wisconsin) | 1,656.08 mi (2,665.20 km) |
| Altadena to Oregon City (Oregon) | 805.54 mi (1,296.39 km) |
| Altadena to Orem (Utah) | 550.32 mi (885.66 km) |
| Altadena to Orinda (California) | 340.50 mi (547.99 km) |
| Altadena to Orland Park (Illinois) | 1,718.01 mi (2,764.87 km) |
| Altadena to Orlando (Florida) | 2,195.12 mi (3,532.71 km) |
| Altadena to Ormond Beach (Florida) | 2,189.97 mi (3,524.42 km) |
| Altadena to Oro Valley (Arizona) | 430.96 mi (693.57 km) |
| Altadena to Oroville (California) | 412.71 mi (664.20 km) |
| Altadena to Oshkosh (Wisconsin) | 1,712.95 mi (2,756.73 km) |
| Altadena to Oskaloosa (Iowa) | 1,470.30 mi (2,366.22 km) |
