| Rossmoor to Orangeburg (South Carolina) | 2,128.80 mi (3,425.97 km) |
| Rossmoor to Orangevale (California) | 381.02 mi (613.19 km) |
| Rossmoor to Orchards (Washington) | 855.18 mi (1,376.29 km) |
| Rossmoor to Orcutt (California) | 153.06 mi (246.32 km) |
| Rossmoor to Oregon (Ohio) | 1,955.40 mi (3,146.92 km) |
| Rossmoor to Oregon (Wisconsin) | 1,667.48 mi (2,683.55 km) |
| Rossmoor to Oregon City (Oregon) | 833.27 mi (1,341.02 km) |
| Rossmoor to Orem (Utah) | 570.71 mi (918.46 km) |
| Rossmoor to Orinda (California) | 364.12 mi (586.00 km) |
| Rossmoor to Orland Park (Illinois) | 1,727.77 mi (2,780.58 km) |
| Rossmoor to Orlando (Florida) | 2,192.10 mi (3,527.85 km) |
| Rossmoor to Ormond Beach (Florida) | 2,187.73 mi (3,520.82 km) |
| Rossmoor to Oro Valley (Arizona) | 421.76 mi (678.76 km) |
| Rossmoor to Oroville (California) | 439.22 mi (706.85 km) |
| Rossmoor to Oshkosh (Wisconsin) | 1,725.35 mi (2,776.69 km) |
