| Rossmoor to Oskaloosa (Iowa) | 1,480.41 mi (2,382.49 km) |
| Rossmoor to Oswego (Illinois) | 1,704.29 mi (2,742.79 km) |
| Rossmoor to Oswego (New York) | 2,315.31 mi (3,726.13 km) |
| Rossmoor to Otsego (Minnesota) | 1,516.66 mi (2,440.82 km) |
| Rossmoor to Ottawa (Illinois) | 1,675.84 mi (2,697.01 km) |
| Rossmoor to Ottawa (Kansas) | 1,311.15 mi (2,110.09 km) |
| Rossmoor to Ottumwa (Iowa) | 1,487.86 mi (2,394.48 km) |
| Rossmoor to Overland (Missouri) | 1,574.59 mi (2,534.06 km) |
| Rossmoor to Overland Park (Kansas) | 1,344.63 mi (2,163.97 km) |
| Rossmoor to Overlea (Maryland) | 2,317.43 mi (3,729.54 km) |
| Rossmoor to Oviedo (Florida) | 2,196.67 mi (3,535.19 km) |
| Rossmoor to Owasso (Oklahoma) | 1,267.61 mi (2,040.01 km) |
| Rossmoor to Owatonna (Minnesota) | 1,504.88 mi (2,421.87 km) |
| Rossmoor to Owensboro (Kentucky) | 1,749.12 mi (2,814.93 km) |
| Rossmoor to Owings Mills (Maryland) | 2,302.63 mi (3,705.73 km) |
