| Rossmoor to Odenton (Maryland) | 2,309.40 mi (3,716.62 km) |
| Rossmoor to Odessa (Texas) | 922.06 mi (1,483.91 km) |
| Rossmoor to Ogden (Utah) | 613.14 mi (986.76 km) |
| Rossmoor to Oildale (California) | 125.58 mi (202.09 km) |
| Rossmoor to Ojus (Florida) | 2,321.66 mi (3,736.35 km) |
| Rossmoor to Okemos (Michigan) | 1,913.15 mi (3,078.92 km) |
| Rossmoor to Oklahoma City (Oklahoma) | 1,172.90 mi (1,887.60 km) |
| Rossmoor to Okmulgee (Oklahoma) | 1,257.53 mi (2,023.80 km) |
| Rossmoor to Olathe (Kansas) | 1,337.51 mi (2,152.51 km) |
| Rossmoor to Old Jamestown (Missouri) | 1,579.80 mi (2,542.45 km) |
| Rossmoor to Oldsmar (Florida) | 2,125.34 mi (3,420.40 km) |
| Rossmoor to Olean (New York) | 2,213.90 mi (3,562.92 km) |
| Rossmoor to Olive Branch (Mississippi) | 1,606.76 mi (2,585.84 km) |
| Rossmoor to Olivehurst (California) | 413.40 mi (665.31 km) |
| Rossmoor to Olney (Maryland) | 2,288.82 mi (3,683.50 km) |
