| Placentia to Rockville (Maryland) | 2,270.28 mi (3,653.67 km) |
| Placentia to Rockville Centre (New York) | 2,449.53 mi (3,942.14 km) |
| Placentia to Rockwall (Texas) | 1,235.02 mi (1,987.57 km) |
| Placentia to Rocky Mount (North Carolina) | 2,257.59 mi (3,633.24 km) |
| Placentia to Rocky Point (New York) | 2,485.03 mi (3,999.28 km) |
| Placentia to Rocky River (Ohio) | 2,021.62 mi (3,253.48 km) |
| Placentia to Roessleville (New York) | 2,436.49 mi (3,921.16 km) |
| Placentia to Rogers (Arkansas) | 1,346.99 mi (2,167.77 km) |
| Placentia to Rogers (Minnesota) | 1,502.33 mi (2,417.77 km) |
| Placentia to Rohnert Park (California) | 410.09 mi (659.98 km) |
| Placentia to Rolla (Missouri) | 1,481.90 mi (2,384.89 km) |
| Placentia to Rolling Meadows (Illinois) | 1,710.06 mi (2,752.08 km) |
| Placentia to Roma (Texas) | 1,236.01 mi (1,989.16 km) |
| Placentia to Rome (Georgia) | 1,861.75 mi (2,996.20 km) |
| Placentia to Rome (New York) | 2,351.11 mi (3,783.74 km) |
