| Placentia to Rosemont (California) | 376.82 mi (606.43 km) |
| Placentia to Rosemount (Minnesota) | 1,514.16 mi (2,436.80 km) |
| Placentia to Rosenberg (Texas) | 1,326.40 mi (2,134.64 km) |
| Placentia to Roseville (California) | 388.92 mi (625.91 km) |
| Placentia to Roseville (Michigan) | 1,971.75 mi (3,173.23 km) |
| Placentia to Roseville (Minnesota) | 1,516.95 mi (2,441.29 km) |
| Placentia to Rossmoor (California) | 14.39 mi (23.16 km) |
| Placentia to Rossville (Maryland) | 2,305.28 mi (3,710.00 km) |
| Placentia to Roswell (Georgia) | 1,911.35 mi (3,076.02 km) |
| Placentia to Roswell (New Mexico) | 766.92 mi (1,234.24 km) |
| Placentia to Round Lake (Illinois) | 1,709.15 mi (2,750.61 km) |
| Placentia to Round Lake Beach (Illinois) | 1,710.83 mi (2,753.31 km) |
| Placentia to Round Rock (Texas) | 1,200.90 mi (1,932.66 km) |
| Placentia to Rowland Heights (California) | 6.61 mi (10.64 km) |
| Placentia to Rowlett (Texas) | 1,228.64 mi (1,977.31 km) |
