| Cal to Ridgeland (Mississippi) | 6,206.23 mi (9,987.96 km) |
| Cal to Ridgewood (New Jersey) | 5,153.82 mi (8,294.27 km) |
| Cal to Rifle (Colorado) | 6,426.56 mi (10,342.55 km) |
| Cal to Rincon (Georgia) | 5,841.45 mi (9,400.90 km) |
| Cal to Ringwood (New Jersey) | 5,155.30 mi (8,296.65 km) |
| Cal to Río Grande (Puerto Rico) | 5,717.10 mi (9,200.79 km) |
| Cal to Rio Grande City (Texas) | 6,863.33 mi (11,045.46 km) |
| Cal to Rio Linda (California) | 6,818.38 mi (10,973.12 km) |
| Cal to Rio Rancho (New Mexico) | 6,641.24 mi (10,688.04 km) |
| Cal to Rio Rico (Arizona) | 6,994.51 mi (11,256.57 km) |
| Cal to Ripon (California) | 6,871.96 mi (11,059.35 km) |
| Cal to River Edge (New Jersey) | 5,153.07 mi (8,293.07 km) |
| Cal to River Falls (Wisconsin) | 5,665.37 mi (9,117.54 km) |
| Cal to River Forest (Illinois) | 5,646.73 mi (9,087.53 km) |
| Cal to River Grove (Illinois) | 5,645.97 mi (9,086.31 km) |
