| Darby to Rosemont (California) | 2,440.92 mi (3,928.28 km) |
| Darby to Rosemount (Minnesota) | 966.16 mi (1,554.89 km) |
| Darby to Rosenberg (Texas) | 1,364.94 mi (2,196.66 km) |
| Darby to Roseville (California) | 2,434.59 mi (3,918.09 km) |
| Darby to Roseville (Michigan) | 436.93 mi (703.18 km) |
| Darby to Roseville (Minnesota) | 974.98 mi (1,569.07 km) |
| Darby to Rossmoor (California) | 2,381.71 mi (3,832.99 km) |
| Darby to Rossville (Maryland) | 75.51 mi (121.52 km) |
| Darby to Roswell (Georgia) | 645.07 mi (1,038.14 km) |
| Darby to Roswell (New Mexico) | 1,675.98 mi (2,697.22 km) |
| Darby to Round Lake (Illinois) | 688.35 mi (1,107.78 km) |
| Darby to Round Lake Beach (Illinois) | 687.52 mi (1,106.46 km) |
| Darby to Round Rock (Texas) | 1,415.78 mi (2,278.47 km) |
| Darby to Rowland Heights (California) | 2,366.81 mi (3,809.02 km) |
| Darby to Rowlett (Texas) | 1,274.71 mi (2,051.44 km) |
