| Webster Groves to Rosemead (California) | 1,568.42 mi (2,524.12 km) |
| Webster Groves to Rosemont (California) | 1,666.68 mi (2,682.26 km) |
| Webster Groves to Rosemount (Minnesota) | 447.96 mi (720.93 km) |
| Webster Groves to Rosenberg (Texas) | 698.32 mi (1,123.84 km) |
| Webster Groves to Roseville (California) | 1,662.20 mi (2,675.05 km) |
| Webster Groves to Roseville (Michigan) | 474.10 mi (762.99 km) |
| Webster Groves to Roseville (Minnesota) | 466.94 mi (751.47 km) |
| Webster Groves to Rossmoor (California) | 1,574.88 mi (2,534.53 km) |
| Webster Groves to Rossville (Maryland) | 746.63 mi (1,201.58 km) |
| Webster Groves to Roswell (Georgia) | 458.52 mi (737.91 km) |
| Webster Groves to Roswell (New Mexico) | 869.29 mi (1,398.99 km) |
| Webster Groves to Round Lake (Illinois) | 285.19 mi (458.97 km) |
| Webster Groves to Round Lake Beach (Illinois) | 287.96 mi (463.42 km) |
| Webster Groves to Round Rock (Texas) | 694.51 mi (1,117.70 km) |
| Webster Groves to Rowland Heights (California) | 1,560.37 mi (2,511.18 km) |
