| Webster Groves to Rowlett (Texas) | 523.35 mi (842.25 km) |
| Webster Groves to Roy (Utah) | 1,160.94 mi (1,868.35 km) |
| Webster Groves to Royal Kunia (Hawaii) | 4,127.10 mi (6,641.93 km) |
| Webster Groves to Royal Oak (Michigan) | 464.84 mi (748.09 km) |
| Webster Groves to Royal Palm Beach (Florida) | 1,009.15 mi (1,624.07 km) |
| Webster Groves to Royse City (Texas) | 511.59 mi (823.32 km) |
| Webster Groves to Ruskin (Florida) | 879.89 mi (1,416.05 km) |
| Webster Groves to Russellville (Alabama) | 317.39 mi (510.79 km) |
| Webster Groves to Russellville (Arkansas) | 275.57 mi (443.48 km) |
| Webster Groves to Ruston (Louisiana) | 437.46 mi (704.02 km) |
| Webster Groves to Rutherford (New Jersey) | 876.09 mi (1,409.93 km) |
| Webster Groves to Rutland (Vermont) | 966.71 mi (1,555.77 km) |
| Webster Groves to Sabana Grande (Puerto Rico) | 1,995.77 mi (3,211.87 km) |
| Webster Groves to Sachse (Texas) | 521.46 mi (839.21 km) |
| Webster Groves to Saco (Maine) | 1,088.17 mi (1,751.23 km) |
