| Webster Groves to Rockport (Texas) | 825.56 mi (1,328.61 km) |
| Webster Groves to Rockville (Maryland) | 710.59 mi (1,143.58 km) |
| Webster Groves to Rockville Centre (New York) | 899.68 mi (1,447.90 km) |
| Webster Groves to Rockwall (Texas) | 519.16 mi (835.50 km) |
| Webster Groves to Rocky Mount (North Carolina) | 712.67 mi (1,146.93 km) |
| Webster Groves to Rocky Point (New York) | 937.62 mi (1,508.95 km) |
| Webster Groves to Rocky River (Ohio) | 491.66 mi (791.26 km) |
| Webster Groves to Roessleville (New York) | 911.58 mi (1,467.05 km) |
| Webster Groves to Rogers (Arkansas) | 260.74 mi (419.62 km) |
| Webster Groves to Rogers (Minnesota) | 485.12 mi (780.72 km) |
| Webster Groves to Rohnert Park (California) | 1,740.55 mi (2,801.15 km) |
| Webster Groves to Rolla (Missouri) | 88.20 mi (141.95 km) |
| Webster Groves to Rolling Meadows (Illinois) | 270.40 mi (435.17 km) |
| Webster Groves to Roma (Texas) | 979.26 mi (1,575.97 km) |
| Webster Groves to Rome (Georgia) | 414.17 mi (666.54 km) |
