| Webster Groves to Robbinsdale (Minnesota) | 470.54 mi (757.26 km) |
| Webster Groves to Robertsville (New Jersey) | 864.00 mi (1,390.47 km) |
| Webster Groves to Robinson (Texas) | 623.84 mi (1,003.97 km) |
| Webster Groves to Robstown (Texas) | 856.54 mi (1,378.47 km) |
| Webster Groves to Rochester (Michigan) | 473.14 mi (761.44 km) |
| Webster Groves to Rochester (Minnesota) | 390.92 mi (629.12 km) |
| Webster Groves to Rochester (New Hampshire) | 1,059.49 mi (1,705.08 km) |
| Webster Groves to Rochester (New York) | 735.87 mi (1,184.27 km) |
| Webster Groves to Rochester Hills (Michigan) | 470.74 mi (757.59 km) |
| Webster Groves to Rock Hill (South Carolina) | 574.19 mi (924.06 km) |
| Webster Groves to Rock Island (Illinois) | 199.58 mi (321.20 km) |
| Webster Groves to Rock Springs (Wyoming) | 1,016.49 mi (1,635.88 km) |
| Webster Groves to Rockford (Illinois) | 262.69 mi (422.76 km) |
| Webster Groves to Rockledge (Florida) | 899.15 mi (1,447.04 km) |
| Webster Groves to Rocklin (California) | 1,658.03 mi (2,668.34 km) |
