| Webster Groves to Ridgefield Park (New Jersey) | 880.75 mi (1,417.43 km) |
| Webster Groves to Ridgeland (Mississippi) | 425.98 mi (685.55 km) |
| Webster Groves to Ridgewood (New Jersey) | 876.74 mi (1,410.98 km) |
| Webster Groves to Rifle (Colorado) | 935.32 mi (1,505.25 km) |
| Webster Groves to Rincon (Georgia) | 672.04 mi (1,081.54 km) |
| Webster Groves to Ringwood (New Jersey) | 869.22 mi (1,398.88 km) |
| Webster Groves to Río Grande (Puerto Rico) | 2,028.45 mi (3,264.47 km) |
| Webster Groves to Rio Grande City (Texas) | 976.00 mi (1,570.72 km) |
| Webster Groves to Rio Linda (California) | 1,669.64 mi (2,687.02 km) |
| Webster Groves to Rio Rancho (New Mexico) | 929.54 mi (1,495.95 km) |
| Webster Groves to Rio Rico (Arizona) | 1,262.27 mi (2,031.43 km) |
| Webster Groves to Ripon (California) | 1,665.09 mi (2,679.71 km) |
| Webster Groves to River Edge (New Jersey) | 880.23 mi (1,416.59 km) |
| Webster Groves to River Falls (Wisconsin) | 448.99 mi (722.58 km) |
| Webster Groves to River Forest (Illinois) | 264.79 mi (426.13 km) |
