| Webster Groves to Reedley (California) | 1,591.99 mi (2,562.07 km) |
| Webster Groves to Reidsville (North Carolina) | 605.68 mi (974.75 km) |
| Webster Groves to Reisterstown (Maryland) | 728.63 mi (1,172.61 km) |
| Webster Groves to Rendon (Texas) | 566.90 mi (912.34 km) |
| Webster Groves to Reno (Nevada) | 1,576.47 mi (2,537.09 km) |
| Webster Groves to Renton (Washington) | 1,706.70 mi (2,746.67 km) |
| Webster Groves to Republic (Missouri) | 195.76 mi (315.05 km) |
| Webster Groves to Reston (Virginia) | 700.63 mi (1,127.55 km) |
| Webster Groves to Revere (Massachusetts) | 1,047.96 mi (1,686.52 km) |
| Webster Groves to Rexburg (Idaho) | 1,167.72 mi (1,879.26 km) |
| Webster Groves to Reynoldsburg (Ohio) | 415.20 mi (668.20 km) |
| Webster Groves to Rialto (California) | 1,529.92 mi (2,462.16 km) |
| Webster Groves to Richardson (Texas) | 526.40 mi (847.16 km) |
| Webster Groves to Richfield (Minnesota) | 459.98 mi (740.26 km) |
| Webster Groves to Richfield (Wisconsin) | 339.71 mi (546.71 km) |
