| Webster Groves to Rome (New York) | 838.25 mi (1,349.03 km) |
| Webster Groves to Romeoville (Illinois) | 241.77 mi (389.10 km) |
| Webster Groves to Romulus (Michigan) | 445.11 mi (716.34 km) |
| Webster Groves to Ronkonkoma (New York) | 927.16 mi (1,492.12 km) |
| Webster Groves to Roosevelt (New York) | 902.61 mi (1,452.60 km) |
| Webster Groves to Rosamond (California) | 1,558.02 mi (2,507.39 km) |
| Webster Groves to Rosaryville (Maryland) | 729.13 mi (1,173.42 km) |
| Webster Groves to Roscoe (Illinois) | 274.50 mi (441.77 km) |
| Webster Groves to Rose Hill (Virginia) | 713.89 mi (1,148.90 km) |
| Webster Groves to Roseburg (Oregon) | 1,740.95 mi (2,801.80 km) |
| Webster Groves to Rosedale (California) | 1,600.87 mi (2,576.35 km) |
| Webster Groves to Rosedale (Maryland) | 744.95 mi (1,198.88 km) |
| Webster Groves to Roselle (Illinois) | 263.21 mi (423.60 km) |
| Webster Groves to Roselle (New Jersey) | 867.12 mi (1,395.50 km) |
| Webster Groves to Roselle Park (New Jersey) | 866.84 mi (1,395.04 km) |
