| Boppard to Rockville (Maryland) | 4,006.78 mi (6,448.29 km) |
| Boppard to Rockville Centre (New York) | 3,793.97 mi (6,105.80 km) |
| Boppard to Rockwall (Texas) | 5,063.85 mi (8,149.49 km) |
| Boppard to Rocky Mount (North Carolina) | 4,177.44 mi (6,722.94 km) |
| Boppard to Rocky Point (New York) | 3,753.67 mi (6,040.95 km) |
| Boppard to Rocky River (Ohio) | 4,082.82 mi (6,570.66 km) |
| Boppard to Roessleville (New York) | 3,712.18 mi (5,974.18 km) |
| Boppard to Rogers (Arkansas) | 4,801.53 mi (7,727.31 km) |
| Boppard to Rogers (Minnesota) | 4,335.31 mi (6,977.01 km) |
| Boppard to Rohnert Park (California) | 5,612.36 mi (9,032.22 km) |
| Boppard to Rolla (Missouri) | 4,629.48 mi (7,450.43 km) |
| Boppard to Rolling Meadows (Illinois) | 4,287.72 mi (6,900.41 km) |
| Boppard to Roma (Texas) | 5,508.67 mi (8,865.35 km) |
| Boppard to Rome (Georgia) | 4,558.34 mi (7,335.93 km) |
| Boppard to Rome (New York) | 3,756.52 mi (6,045.53 km) |
