| Boppard to Clarkston (Georgia) | 4,542.81 mi (7,310.95 km) |
| Boppard to Clarksville (Indiana) | 4,382.91 mi (7,053.61 km) |
| Boppard to Clarksville (Tennessee) | 4,529.60 mi (7,289.68 km) |
| Boppard to Clawson (Michigan) | 4,083.39 mi (6,571.58 km) |
| Boppard to Clay (Alabama) | 4,643.39 mi (7,472.82 km) |
| Boppard to Clayton (California) | 5,616.13 mi (9,038.28 km) |
| Boppard to Clayton (Missouri) | 4,541.02 mi (7,308.07 km) |
| Boppard to Clayton (North Carolina) | 4,218.48 mi (6,789.00 km) |
| Boppard to Clayton (Ohio) | 4,253.24 mi (6,844.93 km) |
| Boppard to Clearfield (Utah) | 5,147.97 mi (8,284.85 km) |
| Boppard to Clearlake (California) | 5,573.97 mi (8,970.44 km) |
| Boppard to Clearwater (Florida) | 4,772.72 mi (7,680.95 km) |
| Boppard to Cleburne (Texas) | 5,130.12 mi (8,256.13 km) |
| Boppard to Clemmons (North Carolina) | 4,279.62 mi (6,887.38 km) |
| Boppard to Clemson (South Carolina) | 4,442.58 mi (7,149.64 km) |
