| Waltham to Clarksdale (Mississippi) | 1,187.33 mi (1,910.82 km) |
| Waltham to Clarkston (Georgia) | 920.43 mi (1,481.29 km) |
| Waltham to Clarksville (Indiana) | 813.47 mi (1,309.16 km) |
| Waltham to Clarksville (Tennessee) | 946.00 mi (1,522.45 km) |
| Waltham to Clawson (Michigan) | 606.56 mi (976.16 km) |
| Waltham to Clay (Alabama) | 1,026.94 mi (1,652.70 km) |
| Waltham to Clayton (California) | 2,654.21 mi (4,271.53 km) |
| Waltham to Clayton (Missouri) | 1,033.00 mi (1,662.45 km) |
| Waltham to Clayton (North Carolina) | 604.40 mi (972.69 km) |
| Waltham to Clayton (Ohio) | 702.19 mi (1,130.07 km) |
| Waltham to Clearfield (Utah) | 2,083.88 mi (3,353.68 km) |
| Waltham to Clearlake (California) | 2,662.26 mi (4,284.49 km) |
| Waltham to Clearwater (Florida) | 1,186.77 mi (1,909.92 km) |
| Waltham to Cleburne (Texas) | 1,586.76 mi (2,553.65 km) |
| Waltham to Clemmons (North Carolina) | 656.97 mi (1,057.29 km) |
