| Waltham to Clemson (South Carolina) | 819.89 mi (1,319.48 km) |
| Waltham to Clermont (Florida) | 1,122.37 mi (1,806.28 km) |
| Waltham to Cleveland (Mississippi) | 1,212.49 mi (1,951.32 km) |
| Waltham to Cleveland (Ohio) | 539.87 mi (868.84 km) |
| Waltham to Cleveland (Tennessee) | 885.24 mi (1,424.65 km) |
| Waltham to Cleveland Heights (Ohio) | 533.49 mi (858.58 km) |
| Waltham to Cliffside Park (New Jersey) | 178.42 mi (287.13 km) |
| Waltham to Clifton (Colorado) | 1,946.32 mi (3,132.29 km) |
| Waltham to Clifton (New Jersey) | 183.79 mi (295.78 km) |
| Waltham to Clinton (Iowa) | 972.44 mi (1,564.99 km) |
| Waltham to Clinton (Maryland) | 389.18 mi (626.33 km) |
| Waltham to Clinton (Mississippi) | 1,252.56 mi (2,015.80 km) |
| Waltham to Clinton (Utah) | 2,085.27 mi (3,355.92 km) |
| Waltham to Clive (Iowa) | 1,155.95 mi (1,860.33 km) |
| Waltham to Cloquet (Minnesota) | 1,084.42 mi (1,745.21 km) |
