| Waltham to Cloverleaf (Texas) | 1,586.00 mi (2,552.42 km) |
| Waltham to Cloverly (Maryland) | 377.02 mi (606.75 km) |
| Waltham to Clovis (California) | 2,571.81 mi (4,138.93 km) |
| Waltham to Clovis (New Mexico) | 1,802.62 mi (2,901.04 km) |
| Waltham to Clute (Texas) | 1,630.47 mi (2,623.99 km) |
| Waltham to Coachella (California) | 2,485.74 mi (4,000.42 km) |
| Waltham to Coalinga (California) | 2,623.85 mi (4,222.68 km) |
| Waltham to Coamo (Puerto Rico) | 1,704.12 mi (2,742.51 km) |
| Waltham to Coatesville (Pennsylvania) | 290.18 mi (467.00 km) |
| Waltham to Cockeysville (Maryland) | 345.50 mi (556.03 km) |
| Waltham to Cocoa (Florida) | 1,104.83 mi (1,778.06 km) |
| Waltham to Cocoa Beach (Florida) | 1,104.14 mi (1,776.94 km) |
| Waltham to Coconut Creek (Florida) | 1,222.59 mi (1,967.58 km) |
| Waltham to Coeur d'Alene (Idaho) | 2,220.87 mi (3,574.14 km) |
| Waltham to Cohoes (New York) | 128.20 mi (206.32 km) |
