| Waltham to Carrollwood (Florida) | 1,174.55 mi (1,890.26 km) |
| Waltham to Carson (California) | 2,588.83 mi (4,166.32 km) |
| Waltham to Carson City (Nevada) | 2,513.45 mi (4,045.00 km) |
| Waltham to Carteret (New Jersey) | 198.53 mi (319.50 km) |
| Waltham to Cartersville (Georgia) | 927.43 mi (1,492.55 km) |
| Waltham to Carthage (Missouri) | 1,273.49 mi (2,049.49 km) |
| Waltham to Cary (Illinois) | 867.74 mi (1,396.50 km) |
| Waltham to Cary (North Carolina) | 610.65 mi (982.74 km) |
| Waltham to Casa de Oro-Mount Helix (California) | 2,557.94 mi (4,116.61 km) |
| Waltham to Casa Grande (Arizona) | 2,287.65 mi (3,681.61 km) |
| Waltham to Casas Adobes (Arizona) | 2,268.28 mi (3,650.45 km) |
| Waltham to Cascades (Virginia) | 395.93 mi (637.18 km) |
| Waltham to Casper (Wyoming) | 1,770.88 mi (2,849.96 km) |
| Waltham to Casselberry (Florida) | 1,102.97 mi (1,775.06 km) |
| Waltham to Castaic (California) | 2,587.76 mi (4,164.59 km) |
