| Waltham to Central Point (Oregon) | 2,594.74 mi (4,175.83 km) |
| Waltham to Centralia (Illinois) | 975.19 mi (1,569.41 km) |
| Waltham to Centralia (Washington) | 2,518.05 mi (4,052.41 km) |
| Waltham to Centreville (Virginia) | 406.99 mi (654.98 km) |
| Waltham to Ceres (California) | 2,615.01 mi (4,208.46 km) |
| Waltham to Cerritos (California) | 2,578.32 mi (4,149.40 km) |
| Waltham to Chalco (Nebraska) | 1,280.59 mi (2,060.90 km) |
| Waltham to Chalmette (Louisiana) | 1,347.42 mi (2,168.47 km) |
| Waltham to Chambersburg (Pennsylvania) | 374.19 mi (602.20 km) |
| Waltham to Chamblee (Georgia) | 919.47 mi (1,479.75 km) |
| Waltham to Champaign (Illinois) | 896.97 mi (1,443.54 km) |
| Waltham to Champlin (Minnesota) | 1,117.79 mi (1,798.91 km) |
| Waltham to Chandler (Arizona) | 2,279.89 mi (3,669.12 km) |
| Waltham to Chanhassen (Minnesota) | 1,125.64 mi (1,811.54 km) |
| Waltham to Channahon (Illinois) | 876.17 mi (1,410.07 km) |
