| Waltham to Conyers (Georgia) | 917.51 mi (1,476.59 km) |
| Waltham to Cookeville (Tennessee) | 874.94 mi (1,408.08 km) |
| Waltham to Coolidge (Arizona) | 2,274.60 mi (3,660.61 km) |
| Waltham to Coon Rapids (Minnesota) | 1,113.87 mi (1,792.59 km) |
| Waltham to Cooper City (Florida) | 1,239.95 mi (1,995.51 km) |
| Waltham to Coos Bay (Oregon) | 2,637.39 mi (4,244.47 km) |
| Waltham to Copiague (New York) | 162.65 mi (261.76 km) |
| Waltham to Coppell (Texas) | 1,543.23 mi (2,483.59 km) |
| Waltham to Copperas Cove (Texas) | 1,659.29 mi (2,670.37 km) |
| Waltham to Coral Gables (Florida) | 1,261.57 mi (2,030.30 km) |
| Waltham to Coral Springs (Florida) | 1,225.00 mi (1,971.44 km) |
| Waltham to Coral Terrace (Florida) | 1,259.60 mi (2,027.14 km) |
| Waltham to Coralville (Iowa) | 1,042.99 mi (1,678.53 km) |
| Waltham to Coram (New York) | 138.36 mi (222.67 km) |
| Waltham to Corcoran (California) | 2,586.90 mi (4,163.22 km) |
