| Waltham to Cordele (Georgia) | 995.47 mi (1,602.05 km) |
| Waltham to Corinth (Mississippi) | 1,061.32 mi (1,708.03 km) |
| Waltham to Corinth (Texas) | 1,540.44 mi (2,479.10 km) |
| Waltham to Cornelius (North Carolina) | 703.96 mi (1,132.92 km) |
| Waltham to Cornelius (Oregon) | 2,541.06 mi (4,089.44 km) |
| Waltham to Corning (New York) | 297.67 mi (479.05 km) |
| Waltham to Corona (California) | 2,552.84 mi (4,108.39 km) |
| Waltham to Coronado (California) | 2,571.00 mi (4,137.62 km) |
| Waltham to Corpus Christi (Texas) | 1,780.16 mi (2,864.88 km) |
| Waltham to Corsicana (Texas) | 1,551.35 mi (2,496.65 km) |
| Waltham to Cortland (New York) | 251.86 mi (405.33 km) |
| Waltham to Corvallis (Oregon) | 2,568.55 mi (4,133.69 km) |
| Waltham to Coshocton (Ohio) | 569.15 mi (915.96 km) |
| Waltham to Costa Mesa (California) | 2,576.81 mi (4,146.98 km) |
| Waltham to Coto de Caza (California) | 2,562.37 mi (4,123.74 km) |
