| Delaware to Conyers (Georgia) | 460.25 mi (740.70 km) |
| Delaware to Cookeville (Tennessee) | 314.92 mi (506.82 km) |
| Delaware to Coolidge (Arizona) | 1,649.31 mi (2,654.31 km) |
| Delaware to Coon Rapids (Minnesota) | 618.96 mi (996.12 km) |
| Delaware to Cooper City (Florida) | 996.78 mi (1,604.16 km) |
| Delaware to Coos Bay (Oregon) | 2,108.11 mi (3,392.68 km) |
| Delaware to Copiague (New York) | 509.28 mi (819.61 km) |
| Delaware to Coppell (Texas) | 920.96 mi (1,482.14 km) |
| Delaware to Copperas Cove (Texas) | 1,043.67 mi (1,679.63 km) |
| Delaware to Coral Gables (Florida) | 1,020.32 mi (1,642.05 km) |
| Delaware to Coral Springs (Florida) | 981.74 mi (1,579.95 km) |
| Delaware to Coral Terrace (Florida) | 1,017.10 mi (1,636.87 km) |
| Delaware to Coralville (Iowa) | 454.87 mi (732.04 km) |
| Delaware to Coram (New York) | 529.62 mi (852.35 km) |
| Delaware to Corcoran (California) | 1,988.50 mi (3,200.19 km) |
