| Ronkonkoma to Cibolo (Texas) | 1,607.25 mi (2,586.62 km) |
| Ronkonkoma to Cicero (Illinois) | 761.83 mi (1,226.05 km) |
| Ronkonkoma to Cimarron Hills (Colorado) | 1,671.64 mi (2,690.24 km) |
| Ronkonkoma to Cincinnati (Ohio) | 613.02 mi (986.57 km) |
| Ronkonkoma to Cinco Ranch (Texas) | 1,481.55 mi (2,384.33 km) |
| Ronkonkoma to Circleville (Ohio) | 523.88 mi (843.11 km) |
| Ronkonkoma to Citrus (California) | 2,470.85 mi (3,976.44 km) |
| Ronkonkoma to Citrus Heights (California) | 2,530.30 mi (4,072.12 km) |
| Ronkonkoma to Citrus Park (Florida) | 1,029.50 mi (1,656.82 km) |
| Ronkonkoma to Claiborne (Louisiana) | 1,197.74 mi (1,927.58 km) |
| Ronkonkoma to Claremont (California) | 2,461.50 mi (3,961.40 km) |
| Ronkonkoma to Claremont (New Hampshire) | 182.46 mi (293.64 km) |
| Ronkonkoma to Claremore (Oklahoma) | 1,249.96 mi (2,011.61 km) |
| Ronkonkoma to Clarksburg (Maryland) | 244.77 mi (393.92 km) |
| Ronkonkoma to Clarksburg (West Virginia) | 394.80 mi (635.37 km) |
