| Ronkonkoma to Carrollwood (Florida) | 1,029.02 mi (1,656.05 km) |
| Ronkonkoma to Carson (California) | 2,497.94 mi (4,020.04 km) |
| Ronkonkoma to Carson City (Nevada) | 2,441.77 mi (3,929.65 km) |
| Ronkonkoma to Carteret (New Jersey) | 59.77 mi (96.19 km) |
| Ronkonkoma to Cartersville (Georgia) | 786.43 mi (1,265.63 km) |
| Ronkonkoma to Carthage (Missouri) | 1,163.16 mi (1,871.93 km) |
| Ronkonkoma to Cary (Illinois) | 787.55 mi (1,267.44 km) |
| Ronkonkoma to Cary (North Carolina) | 464.28 mi (747.19 km) |
| Ronkonkoma to Casa de Oro-Mount Helix (California) | 2,462.28 mi (3,962.66 km) |
| Ronkonkoma to Casa Grande (Arizona) | 2,185.73 mi (3,517.60 km) |
| Ronkonkoma to Casas Adobes (Arizona) | 2,163.67 mi (3,482.10 km) |
| Ronkonkoma to Cascades (Virginia) | 256.39 mi (412.63 km) |
| Ronkonkoma to Casper (Wyoming) | 1,703.95 mi (2,742.24 km) |
| Ronkonkoma to Casselberry (Florida) | 958.26 mi (1,542.17 km) |
| Ronkonkoma to Castaic (California) | 2,499.28 mi (4,022.20 km) |
