| Ronkonkoma to Cullman (Alabama) | 878.80 mi (1,414.29 km) |
| Ronkonkoma to Culpeper (Virginia) | 305.36 mi (491.43 km) |
| Ronkonkoma to Culver City (California) | 2,500.47 mi (4,024.11 km) |
| Ronkonkoma to Cumberland (Maryland) | 307.61 mi (495.05 km) |
| Ronkonkoma to Cupertino (California) | 2,601.64 mi (4,186.94 km) |
| Ronkonkoma to Cutler Bay (Florida) | 1,130.64 mi (1,819.59 km) |
| Ronkonkoma to Cutlerville (Michigan) | 660.60 mi (1,063.14 km) |
| Ronkonkoma to Cuyahoga Falls (Ohio) | 438.46 mi (705.64 km) |
| Ronkonkoma to Cypress (California) | 2,487.18 mi (4,002.73 km) |
| Ronkonkoma to Cypress Gardens (Florida) | 1,008.87 mi (1,623.62 km) |
| Ronkonkoma to Cypress Lake (Florida) | 1,105.78 mi (1,779.58 km) |
| Ronkonkoma to D'Iberville (Mississippi) | 1,134.64 mi (1,826.03 km) |
| Ronkonkoma to Dakota Ridge (Colorado) | 1,681.56 mi (2,706.21 km) |
| Ronkonkoma to Dale City (Virginia) | 269.24 mi (433.31 km) |
| Ronkonkoma to Dallas (Georgia) | 799.18 mi (1,286.16 km) |
