| Ronkonkoma to Central Point (Oregon) | 2,537.76 mi (4,084.12 km) |
| Ronkonkoma to Centralia (Illinois) | 864.14 mi (1,390.70 km) |
| Ronkonkoma to Centralia (Washington) | 2,478.17 mi (3,988.22 km) |
| Ronkonkoma to Centreville (Virginia) | 266.12 mi (428.27 km) |
| Ronkonkoma to Ceres (California) | 2,539.19 mi (4,086.43 km) |
| Ronkonkoma to Cerritos (California) | 2,487.29 mi (4,002.90 km) |
| Ronkonkoma to Chalco (Nebraska) | 1,196.81 mi (1,926.08 km) |
| Ronkonkoma to Chalmette (Louisiana) | 1,205.94 mi (1,940.78 km) |
| Ronkonkoma to Chambersburg (Pennsylvania) | 245.99 mi (395.88 km) |
| Ronkonkoma to Chamblee (Georgia) | 777.01 mi (1,250.48 km) |
| Ronkonkoma to Champaign (Illinois) | 796.83 mi (1,282.38 km) |
| Ronkonkoma to Champlin (Minnesota) | 1,064.53 mi (1,713.19 km) |
| Ronkonkoma to Chandler (Arizona) | 2,179.25 mi (3,507.16 km) |
| Ronkonkoma to Chanhassen (Minnesota) | 1,069.55 mi (1,721.28 km) |
| Ronkonkoma to Channahon (Illinois) | 788.04 mi (1,268.22 km) |
