| Ronkonkoma to Candler-McAfee (Georgia) | 783.01 mi (1,260.13 km) |
| Ronkonkoma to Caño Martin Peña (Puerto Rico) | 1,601.71 mi (2,577.70 km) |
| Ronkonkoma to Cañon City (Colorado) | 1,706.31 mi (2,746.05 km) |
| Ronkonkoma to Canóvanas (Puerto Rico) | 1,608.18 mi (2,588.12 km) |
| Ronkonkoma to Canton (Georgia) | 769.06 mi (1,237.68 km) |
| Ronkonkoma to Canton (Illinois) | 885.11 mi (1,424.45 km) |
| Ronkonkoma to Canton (Mississippi) | 1,091.98 mi (1,757.37 km) |
| Ronkonkoma to Canton (Ohio) | 430.94 mi (693.53 km) |
| Ronkonkoma to Canyon (Texas) | 1,612.52 mi (2,595.10 km) |
| Ronkonkoma to Canyon Lake (California) | 2,450.34 mi (3,943.44 km) |
| Ronkonkoma to Canyon Lake (Texas) | 1,597.19 mi (2,570.42 km) |
| Ronkonkoma to Cape Coral (Florida) | 1,101.70 mi (1,773.01 km) |
| Ronkonkoma to Cape Girardeau (Missouri) | 912.65 mi (1,468.77 km) |
| Ronkonkoma to Carbondale (Illinois) | 885.75 mi (1,425.47 km) |
| Ronkonkoma to Carlisle (Pennsylvania) | 218.29 mi (351.30 km) |
