| Ronkonkoma to Cadillac (Michigan) | 668.81 mi (1,076.35 km) |
| Ronkonkoma to Caguas (Puerto Rico) | 1,615.25 mi (2,599.50 km) |
| Ronkonkoma to Cahokia (Illinois) | 918.41 mi (1,478.04 km) |
| Ronkonkoma to Calabasas (California) | 2,510.91 mi (4,040.92 km) |
| Ronkonkoma to Caldwell (Idaho) | 2,210.49 mi (3,557.44 km) |
| Ronkonkoma to Caledonia (Wisconsin) | 771.15 mi (1,241.05 km) |
| Ronkonkoma to Calera (Alabama) | 918.47 mi (1,478.13 km) |
| Ronkonkoma to Calexico (California) | 2,387.56 mi (3,842.41 km) |
| Ronkonkoma to Calhoun (Georgia) | 778.60 mi (1,253.04 km) |
| Ronkonkoma to California (Maryland) | 249.44 mi (401.43 km) |
| Ronkonkoma to California City (California) | 2,441.22 mi (3,928.76 km) |
| Ronkonkoma to Callaway (Florida) | 1,014.18 mi (1,632.17 km) |
| Ronkonkoma to Calumet City (Illinois) | 751.06 mi (1,208.72 km) |
| Ronkonkoma to Calverton (Maryland) | 235.77 mi (379.44 km) |
| Ronkonkoma to Camano (Washington) | 2,441.12 mi (3,928.61 km) |
