| Ronkonkoma to Conyers (Georgia) | 774.17 mi (1,245.90 km) |
| Ronkonkoma to Cookeville (Tennessee) | 742.27 mi (1,194.56 km) |
| Ronkonkoma to Coolidge (Arizona) | 2,172.47 mi (3,496.25 km) |
| Ronkonkoma to Coon Rapids (Minnesota) | 1,060.70 mi (1,707.03 km) |
| Ronkonkoma to Cooper City (Florida) | 1,099.07 mi (1,768.79 km) |
| Ronkonkoma to Coos Bay (Oregon) | 2,585.21 mi (4,160.50 km) |
| Ronkonkoma to Copiague (New York) | 16.75 mi (26.96 km) |
| Ronkonkoma to Coppell (Texas) | 1,420.04 mi (2,285.34 km) |
| Ronkonkoma to Copperas Cove (Texas) | 1,532.13 mi (2,465.72 km) |
| Ronkonkoma to Coral Gables (Florida) | 1,121.02 mi (1,804.10 km) |
| Ronkonkoma to Coral Springs (Florida) | 1,083.98 mi (1,744.49 km) |
| Ronkonkoma to Coral Terrace (Florida) | 1,118.94 mi (1,800.77 km) |
| Ronkonkoma to Coralville (Iowa) | 959.70 mi (1,544.49 km) |
| Ronkonkoma to Coram (New York) | 8.20 mi (13.19 km) |
| Ronkonkoma to Corcoran (California) | 2,504.56 mi (4,030.70 km) |
