| Ronkonkoma to Cordele (Georgia) | 849.78 mi (1,367.58 km) |
| Ronkonkoma to Corinth (Mississippi) | 929.99 mi (1,496.67 km) |
| Ronkonkoma to Corinth (Texas) | 1,417.97 mi (2,282.00 km) |
| Ronkonkoma to Cornelius (North Carolina) | 559.38 mi (900.23 km) |
| Ronkonkoma to Cornelius (Oregon) | 2,496.35 mi (4,017.49 km) |
| Ronkonkoma to Corning (New York) | 223.66 mi (359.94 km) |
| Ronkonkoma to Corona (California) | 2,461.17 mi (3,960.87 km) |
| Ronkonkoma to Coronado (California) | 2,475.29 mi (3,983.60 km) |
| Ronkonkoma to Corpus Christi (Texas) | 1,644.73 mi (2,646.94 km) |
| Ronkonkoma to Corsicana (Texas) | 1,424.59 mi (2,292.65 km) |
| Ronkonkoma to Cortland (New York) | 200.54 mi (322.74 km) |
| Ronkonkoma to Corvallis (Oregon) | 2,520.24 mi (4,055.93 km) |
| Ronkonkoma to Coshocton (Ohio) | 459.43 mi (739.38 km) |
| Ronkonkoma to Costa Mesa (California) | 2,484.99 mi (3,999.20 km) |
| Ronkonkoma to Coto de Caza (California) | 2,469.94 mi (3,974.98 km) |
