| Ronkonkoma to Commerce (California) | 2,487.96 mi (4,003.98 km) |
| Ronkonkoma to Commerce City (Colorado) | 1,662.70 mi (2,675.85 km) |
| Ronkonkoma to Compton (California) | 2,494.85 mi (4,015.08 km) |
| Ronkonkoma to Comstock Park (Michigan) | 662.94 mi (1,066.89 km) |
| Ronkonkoma to Concord (California) | 2,583.46 mi (4,157.68 km) |
| Ronkonkoma to Concord (Missouri) | 928.66 mi (1,494.54 km) |
| Ronkonkoma to Concord (New Hampshire) | 185.92 mi (299.21 km) |
| Ronkonkoma to Concord (North Carolina) | 553.30 mi (890.46 km) |
| Ronkonkoma to Conneaut (Ohio) | 393.60 mi (633.44 km) |
| Ronkonkoma to Connersville (Indiana) | 638.26 mi (1,027.18 km) |
| Ronkonkoma to Conroe (Texas) | 1,444.09 mi (2,324.04 km) |
| Ronkonkoma to Converse (Texas) | 1,614.17 mi (2,597.76 km) |
| Ronkonkoma to Conway (Arkansas) | 1,123.02 mi (1,807.32 km) |
| Ronkonkoma to Conway (Florida) | 968.76 mi (1,559.06 km) |
| Ronkonkoma to Conway (South Carolina) | 580.39 mi (934.05 km) |
