| Ronkonkoma to Des Plaines (Illinois) | 769.32 mi (1,238.11 km) |
| Ronkonkoma to Desert Hot Springs (California) | 2,405.14 mi (3,870.69 km) |
| Ronkonkoma to DeSoto (Texas) | 1,426.13 mi (2,295.14 km) |
| Ronkonkoma to Destin (Florida) | 1,036.60 mi (1,668.25 km) |
| Ronkonkoma to Destrehan (Louisiana) | 1,222.72 mi (1,967.78 km) |
| Ronkonkoma to Detroit (Michigan) | 526.67 mi (847.60 km) |
| Ronkonkoma to Diamond Bar (California) | 2,470.35 mi (3,975.65 km) |
| Ronkonkoma to Diamond Springs (California) | 2,507.47 mi (4,035.38 km) |
| Ronkonkoma to Dickinson (North Dakota) | 1,526.75 mi (2,457.07 km) |
| Ronkonkoma to Dickinson (Texas) | 1,460.26 mi (2,350.06 km) |
| Ronkonkoma to Dickson (Tennessee) | 836.21 mi (1,345.74 km) |
| Ronkonkoma to Difficult Run (Virginia) | 259.64 mi (417.85 km) |
| Ronkonkoma to Dinuba (California) | 2,484.40 mi (3,998.26 km) |
| Ronkonkoma to Discovery Bay (California) | 2,564.42 mi (4,127.04 km) |
| Ronkonkoma to Dix Hills (New York) | 11.13 mi (17.92 km) |
