| Ronkonkoma to Dixon (California) | 2,563.33 mi (4,125.28 km) |
| Ronkonkoma to Dixon (Illinois) | 850.37 mi (1,368.53 km) |
| Ronkonkoma to Dobbs Ferry (New York) | 41.50 mi (66.79 km) |
| Ronkonkoma to Doctor Phillips (Florida) | 976.16 mi (1,570.98 km) |
| Ronkonkoma to Dodge City (Kansas) | 1,447.76 mi (2,329.95 km) |
| Ronkonkoma to Dolton (Illinois) | 753.50 mi (1,212.64 km) |
| Ronkonkoma to Donna (Texas) | 1,747.54 mi (2,812.39 km) |
| Ronkonkoma to Dorado (Puerto Rico) | 1,595.97 mi (2,568.47 km) |
| Ronkonkoma to Doral (Florida) | 1,115.57 mi (1,795.34 km) |
| Ronkonkoma to Doraville (Georgia) | 774.68 mi (1,246.73 km) |
| Ronkonkoma to Dothan (Alabama) | 951.26 mi (1,530.91 km) |
| Ronkonkoma to Douglas (Arizona) | 2,118.17 mi (3,408.87 km) |
| Ronkonkoma to Douglas (Georgia) | 839.85 mi (1,351.61 km) |
| Ronkonkoma to Douglasville (Georgia) | 801.15 mi (1,289.32 km) |
| Ronkonkoma to Dover (Delaware) | 170.19 mi (273.89 km) |
