| Abbreviation | Definition |
|---|---|
| D14 | Fourteenth Coast Guard District |
| D17 | Seventeenth Coast Guard District |
| D2 | Second Coast Guard District |
| D5 | Fifth Coast Guard District |
| D7 | Seventh Coast Guard District |
| D8 | Eighth Coast Guard District |
| D9 | Ninth Coast Guard District |
| DA | Decision Altitude / Decision Height |
| DA | Descent Advisor |
| DAA | Dublin Airport Authority |
| DAB | Dial-A-Bus |
| DAC | Development Assistance Committee |
| DACS | Digital Aeronautical Chart Supplement |
| DAD | Dangerous Airports Database |
| DAD | Digital Auto Drive |
| DADH | Decision Altitude/Decision Height |
| DADSS | Driver Alcohol Detection System for Safety |
| DAIR | Direct Altitude and Identity Readout |
| DAL | Dallas Amtrak Station |
| DAL | Dallas Love Field |