| Abbreviation | Definition |
|---|---|
| BA | British Airways |
| BAA | Bad Attitude Airport |
| BAA | British Airports Authority |
| BAAE | British Airways Avionic Engineering |
| BAAP | Black Aviation Airline Pioneers |
| BACTS | Bangor Area Comprehensive Transportation System |
| BACTS | Barrie Accessible Community Transportation Service |
| BACTS | Barrie Accessible Community Transportation Services |
| BAF | Bunker Adjustment Factor |
| BAGS | Baggage Airline Guest Services |
| BAIID | Breath Alcohol Ignition Interlock Device |
| BAL | Baltimore Penn Amtrak Station |
| BAM | Break Away Mode |
| BARA | Board of Airline Representatives of Australia |
| BARSA | Board of Airline Representatives South Africa |
| BART | Bay Area Rapid Transportation |
| BARV | Beach Armoured Recovery Vehicle |
| BASA | Bilateral Aviation Safety Agreement |
| BAT | Bayesian Automated Taxi |
| BAT | Beam Approach Training |