| AA | American Airlines |
| ACS | AAdvantage Customer Service |
| AirPass | AirPass is a service geared towards frequent flyers who book last-minute fares. https://airpass.aa.com/ |
| Co-terminal | Clusters of airports in a geographic region that can be interchanged (LGA, JFK, EWR) (FLL, MIA) (SFO, SJC) (LAX, ONT, BUR, SNA) (HOU, IAH) |
| CK | Concierge Key is the highest elite level available. It is primarily invite-only and generally determined by annual spend on AA metal. It could also be granted for AirPass holders and travel managers. |
| EF | ExpertFlyer is a travel information service for frequent flyers and business travelers. It provides access to in-depth flight/travel research. It allows you to set alerts for things like award space or upgrades or specific seats. |
| EP | Executive Platinum |
| F / J / P / Y | Fare classes that represent cabins: First / Business / Premium Economy / Economy respectively |
| LP | Loyalty Points are how status progress is measured on American Airlines |
| MCE | Main Cabin Extra |
| MCT | Minimum Connection Time |
| MPG | Miles & Copay Upgrade |
| ORC | Original Routing Credit |
| PDB | Pre-departure beverage |
| SWU | System Wide Upgrade https://www.aa.com/i18n/aadvantage-program/miles/redeem/award-travel/systemwide-upgrades.jsp |