| UAL | United Airlines |
| ALGT | Allegiant Travel |
| ATSG | Air Transport Services Group |
| CPA | Copa |
| MESA | Mesa Air Group |
| AAL | American Airlines Group |
| SKYW | SkyWest |
| LUV | Southwest Airlines |
| ULCC | Frontier Group |
| SAVE | Spirit Airlines |
| JBLU | JetBlue Airways |
| DAL | Delta Air Lines |
| SNCY | Sun Country Airlines |