Analyze and compare Alaska Air, Delta Air Lines, and Southwest Airlines

Alaska Air Group $($ALK$),$ Delta Air Lines $($DAL$),$ and Southwest Airlines $($LUV$)$ reported the following financial information $($in millions$)$ in a recent year:

Alaska Air Group Delta Air Lines Southwest Airlines

Sales

$\backslash$table$[[$$$8,781,$$$47,007,$$$22,428$