I don't either. If I fly, I usually fly SWA - because the customer service is good, and they don't make promises they can't keep. AA, on the other hand, usually leaves on time and touches down on time - and then I spend an hour or more staring at an unmanned or unprepated gate on the tarmac from inside the parked plane because AA's "on time" rating only measures "arrivals" as "landing times".
Otherwise, I use one of these. If I'm driving between Austin or Houston and Dallas, it's almost no contest. I can literally drop someone off at DFW airport (if they're flying AA) and meet them at the Houston airport just as they step out of the terminal. Been there, done that twice.
More comfortable than AA or SWA, too - but SWA is actually cheaper than driving. AA almost never is.
