(Way off topic): Southwest has stranded me for multiple days more than once, requiring me to book on another carrier in order to get home. Frontier hasn't. Yes, Southwest's overall cancellation numbers are better than Frontier's, but I've found specific city pairs have a huge bearing on your individual experience. And Southwest may have more flights to your destination than Frontier, but that doesn't really help much when they're all booked for days because of IROPS. I still fly Southwest. Obviously, YMMV.