I find it interesting that the thread is titled Frontier vs. Spirit and yet the OP has an offer from United & Frontier…..

To the OP, if you do have an offer from Spirit as well, I would actually recommend Frontier over us. We’re further along in our growth than Frontier, so the quick upgrade chances I would say are better at F9 than NK. If the recent meltdown has you dissuaded, it was most certainly NOT the norm. We do have regular meltdowns, but that last one was the most epic one I’ve had during 3 CEOs….

Also, commuting SUCKS! If you have the opportunity to drive to work (especially if it’s a junior base) TAKE IT!