Spirit has been mostly fine but you should price in the cost of eventually getting stranded by them in the flight cost. I've flown them at least a dozen times a

Spirit has been mostly fine but you should price in the cost of eventually getting stranded by them in the flight cost. I've flown them at least a dozen times and been stranded once where the next flight would be 4 days later so I had to suck it up and buy a flight back on Southwest.