Spirit Airlines. Ok actually I think I'm done with the airlines now fully.
Though their check in system on their website is horrible. It just randomly says if my confirmation number is right. Then if you finally can get checked in and print your boarding pass it will a lot of times not do anything. I have yet to ever receive my boarding pass in an email and you literally have to click print boarding pass on their site multiple times before it gives you something other than a blank page.
Their app is worse. From flat out not loading my fight details with no error message or literally seeing it throw a NullReferenceException, i have yet to ever print out my boarding pass from them without doing it at the airport.
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