Seriously, spirit is like taking a bus. Either you have no experience or a bad one. It’s just to get somewhere cheap. Seats are bad, nickel and dime for everything, customer service is as barebones as it gets.
Spirit is a school Chromebook. It works, don’t ask much from it.
I on the other hand had the best experiences flying 10-12h flights with both delta and United.
United has served me the best foods out of us airlines (butter chicken, perfect food to let it sit in a warm tray, NOT PASTA everyone else. If someone from the food dept of flights reads this, stop it with the disgusting pasta on flights).
And delta has always been very easy for me, flight attendants are pleasant and any time I’ve been delayed they have automatically found me a flight without me having to actually call them out. The app is nice, WiFi works, seats are good. The main con is that their hub is Atlanta and that airport is a rats nest.