Trust me I know about unreliable airlines (allegiant). I vowed to never fly allegiant again, its been over 6 years since I’ve flown with them. I have never (knock on wood lol) had issues with spirit or frontier. When I go to the next ut game, I will try to fly with the major airlines: delta, united, sw (they compensated me nicely for the ‘22
bowl debacle), or american.
My philosphy flying is to get a basic seat with no amenities. I am low maintenance when it comes to flying, regardless where I sit, we all get there the same time.