Feels like a very specific anecdote. There is no reason Spirit planes won't smell or United planed always will.
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.
>Seriously, spirit is like taking a bus.
I thought to myself "ah, a decent airline then, not as bad as others in this comment section describe it", and only at your next sentence did I remember that in the US, public transit seems to suffer from really bad reputation (probably due to serious underfunding). You really need to get this sorted out, life's so much better with good public transport :)
(It's far from perfect in my country, and I'm often annoyed by it, but it seems to be nonexistent or only used by the truely desperate in many US cities, at least in the public perception)
As noted in my comment you want your flight experience to be of a higher grade then continue to enjoy to fly the more expensive airlines. Sounds like you can afford doing so and frequently so. Myself i like being cheap in terms of getting from point A to point B .. have more money to spend on hotel room and or overall more trips in a year. I'm not rich and extremely happy to fly with other middle class people and frequently so!
Also I just happens to be looking at flights and the difference between Sprit and American is minimal. Add a carryon to Spirit and it might be over the American flight.