Earlier quoted context omitted.
To add credence to that statement… LAX to LAS is a $20 flight one-way through spirit. It’s cheaper to fly a family of four than drive. It’s wild how cheap spirit becomes on certain routes, especially short hops where you can trivially get away with nothing extra
For Spirit, a carry-on is considered an extra. That's an extra $35 right there, which brings it pretty much inline with Southwest's pricing.
Get a big backpack, i got a tom bihn synik 30 that qualifies as a personal item. Let's me carry enough for any short trip without having to use a carry on.