[thehappypm]

Yes. But this is super transparent on their site. You can get super cheap flights if you don’t care about checking bags, in-flight sodas, and so on.

[setr]

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

[OkayPhysicist]

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.

[mdhen]

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.

[wddkcs]

They allow you up to two personal items/small bags.