Spirit Airlines bag check
Spirit and Frontier have size checks stationed at the check-in desk and boarding gates.
  • Ultra-low-cost carriers charge for everything except an unassigned seat and a small personal item.
  • Bag size and weight are strict, and paying for extra baggage at booking is cheaper than later.
  • Trying TikTok hacks to bring more than allowed is risky, and airlines are cracking down.

Ultra-low-cost carriers, or ULCCs, were a saving grace in college when I had limited fun money. I didn't care about the barebones planes or stuffing everything into a personal item so long as I could travel cheaply.

My limited budget meant I was careful to follow the rules to a T, as I knew the add-on fees would pile up if I got to the airport unprepared.