So, is a 24-inch luggage a carry-on or not? Well, it's a bit of a gray area. Some airlines might consider it a carry-on, while others will gate-check it, which means you'll have to check it at the gate and pick it up at the baggage claim when you arrive. Don't risk it and check with your airline to be sure!
What Is Size Of Carry On Luggage For Delta at Bonnie Call blog
But, why do airlines have such strict rules about carry-on sizes? It's all about safety and comfort! They want to ensure that there's enough space in the overhead bins for everyone's luggage and that emergency exits are clear. Make sense, right?