So, how do you know if your 24 inch luggage is too big or too small? The answer is, it depends on the size of the plane. If you're flying on a small plane, like a regional jet, your 24 inch luggage might be too big. But if you're flying on a big plane, like a Boeing 777, you might be able to squeeze it in.
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The best way to find out is to check the airline's website for their carry on size restrictions. You can usually find it in the faqs section, or you can call them and ask. And if you're still unsure, you can always try to measure your bag against the carry on sizing chart.
In conclusion, the answer to the question, is 24 inch luggage a carry on, is a definite maybe. It depends on the airline, the size of the plane, and the mood of the flight attendants. But don't worry, with a little planning and preparation, you can make sure your 24 inch luggage gets to your destination safely and securely.