Allegiant Air has stringent regulations regarding carry-on luggage dimensions. The dimensions of a typical carry on luggage size allegiant , including wheels and handles, cannot be greater than 22 x 14 x 9 inches. The bag must meet this size criterion in order to fit comfortably in Allegiant's aircraft's overhead bin. Travelers should carefully measure their baggage to avoid additional taxes or having to check them at the gate because Allegiant's carry-on size is a little more limited than some big airlines that permit greater dimensions.
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