All Allegiant passengers can take one carrier it on board free of charge. Bags that are 15 inches tall, 16 inches long, and 7 inches deep Each passenger can bring free personal items The maximum dimensions are 7 x 15 x 16 inches (17.8 x 38.1 x 40.6 cm). Bags that are 14 inches tall, 22 inches long, and 9 inches deep You can buy one handbag per passenger Carry-on baggage (such as roll onboard and clothing bags) should fit in the overhead compartment. The maximum size is 9 x 14 x 22 inches (22.9 x 35.6 x 55.9 cm). Additional charges apply for baggage over 40 pounds, sporting goods, or oversized excess baggage.