Allegiant Air is an American low-cost airline that operates scheduled and charter flights. The airline was founded in 1997 and is headquartered in Las Vegas, Nevada. Allegiant Air primarily serves leisure travelers, offering flights to popular vacation destinations throughout the United States. The airline operates a fleet of primarily Airbus aircraft and has a reputation for offering affordable fares and a no-frills flying experience. However, passengers can choose to add on extras such as seat selection, priority boarding, and in-flight entertainment for an additional fee.