Allegiant Airlines is a low-cost airline that operates charter flights. This airline is one of the ninth-largest commercial airlines in the United States. Allegiant Travel has more than 4,000 employees with a market capitalization of more than USD 2.6 billion. The airline employees are very friendly and helpful. They are trained in customer service. You can book up to nine passengers per itinerary. For bookings of 10 or more people, multiple bookings are required to accommodate all travellers. When booking someone else's ticket on the website, please enter the information in the traveller's details section.