Allegiant Customer Care is available 24 hours a day, 7 days a week. The primary priority of Allegiant Airlines' customer support has always been to provide our customers with world-class service 24 hours a day, seven days a week, transcending time and space. By calling Allegiant Airlines Customer Service at +1(702)765-4833, you agree to obtain details about refunds, flight bookings, appointments, and tour packages. Baggage allowances, ticket cancellations, cargo, and other similar issues. Call our US-based call center to book your Allegiant Airlines flights and get exciting deals and discounts on all of our big routes.