Allegiant Airlines gift cards offer discounts on flights and are available through promotions or special sales. Purchases can be made online or at authorized retailers like Costco, Sam's Club, and third-party marketplaces like Groupon. Costco often offers discounts on Allegiant gift cards, providing more value for money. Customer service can assist with balance inquiries, redemption issues, or troubleshooting problems. To find the best deals, regularly check the official website and other trusted retailers. Signing up for the airline's email list also keeps you informed about exclusive deals and promotions.