Airline frequent flyer programs are loyalty programs offered by airlines to reward customers for their travel. Members earn points or miles for each flight they take, which can be redeemed for free flights, upgrades, or other travel-related benefits. These programs often have different tiers, allowing frequent travelers to access additional perks as they accumulate more points. Participants can also earn points through partnerships with hotels, car rental services, and credit card companies. This flexibility encourages customers to choose specific airlines, like Delta or American Airlines, to maximize their rewards and enhance their travel experience.