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 encourage repeat business by providing incentives for travelers to choose a specific airline over others. Many airlines partner with hotels, car rental companies, and other travel services, allowing members to earn points even when not flying. Popular frequent flyer programs include those from major airlines like American Airlines, Delta Air Lines, and United Airlines. Members can also achieve elite status, which offers additional perks such as priority boarding and access to exclusive lounges.