👉 The airline fluid, also known as the airline's frequent flyer program, is a loyalty scheme designed to reward and incentivize frequent travelers. It allows members to earn points or miles for every flight they take, which can then be redeemed for various benefits such as upgrades, free flights, or exclusive services. These programs are typically tiered, with higher tiers offering more perks based on the number of miles accumulated. Airlines use the airline fluid to foster customer loyalty, encourage repeat business, and gather valuable data on passenger preferences and travel patterns.