Which airline loyalty program was the first to introduce the concept of 'miles' as a currency that could be earned and redeemed for free flights?

Loyalty programs have revolutionized how transportation companies retain customers. From frequent flyer miles to ride-sharing rewards, these programs have become sophisticated marketing tools that drive customer retention and increase lifetime value. This trivia question tests your knowledge about a significant milestone in transportation loyalty program history that changed how travelers think about brand loyalty.

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American Airlines AAdvantage (1981)
United Airlines Mileage Plus (1979)
Delta SkyMiles (1983)
British Airways Executive Club (1974)