Which airline created the first modern frequent flyer program that revolutionized customer retention in transportation?

The transportation industry has seen some revolutionary marketing campaigns that changed how companies attract and retain customers. From iconic airline loyalty programs to rideshare app referral strategies, marketing innovation has driven customer acquisition in this competitive sector. Test your knowledge about a famous marketing partnership that transformed customer retention in the transportation industry!

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American Airlines (with AAdvantage in 1981)
Delta Air Lines (with SkyMiles in 1979)
United Airlines (with Mileage Plus in 1980)
Pan American World Airways (with WorldPass in 1978)