Which transportation company pioneered the first modern frequent flyer program, creating a customer loyalty model that would be widely adopted across the industry?

In the highly competitive transportation industry, customer loyalty can make or break a company's success. Airlines, rideshare services, train operators, and car manufacturers all invest heavily in loyalty programs to retain customers. This poll tests your knowledge of one groundbreaking loyalty initiative that revolutionized how transportation companies approach customer retention and significantly influenced loyalty programs across the entire sector.

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