Which transportation company's loyalty program was the first to introduce the concept of 'miles' as a currency that could be earned and redeemed across multiple partner businesses?

Airlines and other transportation companies have revolutionized customer retention through sophisticated loyalty programs. These programs not only encourage repeat business but have evolved into complex ecosystems with partnerships across multiple industries. Test your knowledge about these innovative customer loyalty systems that have transformed how people travel and make transportation choices. Do you know which program made history with its groundbreaking approach?

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American Airlines' AAdvantage (1981)
United Airlines' Mileage Plus (1983)
British Airways' Executive Club (1988)
Japan Airlines' Mileage Bank (1983)