American Airlines is one of the world's largest and most recognized airlines, with origins dating back to the 1920s when a group of small airlines merged under the Aviation Corporation (AVCO). Officially established as American Airlines in 1934, it evolved from a mail carrier into a major passenger airline under the leadership of C.R. Smith, who played a critical role in shaping the airline's early success[1][2][5]. A key milestone in American Airlines' history was the development and introduction of the Douglas DC-3 aircraft in 1936. This plane revolutionized commercial aviation by enabling profitable passenger-only routes, independent of mail contracts. American Airlines was the first to operate the DC-3, which set new standards for comfort and efficiency in air travel[2][3][5]. Throughout its history, American Airlines has expanded through strategic mergers, including notable acquisitions such as Trans World Airlines in 2001 and US Airways in 2013, which helped it become the world's largest airline by fleet size and passenger traffic[4][6]. The airline was also a pioneer in technology, becoming the first to offer electronic ticketing across its 44-country network in 1998[3]. American Airlines operates a vast domestic and international route network, serving hundreds of destinations globally. Its innovations include the establishment of the Admirals Club for premium passengers and continuous investments in modern fleet technology and customer service improvements[3][8]. Today, American Airlines remains a leader in the aviation industry, known for its extensive network, technological advancements, and commitment to innovation. It plays a vital role in global air travel and continues to influence the evolution of the airline business through operational efficiency and customer experience enhancements[8][9].