American Airlines is marking its centennial on April 15, recalling a first flight in 1926 when a Douglas DH-4 biplane carried mail between Chicago and St. Louis under Robertson Aircraft Corporation, one of the companies that would later form the airline.

The current company emerged in 1930 from the consolidation of dozens of small carriers operating under the American Airways name. At the time, the U.S. aviation sector was largely built around mail contracts, and the network that became American linked cities across the Northeast, Midwest and Southwest.

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In 1934, the business was reorganized and renamed American Air Lines under the leadership of C.R. Smith, who would later help introduce the Douglas DC-3 into service in 1936, a step that made passenger air travel more viable on a large scale.

DH-4 biplane
DH-4 biplane | American Airlines

Over the following decades, the airline expanded through both organic growth and acquisitions, incorporating operators such as Trans Caribbean Airways in 1971, Air California in 1987, Reno Air in 1999, Trans World Airlines (TWA) in 2001 and US Airways in 2013. Those deals helped shape the carrier into one of the largest airline groups globally, with a network centered on major hubs including Dallas/Fort Worth, Charlotte, Chicago O’Hare and Miami.

The company’s development mirrors key phases of commercial aviation, from early propeller aircraft to the jet age with models such as the Boeing 707, and later the adoption of hub-and-spoke networks that redefined route planning in the United States. 

Today, American Airlines operates one of the largest fleets in the world, with more than 900 mainline aircraft supplemented by several hundred regional jets flown by its affiliates.

The carrier relies heavily on narrowbodies such as the Boeing 737 family and Airbus A320 series for domestic and short-haul routes, while widebodies including the Boeing 777 and 787 support long-haul operations across the Atlantic and Pacific, linking its major hubs to a global network spanning the Americas, Europe, Asia and Oceania.

American Airlines aircraft in Dallas-Fort Worth Airport
American Airlines aircraft in Dallas-Fort Worth Airport | Formulanone

To mark the anniversary, the airline is staging events across several U.S. airports and operating select flights with special liveries tied to the centennial, including a service numbered 1926 between Chicago and St. Louis, referencing the original route flown a century ago.