American Airlines vs United Airlines

American Airlines was assembled through the consolidation of 82 small US regional carriers in the late 1920s and early 1930s, with the holding company that became American Airlines incorporating in 1930. The carrier's first CEO of consequence was C.R. Smith — a businessman from Texas who transformed American from a mail carrier into the country's first truly commercial airline. Smith pioneered the DC-3 as a passenger aircraft (convincing Douglas to extend the DC-2 into the DC-3 specifically for American's sleeper service), created the first frequent flyer card (the AAdvantage programme in 1981), and introduced the Sabre computerised reservations system in the 1960s — which later became the most important airline booking system in the world.

The Airline Deregulation Act of 1978 ended government control of airline routes and fares. American Airlines responded more aggressively than any competitor: under CEO Robert Crandall, the airline pioneered the modern hub-and-spoke model, built Dallas/Fort Worth into a dominant connecting hub, and launched the AAdvantage frequent flyer programme — the first in airline history — in 1981. Crandall also used the Sabre reservation system as a competitive weapon, designing it to list American flights preferentially. The Department of Justice eventually forced changes to the system's display rules, but by then American had achieved enormous distribution advantages.

American Airlines filed for Chapter 11 bankruptcy in November 2011, the last major US carrier to do so. The bankruptcy allowed American to restructure its labor costs and pension obligations significantly. During the bankruptcy process, American merged with US Airways in 2013 — creating what was, at the time, the world's largest airline by passengers and available seat miles. The combined airline retained the American Airlines brand and AAdvantage programme, which had grown to over 115 million members and was valued at tens of billions of dollars independently.

American entered the COVID-19 pandemic carrying more debt than any other US airline, having borrowed heavily to fund aircraft orders and shareholder returns. Government CARES Act funding and additional borrowing allowed the airline to survive the pandemic, but emerged with a debt load exceeding $40 billion. The combination of high leverage, higher fuel costs, and a sales team that had missed the premium cabin pivot its competitors made earlier created a gap between American's revenue performance and Delta's and United's that the airline struggled to close.

American reported $54.6 billion in revenue for 2024. The airline operated the world's largest commercial aircraft fleet — approximately 900+ mainline jets — and carried more passengers domestically than any other US carrier. Its market capitalisation of approximately $10.5 billion was dramatically lower than Delta's ($36 billion) or United's ($22 billion), reflecting the market's concern about its debt load rather than its operational scale. A new commercial strategy launched in 2024 attempted to recapture corporate travel customers and restore the AAdvantage programme's competitive standing after strategy missteps earlier in the decade.

United Airlines traces its lineage to Varney Air Lines, founded by Walter Varney in 1926 as one of the first airmail contractors in the United States. The modern United was assembled through a series of mergers in the 1930s that brought together Boeing Air Transport, Pacific Air Transport, Varney Air Lines, and National Air Transport — all under the ownership of a holding company that would eventually become United. The airline's early history was intertwined with the development of the American airmail system and the federal government's decision about which carriers would carry the mail, which was a matter of survival for early commercial aviation.

United employees attempted to acquire the airline through an Employee Stock Ownership Plan in 1994 — one of the largest employee buyouts in corporate history. The deal was structured so that employees took wage concessions in exchange for equity stakes, with a board that included union representatives. The experiment in employee ownership lasted until the aftermath of the September 11 attacks devastated airline revenues, leading United to file for Chapter 11 bankruptcy in December 2002 — the largest airline bankruptcy in history at the time. The airline emerged from bankruptcy in 2006.

United merged with Continental Airlines in 2010, creating what was then the world's largest airline. The merger brought United dominant hubs in Chicago O'Hare, Houston Intercontinental, Newark, Los Angeles, San Francisco, Denver, and Washington Dulles — a US network unmatched by any competitor for hub coverage and international connectivity. Continental's particularly strong transoceanic routes — to Latin America, Europe, and Asia — combined with United's existing Pacific network to create the most geographically comprehensive airline in the world.

CEO Scott Kirby, who took the role in 2020, repositioned United around a "United Next" strategy that invested heavily in premium cabin products, expanded the Boeing 787 and 777 wide-body fleet for long-haul routes, and targeted affluent transatlantic and transpacific travellers who had historically preferred Delta or the European carriers. The strategy generated significant revenue per available seat mile improvements. United's premium cabin revenue grew substantially, and the airline's international routes — particularly transatlantic — became its most profitable segment.

United reported $59.1 billion in revenue for 2024. The airline operated more transatlantic and transpacific flights than any other carrier in the world, connecting North America to more European and Asian destinations than competitors. Its fleet of Boeing 787 Dreamliners — the world's largest 787 fleet — gave it particular range efficiency on thin long-haul routes. The airline that had filed for bankruptcy twice had transformed itself into the world's most geographically connected carrier.