The commercial airline industry is a global network of airline companies that provide customers with seats on their flights in exchange for money, "miles," or "points." The global industry's publicly traded companies have a market cap of roughly $400B, with the top three US airlines by market cap being Delta (valued at roughly $47.9B), United (about $32.2B), and Southwest (about $20.1B) as of May 8, 2026.
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However, not all of those passengers generate revenue for the airlines they purchase their tickets from. One business class traveler typically pays for five to six economy travelers. That's partly because airlines measure profit by the square foot, and although a business class seat is usually roughly 30% roomier than economy seats, the business class traveler usually pays about three times as much as someone sitting in economy.
No-frills airlines, like Frontier and Spirit, are popular for providing customers with a much cheaper alternative to flying. However, many budget airlines rely on baggage charges and extra fees, which can sometimes make it just as expensive as flying on a mainstream airline.
As of November 2024, Delta Airlines controlled roughly 17.8% of US airline market share, while American Airlines controlled about 17.5%, and Southwest controlled about 17.3%. Spirit Airlines, which would go on to shutter operations in 2026, controlled less than 5% of US airline industry market share at the time.
After World War II, airlines competed for their high-end passengers by offering cocktails, meals, and plush seats, cultivating the image of the elite "Jet Set." By the 1960s, air transport was completely changing global trade and offering big profits to companies able to ship via plane.
Some airlines, like American Airlines (which started the first airline loyalty program), have loyalty programs with higher valuations than the airline itself. The confusing business model of the modern commercial airline industry, including said loyalty programs, began after the 1978 Airline Deregulation Act in the US, which removed federal control over airline fares, routes, and market entry.
A consumer loophole known as "skiplagging" is a travel hack where travelers purchase a cheaper flight with a layover in their destination city. The hack works when flights to other cities with layovers at your destination are cheaper than direct flights to your destination. Airlines don't like the practice, but there's no specific law forbidding it.
Business History hosts Jacob Goldstein and Robert Smith explore how a carrier with just four airplanes shuttling across Texas revolutionized flying by offering free whiskey, cheap late-night tickets, and free-for-all seating allocation, despite how hard it is to make money running an airline. However, the success story didn't last forever.
Many travelers have shared their attachment to the documents as their utility fades. This sharply illustrated timeline reviews the development of the paper boarding pass as technology evolved.
Some experts suggest airlines lose money on every flight. This video dives into how airlines have leveraged their loyalty programs to make billions of dollars, effectively evolving into banks.
After World War II, the US dominated aviation, particularly Boeing. To compete, Europe's major industrial nations pooled resources to form Airbus, a customer-centric airplane manufacturer. Its A320 family of planes became the most popular in airliner history, leading to profitability in the 1990s. Amid Boeing's major hurdles in recent years, Airbus remains the industry leader.
The United States is home to more than 33 million businesses, the vast majority of which are small businesses, with millions being created (and others closing shop) every year. These businesses often rely on loans, provide the goods and services that keep the economy flowing, and sometimes even grow large enough to enter public markets or provide private investment opportunities. Explore key topics central to business and finance, from the role of the Federal Reserve to how initial public offerings work, how millions of American students finance higher education, and more.