Passenger airlines are airlines dedicated to the transport of human passengers; they typically operate a fleet of passenger aircraft that may be either owned outright by an airline company or
. Passenger airlines can be mainline, with flights operated by the airline's central operating unit, or a regional airline that operates regionally over shorter non-intercontinental distances. Passenger airlines may also be low-cost carriers that provide basic and less expensive services. The charter airlines operate outside regular schedule intervals or major airlines with at least one billion U.S. dollars in revenue.
Largest airlines in the world
Global market size for the airline industry was estimated at 762.8 billion dollars in 2023. This was the biggest number registered after the coronavirus pandemic, but it was still smaller than the market size before the pandemic. The airline industry was one of the most affected industries worldwide, but companies have been improving their operations since then. By 2050, the market size is expected to grow more, since
air passenger traffic was forecast to surpass 10 billion.
Based on the brand value of 2024,
Delta Air Lines was the dominant player in the global passenger aviation market. The United States airlines dominated the list of top ten airlines. However, other big airlines like British Airways, Emirates, and China Southern Airlines also made it onto the list.
Delta Air Lines was the most punctual airline company in North America with an 83.2 percent on-time performance. Its counterpart in Europe, I
beria Express, a Spanish low-cost airline, ranked as the most punctual airline, with 89.9 percent operational punctuality.
Net Zero in Aviation
As of October 2022, the International Civil Aviation Organization (ICAO) agreed to achieve net-zero carbon emissions in the aviation industry by decreasing Co2 from flight operations and switching to sustainable aviation fuel (SAF.) By 2050,
the aviation industry is forecasted to need 450 billion liters of SAF to decarbonize the sector. Since 2013, United Airlines was by far
the leading SAF purchaser, with an off-take volume of more than 14 billion liters. Southwest Airlines was the second leading purchaser. However, the purchase gap between Delta and Southwest was approximately 10 billion liters.
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