American Airlines, Delta Air Lines, and United Airlines are the world's three largest carriers by flights (and various other measures). They always are. According to Cirium Diio data, the trio has over 15,000 daily movements (takeoffs/landings combined) in November .

Compared to last November, their collective offering has risen by a respectable 5%. An additional 739 daily round-trip services are available. On a simple percentage basis, United has expanded the most, with 6% more services. It has just inaugurated its first flight on a new international route .

American Vs. Delta Vs. United: The Top 10 Hubs

Only the country's ten busiest hubs are shown below. If they are not listed, they did not have a sufficient number of movements. With 1,647 daily takeoffs/landings, Delta's

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