The data describes the U.S. domestic market share of leading airlines from June 2017 to May 2018. During this time period, American Airlines was the leading airline in the United States, with a domestic market share of 18.2 percent, followed closely by Southwest Airlines.
U.S. airlines' domestic market share
The passenger air transportation market is a thriving industry, taking individuals to locations around the globe. American Airlines was the biggest airline in the world based on sales, reaching 43 billion USD in sales revenue in 2017.
