List of airlines of the United States

American Airlines
American Airlines, which merged with US Airways in 2013, retains the top spot of carriers based on passenger traffic. The Fort Worth, Texas-based carrier handled 209 million passengers with 2.2 million flights operated in 2017. American Airlines and American Eagle fly an average of 6,700 flights a day to nearly 350 destinations in more

Delta Airlines
Ten years after its merger with Northwest Airlines, Delta Air Lines carried 186.3 million passengers with 5400 daily departures. Delta and its Delta Connection carriers offer service to 306 destinations in 52 countries on six continents. The Atlanta-based carrier has more than 80,000 employees worldwide and operates a mainline fleet of more than 800 aircraft

Southwest Airlines
The granddaddy of low-cost airlines acquired AirTran Airways in 2011 and carried 130.2 million passengers with 3600 daily departures in 2017, up 4.4 percent from 2016. During peak travel seasons, Southwest operates more than 4,000-weekday departures among a network of 100 destinations in the U.S. and 10 countries.