Southwest Airlines was established in 1967 and is the premier low-cost air carrier in the U.S. It has a fleet of 579 airplanes and flies between 89 destinations as of 2013. It has the credit of being the highest used airline by U.S. citizens for domestic flights.
It operates nearly 3,400 flights each day. In 2012 it had yearly revenue of $17 billion and currently has more than 45,000 employees. It is one of the most loved airlines in the U.S. because of its low cost, safety and customer care oriented service.