IndiGo placed a firm order for 100 Airbus A320-200 aircraft in June 2005 with plans to begin operations in mid-2006.

InterGlobe had a 51.12% stake in IndiGo and 47.88% was held by Gangwal's Virginia-based company Caelum Investments. IndiGo was founded in 2006 as a private company by Rahul Bhatia of InterGlobe Enterprises and Rakesh Gangwal. The company went public in November 2015. The airline became the largest Indian carrier by passenger market share in 2012. It took delivery of its first aircraft in July 2006 and commenced operations a month later. The airline was founded as a private company by Rahul Bhatia of InterGlobe Enterprises and Rakesh Gangwal in 2006. It has its primary hub at Indira Gandhi International Airport, Delhi.

The airline operated 1,500 daily flights as of 2019 to 96 destinations – 71 domestic and 25 international. It is also the largest individual Asian low-cost carrier in terms of jet fleet size and passengers carried, and the fourth largest carrier in Asia with over 6.4 crore (64 million) passengers carried in financial year 2018–19. It is the largest airline in India by passengers carried and fleet size, with a 53.5% domestic market share as of October 2021. InterGlobe Aviation Ltd., doing business as IndiGo, is an Indian low-cost airline headquartered in Gurgaon, Haryana, India. IndiGo uses an Indigo-sky blue livery, as seen on the airline's Airbus A320neo aircraft

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