InterGlobe Aviation is the operator of India's largest passenger airline with a market share of 39.9% as of February 2018. The company operates its flights under the IndiGo brand. IndiGo primarily operates in India's domestic air travel market as a low-cost carrier. It has a fleet of 160 aircraft including 32 new generation A320 NEOs and 5 ATRs. IndiGo currently operates flights connecting 50 destinations - 42 domestic and 8 international.InterGlobe Aviation was originally incorporated in Lucknow as InterGlobe Aviation Private Limited a private limited company under the Companies Act 1956 on January 13 2004 with the Registrar of Companies Uttar Pradesh and Uttaranchal at Kanpur. Pursuant to a special resolution of the shareholders of the Company on June 30 2006 the Company was converted into a public company and the name of the Company was changed to 'InterGlobe Aviation Limited' subsequent to which a fresh certificate of incorporation was issued by the Registrar of Companies National Capital Territory of Delhi and Haryana on August 11 2006.In June 2005 InterGlobe Aviation placed a landmark order of 100 A320 aircraft with Airbus. In July 2006 InterGlobe Aviation took delivery of its first aircraft. In August 2006 the company launched domestic operations. In April 2007 IndiGo crossed the one million passenger mark. In April 2009 the carrier crossed 10 million passenger mark. Also during the month the company took delivery of its 25th aircraft. In June 2011 InterGlobe Aviation placed another order of 180 A320neo aircraft with Airbus. In September 2011 IndiGo launched its international operations. Also during the month it became the largest domestic carrier in India by market share. In October 2011 InterGlobe Aviation took delivery of its 50th aircraft. In December 2012 IndiGo crossed the 50 million passenger mark. In February 2013 IndiGo took delivery of its 75th aircraft. In April 2014 IndiGo crossed the 75 million passenger mark. In November 2014 InterGlobe Aviation took delivery of 100th aircraft. In March 2015 IndiGo crossed the 100 million passenger mark. In August 2015 InterGlobe Aviation placed an order of 250 A320neo aircraft with Airbus.On 29 February 2016 InterGlobe Aviation announced that Airbus has confirmed that beginning with March 2016 it will deliver 24 fuel efficient A320neo aircraft to the company by March of 2017 as compared to the original plan to deliver 26 A320neos. The new A320neo powered by Pratt and Whitney's fuel efficient geared turbo fan engines will enable IndiGo to structurally reduce its cost of operations. Fuel continues to be the single largest element of its cost structure. This also marks the beginning of the next phase of growth for IndiGo and will enable it to make air transportation far more accessible for the people of India.On 15 September 2016 IndiGo and Travelport a leading travel commerce platform announced a strategic partnership which will see IndiGo distribute all of its fares and ancillary products to Travelport-connected customers worldwide. On 21 September 2017 InterGlobe Aviation allotted shares to qualified institutional investors under institutional placement programme at an issue price of Rs 1130 per share. The institutional placement programme was a combination of fresh issue of 2.23 crore shares and Offer for Sale of 1.11 crore shares by exiting shareholders of the company. On 13 and 14 December 2017 two promoter entities sold a combined 2.91% stake in InterGlobe Aviation via Offer for Sale through the stock exchange mechanism. On 21 December 2017 IndiGo announced the commencement of its ATR operations in Hyderabad. IndiGo in October 2017 had announced its plan to further strengthen its regional operations with over 90 new flight connections that include routes to and from Tirupati Rajahmundry Hyderabad Chennai Bengaluru Mangalore Madurai and Nagpur. On 21 December 2017 IndiGo announced that it had reached 200 million passenger mark. On 23 December 2017 InterGlobe Aviation announced that IndiGo on 22 December 2017 became the first Indian carrier to operate 1000 plus flights in a day. IndiGo also took the delivery of its 31st Airbus A-320 Neo aircraft on the same day to join its ever growing fleet making the first Indian carrier with 150 aircraft fleet.On 13 March 2018 InterGlobe Aviation clarified to the stock exchanges that the company is the process of grounding 9 A320neo aircraft due to an ongoing Pratt & Whitney engine issue. The company took the decision to ground 9 A320neo aircraft following a directive from the Directorate General of Civil Aviation. On 5 April 2018 InterGlobe Aviation indicated that it has opted out of the bidding for acquiring national carrier Air India. The Government of India (GoI) has initiated the process of selling its majority stake through privatizing Air India. InterGlobe Aviation President Aditya Ghosh said in a statement that the company was interested primarily in the acquisition of Air India's international operations and Air India Express. However that option is not available under GoI's current divestiture plans for Air India. InterGlobe Aviation also said that it does not have the capability to take the task of acquiring and successfully turning around all of Air India's airline operations. Earlier InterGlobe Aviation in a letter dated 28 June 2017 submitted to the Government of India said that the airline is interested in acquiring the international operations of Air India and Air India Express. Alternatively it said that it is equally interested in acquiring all of the airline operations of Air India and Air India Express.