[3][10] As of 2024, it is the tenth-busiest airport in the world, as per the latest rankings issued by the UK-based air consultancy firm, OAG.

[6] In 1979–80, a total of 30 lakh (3 million) domestic and international passengers flew into and out of Palam Airport.

[25] Russia's decision to open its airspace after the Cold War allowed the airline to save time by flying a direct route over the Arctic.

[26] Even though the 11 September attacks had precipitated a global decline in air travel, Canada 3000 was hoping that the service would help it improve its financial position.

[28] Significant growth in the Indian aviation industry led to a major increase in passenger traffic.

In June 2022, Delhi International Airport became India's first to run entirely on Hydro Power and solar energy.

[36] Nine years later, in May 2015, Malaysia Airports chose to exit from DIAL venture and sold its entire 10% stake to majority shareholder GMR Infra for $79 million.

Since then some domestic airlines have trained their pilots to operate under CAT-II conditions of a minimum 350 m (1,150 ft) visibility.

The initially proposed mode involving simultaneous takeoffs in westerly flow to increase handling traffic capacity caused several near misses over the west side of the airport where the centrelines of runways 10/28 and 9/27 intersect.

[41] The runway use was changed to segregate dependent mode on 25 December 2007, which was a few days after a near miss involving an Airbus A330-200 of Qatar Airways and an IndiGo A320 aircraft.

The reason for the long threshold displacement is due to the presence of a 263 m high Shiv statue, which is located near runway 29L.

The Indian carriers operating international flights are Air India, IndiGo, and SpiceJet.

All international airlines shifted their operations to the new terminal in late July 2010 and all full service domestic carriers in November 2010.

[60] Air India Express, although a low cost airline, also operates its domestic flights from this terminal.

The terminal caters to support the movement and processing of passengers flying through chartered flights or private jets from the airport.

Ltd., which is a joint venture between Delhi International Airport Private Ltd (DIAL) and the Turkish company Celebi Ground Handling (CGH).

[64] Once the entire project is completed, these two new terminals will have an annual handling capacity of 12.5 lakh (1.25 million) tonnes.

It had to be refurbished after a fire gutted the interiors in October 1996[68] and DIAL significantly upgraded the terminal.

[69] DIAL had earlier planned to use the terminal for Haj operations as well as for charter planes; however, it never materialised.

In September 2024, DIAL issued tenders for an elevated cum at-grade Automated People Mover (APM) system to be completed by the end of 2027.

This line will be the first APM at an Indian airport and is proposed to be implemented on a design, build, finance, operate and transfer (DBFOT) model.

[223] Bijwasan railway station, immediately to the west of IGI on the Delhi–Jaipur line, is being upgraded to a major world-class regional multimodal transport hub.

[225] Haryana Orbital Rail Corridor (HORC) connects to the Delhi–Jaipur line at Patli railway station few kilometres south of Bijwasan.

[226][227] The airport, which lies in south Delhi near the border with Haryana state, is connected to Delhi in the north and Gurgaon in Haryana in the south by two expressways, both of which have eight lanes, the older and busier 27.7 km long at-grade Delhi–Gurgaon Expressway NH 48 (part of Delhi-Jaipur National Highway) which runs through Gurgaon and the newer 26.7 km long elevated Dwarka Expressway NH-248BB which passes west of Gurgaon.

[228] The Dwarka Expressway begins and ends at NH-48 DELHI-Jaipur acting as a western bypass to Gurgaon.

It begins immediately east of IGI airport at Shiv Murti and terminates in Haryana near Kherki Daula Toll Plaza, south of Gurgaon, near Western Peripheral Expressway (WPE).

Urban Extension Road-II, a 75.7 km-long six-lane expressway, connects the IGI airport to the south, southwest and western suburbs of Delhi as well as to the Delhi-Hisar NH-9.

Air conditioned low-floor buses operated by Delhi Transport Corporation (DTC) regularly run between the airport and the city.

[59] DIAL submitted a plan in 2016 to the then aviation secretary R N Choubey regarding the expansion of the airport with a new fourth runway and Terminal 4 in a phased manner.

[245] This article incorporates public domain material from the Air Force Historical Research Agency Media related to Indira Gandhi International Airport at Wikimedia Commons