

The capacity of Terminal 1 was estimated to be 71.5 lakh (7.15 million) passengers per annum (mppa). Significant growth in the Indian aviation industry led to a major increase in passenger traffic. Nevertheless, the company collapsed one month later. 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. 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. This was the first nonstop service between India and North America. In October 2001, Canada 3000 commenced a flight to Toronto using an Airbus A340. For this expansion work, GoAir and select flights of IndiGo were moved to Terminal 2 as well as select flights of SpiceJet and IndiGo to Terminal 3. The domestic arrivals terminal 1C was demolished and rebuilt into a brand-new domestic arrivals terminal. There is also a separate technical area for VIP passengers. The newly constructed domestic departures block 1D is now used by all domestic low-cost airlines ( IndiGo, and SpiceJet). Block 1C was also turned into a domestic arrivals terminal, and was rebuilt and opened on 24 February 2022. It is planned that they will be demolished after the construction of newer terminals. Block 1A and 1B later became dedicated terminals for domestic airlines and are currently closed down. Blocks 1A and 1B were used to handle international operations while domestic operations took place in Block 1C. The old domestic airport ( Palam) is known as Terminal 1 and was divided into separate buildings – 1A, 1B, and 1C. With the inauguration of this new international terminal, Terminal 2, on, the airport was renamed as Indira Gandhi International Airport (IGIA). Owing to an increase in air traffic in the 70s and the 80's, an additional terminal with nearly four times the area of the old Palam terminal was constructed. In 1979–80, a total of 30 lakh (3 million) domestic and international passengers flew into and out of Palam Airport. Palam Airport had a peak capacity of around 1,300 passengers per hour. To stimulate the increasing traffic, a second airport, Noida International Airport is being constructed to offset the load of Indira Gandhi International Airport. The former airport, which used to be the primary airport of NCR, Safdarjung Airport is now used mainly by VVIP helicopters and small charter helicopters due to its short runway. The other airport serving NCR is the Hindon Airport, which is much smaller in size and primarily handles regional flights out of the city under the UDAN Scheme. The airport uses an advanced system called Airport Collaborative Decision Making (A-CDM) to help keep takeoffs and landings timely and predictable. The airport inaugurated a 4,400 m (14,400 ft) runway and the 2.1 km (1.3 mi) Eastern Cross Taxiways (ECT) with dual parallel taxiways in July 2023. The Terminal 3 building has a capacity to handle 3.4 crore (34 million) passengers annually and was the world's 8th largest passenger terminal upon completion. With the commencement of operations at Terminal 3 in 2010, it became India's and South Asia's largest aviation hub. In September 2008, the airport inaugurated a 4,430 m (14,530 ft) runway. In May 2006, the management of the airport was passed over to Delhi International Airport Limited (DIAL), a consortium led by the GMR Group. The airport was operated by the Indian Air Force before its management was transferred to the Airports Authority of India. It is the second busiest airport in the world by seating capacity, having a seating capacity of over 36 lakh (3.6 million) seats, and the busiest airport in Asia by passenger traffic, handling over 3.7 crore (37 million) passengers in 2021. As of 2022, it is the seventh busiest airport in the world, as per the latest rankings issued by the UK-based air consultancy firm, OAG. In the financial year of 2020, the airport handled 6.73 crore (67.3 million) passengers, the highest ever in the airport's history. It is also the busiest airport in the country in terms of cargo traffic. Named after Indira Gandhi (1917–1984), the former Prime Minister of India, it is the busiest airport of India in terms of passenger traffic since 2009. The airport, spread over an area of 5,106 acres (2,066 ha), is situated in Palam, Delhi, 15 km (9.3 mi) southwest of the New Delhi Railway Station and 16 km (9.9 mi) from New Delhi city centre. Indira Gandhi International Airport ( IATA: DEL, ICAO: VIDP) is the primary international airport serving Delhi, the capital of India, and the National Capital Region (NCR).
