Irkutsk International Airport (Russian: Международный Аэропорт Иркутск) (IATA: IKT, ICAO: UIII) is an international airport on the outskirts of Irkutsk, Russia, at a distance of 60 kilometers (37 miles) from Lake Baikal.

The first terminal was built in November 1938 In connection with the development of air traffic, the beginning of maintenance of second-generation jet aircraft (Tu-154) and the corresponding increase in passenger traffic, in February 1976, the second terminal was put into operation, built according to a standard project. In 1994, after the airport received the certificate of the Interstate Aviation Committee and the opening of the air harbor for international flights, the building of the first terminal after reconstruction was put back into operation to serve passengers of international flights. The second terminal, serving domestic airlines, existed unchanged until 2005. By this time, the station was already struggling to cope with the increase in passenger traffic. Additional areas were also required to accommodate technological equipment that meets the new requirements of transport security, automation and maintenance. The reconstruction was carried out according to an individual project by the specialists of Irkutskpromstroyproekt and helped to increase the area of the building almost twice — up to 13 thousand square meters. The terminal was reopened in 2009 and named the "Crystal Gate". None of the terminals are equipped with telescopic ladders — passengers are transported to aircraft by apron buses.

The airport has one artificial runway located away from the aprons, because of this, the taxiing route of aircraft can be 5 km. There are 14 taxiways, 2 aprons and 70 parking lots for various types of aircraft on the territory of the airfield. There is a separate heliport measuring 190 X 30 m with asphalt concrete pavement (for helicopters no more than 20 tons). Currently, only one taxiway meets modern requirements and can receive large international airliners. Of the 75 parking spaces, only five meet the same requirements.

ETOPS alternate airfield. The airport is located near the Trans-Siberian and cross-polar routes from Europe and North America to Southeast Asia, on which flights are operated according to ETOPS rules. In August 2000, the Boeing aircraft company, together with the Ministry of Transport, the FAA and interested airlines, conducted an assessment of the operational characteristics and safety of the airport, as a result of which it was confirmed that it could be used as a spare for extended-range flights of aircraft with two gas turbine engines (ETOPS).

Irkutsk International Airport is the main operator of the Irkutsk Airfield, a civilian joint—based airfield. In addition to civil aviation, the airfield is home to the state —2nd Separate Aviation Squadron of the Siberian District of the Russian Guard (v/ h 3543), which was established on March 31, 1980 and formed in 1981 on the basis of the expanded 1st separate Aviation Squadron of the Internal Troops of the Ministry of Internal Affairs in Khabarovsk (Khabarovsk-Central). In 1987, the squadron was relocated to Chita (Chita-1 Cheryomushki), and in 2007 — to Irkutsk. The squadron consists of five multi-purpose Mi-8 helicopters and one An-26 transport aircraft. Also, joint basing of aircraft of the Ministry of Defense and the Ministry of Emergency Situations of Russia is allowed at the airfield.

After the coronavirus pandemic, the domestic flights terminal began to experience a shortage of space for baggage collection, security checks, and boarding gates. In 2022, a decision was made to construct a new temporary arrival area building. The new terminal was completed in late 2024. The building is temporary (until the new airport is built) and is a modular, prefabricated structure. It is a single-story building with an area of 2,600 square meters. It has an arrival area, a baggage claim area, a pick-up area, and a transfer lounge. The opening of the new terminal was delayed due to legal proceedings. In June 2025, the terminal was opened for passenger arrivals. Neither terminal is equipped with telescopic ramps, and passengers are transported to aircraft using terminal buses.

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