Airports Council International in the context of "United Parcel Service"

Athens International Airport Eleftherios Venizelos (IATA: ATH, ICAO: LGAV), commonly initialised as AIA, is the largest international airport in Greece, serving the city of Athens and region of Attica. It began operation on 28 March 2001 (in time for the 2004 Summer Olympics) and is the main base of Aegean Airlines, as well as other smaller Greek airlines. It replaced the old Ellinikon International Airport.

Athens International Airport is currently a member of Group 1 of Airports Council International (over 25 million passengers). As of 2024, it is the 16th-busiest airport in Europe and the second busiest and second largest in the Balkans, after Istanbul Airport.

Dallas Fort Worth International Airport (IATA: DFW, ICAO: KDFW, FAA LID: DFW) is the primary international airport serving the Dallas–Fort Worth metroplex and the North Texas region, in the U.S. state of Texas.

It is the largest hub for American Airlines, which is headquartered near the airport, and is the third-busiest airport in the world by aircraft movements and the second-busiest airport in the world by passenger traffic in 2022 and 2023, according to the Airports Council International. As of 2025, it is the eighth-busiest international gateway in the United States and the busiest international gateway in Texas. The hub that American Airlines operates at DFW is the second-largest single airline hub in the world and the United States, behind Delta Air Lines's hub in Atlanta.

Taiwan Taoyuan International Airport (Traditional Chinese: 臺灣桃園國際機場) (IATA: TPE, ICAO: RCTP) is the main international airport serving Taiwan, particularly the northern region and Taipei. Located in Dayuan, Taoyuan, approximately 40 km (25 mi) west of Taipei, the airport is the busiest and largest in Taiwan. In 2016, it was ranked the best airport for its size in the Asia-Pacific region by Airports Council International.

The airport opened for commercial operations in 1979 as Chiang Kai-shek International Airport (中正國際機場) and was renamed in 2006. It is an important regional transshipment center, passenger hub, and gateway for destinations in Asia, and is one of two international airports that serve Taipei. The other, Taipei Songshan Airport, is located within the city limits and served as Taipei's only international airport until 1979. Songshan now mainly serves chartered flights, intra-island flights, and limited international flights.

An airport authority is an entity responsible for the operation and oversight of an airport or group of airports. The Airports Council International is the world trade association of airport authorities. In some countries, when the authority of an entity encompasses more than just the airports in an area, harbor and rail facilities for example, the entity may be referred to as a port authority.

The world's busiest airports by passenger traffic are measured by total passengers provided by the Airports Council International, defined as passengers enplaned plus passengers deplaned plus direct-transit passengers. The world's busiest airport is Hartsfield–Jackson Atlanta International Airport in metropolitan Atlanta, Georgia, which has been the world's busiest airport every year since 1998 with the exception of 2020, when its passenger traffic dipped for a year due to travel restrictions resulting from the COVID-19 pandemic. Atlanta regained the top position in 2021, and has held it since. Alternatively, London has the world's busiest city airport system by passenger count.

As of 2024, the United States has the most airports in the top 50 list, with 15 (16 in 2023), following by China having 12 (10 in 2023), while India and Spain have two. In terms of regions, North America has 17 airports in the top 50 (18 in 2023), followed by East Asia with 14 (12 in 2023), Europe with 8 (same as in 2023), Southeast Asia with 5 (6 in 2023), West Asia with three (same as 2023), South Asia with two (same as 2023), and South America with one (same as 2023).

The thirty world's busiest airports by aircraft movements are measured by total movements (data provided by Airports Council International). A movement is a landing or takeoff of an aircraft and includes both air transport movements and general aviation.

The world's thirty busiest airports by cargo traffic for various periods (data provided by Airports Council International). Numbers listed refer to loaded and unloaded freight in metric tonnes, including transit freight.

Indira Gandhi International Airport (IATA: DEL, ICAO: VIDP), known as Palam Airport until 1986, is the primary international airport serving New Delhi, the capital of India, and the National Capital Region (NCR). The airport, spread over an area of 5,106 acres (2,066 ha), is situated in Palam, Delhi (hence its former name), 15 km (9.3 mi) southwest of the New Delhi Railway Station and 16 km (9.9 mi) from the city centre.

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. It is also the busiest airport in the country in terms of cargo traffic. In the financial year of 2024–25, the airport handled over 7.92 crore (79.2 million) passengers, the highest ever in the airport's history. As of 2025, it is the ninth-busiest airport in the world, as per the latest rankings issued by the UK-based air consultancy firm, OAG. 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 third-busiest airport in Asia, handling over 7.78 crore (77.8 million) passengers in 2024. In fact, it is routinely one of the busiest airports in the world, according to the Airports Council International rankings.