Lois Larson
Airport codes are a unique set of characters assigned to airports to enable their identification in various travel and logistical contexts. The two main types of airport codes are the three-letter IATA (International Air Transport Association) codes and the four-letter ICAO (International Civil Aviation Organization) codes. IATA codes are more commonly seen by travellers, used for ticketing, baggage handling, and cargo shipping. ICAO codes are used by pilots, air traffic controllers, and aviation authorities for flight planning, airline operations, and navigation. These codes are crucial for efficient travel and logistics, helping travellers, companies, and aviation professionals alike.
| Characteristics | Values |
|---|---|
| Definition | A unique set of characters assigned to an airport to enable its identification in air travel, ticketing, baggage handling, and logistics. |
| Number of characters | Typically three alphabetical characters but can also be four. |
| Types | IATA (International Air Transport Association) and ICAO (International Civil Aviation Organization). |
| Usage | Used in flight schedules, bookings, informational displays, flight planning, airline operations, and air traffic control. |
| Examples | LAX (Los Angeles International Airport), MIA (Miami International), DEN (Denver International), MDW (Chicago Midway International), JFK (John F. Kennedy International in New York City), YYZ (Toronto Pearson), YUL (Montréal–Trudeau). |
| Number of airport codes | 8,965 |
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What You'll Learn
IATA, ICAO, and FAA airport codes
Airport codes are 3- or 4-letter codes that are used to identify airports. The codes are assigned by the IATA, ICAO, FAA, and other civil aviation organizations.
IATA Airport Codes
IATA airport codes, also known as IATA location identifiers, are 3-letter geocodes designating airports and metropolitan areas worldwide. They are defined by the International Air Transport Association (IATA) and are used for airline timetables, reservations, and
ICAO Airport Codes
ICAO airport codes are 4-letter codes that are used for official purposes such as air traffic control and flight planning. These codes are defined by the International Civil Aviation Organization (ICAO) and are used to identify aerodromes and other aviation facilities worldwide. The first one or two letters of the ICAO code indicate the country, while the remaining letters identify the airport. For example, the ICAO code for Heathrow International Airport in London is EGLL, with EG indicating that it is based in the United Kingdom. ICAO codes are separate and different from IATA codes and are distributed by region and country.
FAA Airport Codes
The FAA is the governing body for aviation in the United States. FAA codes are often the same as IATA codes, except for the first letter, which is usually K unless in Hawaii, Alaska, or overseas territories. However, there are cases where IATA and FAA codes refer to different airports altogether.
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How airport codes are assigned
Airport codes are assigned by two official entities: the International Civil Aviation Organization (ICAO) and the International Air Transport Association (IATA). ICAO assigns four-letter codes that are used by pilots, air traffic control, airline operations planners, and other aviation facilities for navigation, air traffic, and flight planning. IATA, on the other hand, assigns three-letter codes that are used by the travel industry, including airlines, travel agents, and passengers.
The process of assigning airport codes has evolved over time, with the early days of aviation relying on Morse code and two-letter weather station codes. As the aviation industry expanded, it became necessary to implement longer codes to accommodate the growing number of airports. Today, the assignment of airport codes follows specific guidelines and considerations.
ICAO codes, also known as location indicators, have a more rigid structure, with the first two letters indicating the airport's geographic region. For example, the letter “E” denotes Northern Europe, “S” represents South America, and “C” stands for Canada. The second letter further narrows it down to the specific country within that region. These codes are used within the industry and are essential for navigation and communication purposes.
IATA codes, on the other hand, are more flexible and do not follow the same geographical rules as ICAO codes. While they often correspond to the city an airport serves, there are various reasons for assigning these codes. They are typically based on how the airport wants to identify itself and the availability of letter combinations. Some IATA codes are derived from the first three letters of the airport's city, such as “ATL” for Hartsfield-Jackson Atlanta International Airport and “MEX” for Mexico City. Others may use the city's initials, like "HKG" for Hong Kong or "SLC" for Salt Lake City.
It is worth noting that some airport codes are based on historical names or military heritage. For example, Chicago's O'Hare Airport is assigned "ORD" based on its previous name, Orchard Field. Additionally, airport codes can be reassigned to new facilities, such as the transfer of the "IST" code from Istanbul Atatürk Airport to the new Istanbul International Airport.
In summary, airport codes are assigned by either ICAO or IATA, with four-letter codes used for industry purposes and three-letter codes used for travel industry identification. The assignment of these codes takes into account geographical regions, city names, historical associations, and the airport's preference for self-identification.
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Airport codes and their use
Airport codes are three-letter codes that are used to identify airports and, in some cases, metropolitan areas. They are also known as IATA location identifiers or geocode and are defined by the International Air Transport Association (IATA). These codes are used universally and are easier to write and say than the full name of the airport. For example, LAX is easier to use than Los Angeles International Airport. These codes are used on baggage tags and are important for pilots, controllers, travel agents, computers, baggage handlers, and frequent flyers.
The codes are published twice a year in the IATA Airline Coding Directory. They are also used for certain railway stations, with lists of these codes available. The assignment of these codes is governed by IATA Resolution 763 and administered by IATA's headquarters in Montreal, Canada.
The ICAO airport code is another identification system used to designate airports. This is a four-character alphanumeric code defined by the International Civil Aviation Organization. These codes are used by air traffic control for flight planning and airline operations and are not included with the IATA codes used for reservations and baggage.
Airport codes are usually the first three letters of the city in which the airport is located. For example, YUL is used for Montreal–Trudeau airport. However, some airport codes are derived from the airport's former or unofficial name. For instance, Chicago's O'Hare International Airport is coded ORD for its original name, Orchard Field, and Kahului Airport's code is OGG, named after the local aviation pioneer Jimmy Hogg. Some airports in New Zealand use codes that contain the letter Z to distinguish them from similar airport names in other countries, such as HLZ for Hamilton and ZQN for Queenstown.
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History of airport codes
Airport codes, also known as IATA location identifiers or IATA station codes, are three-letter combinations that designate airports and metropolitan areas worldwide. The use of airport codes arose out of convenience for pilots to identify locations in the 1930s. Initially, pilots in the United States used a two-letter code from the National Weather Service (NWS) for identifying cities.
However, as the number of airports increased rapidly in the 1930s and 1940s, a two-letter system became unmanageable, and a transition to three-letter codes began. This allowed for a significantly larger number of permutations and provided room for new codes as more airports were built. The International Air Transport Association (IATA) administers the assignment of these codes, which are published semi-annually in the IATA Airline Coding Directory.
While some airport codes are derived straightforwardly from the airport's name, city, or geographical location, others have more obscure origins and hidden histories. For example, Chicago's O'Hare International Airport uses the code "ORD," which dates back to the airport's beginnings as Orchard Field, a military airbase during World War II. Similarly, John F. Kennedy International Airport in New York uses the code "JFK" to honour the late President John F. Kennedy.
In some cases, airport codes have remained consistent even as the airport's name changed. For instance, Louis Armstrong New Orleans International Airport retained the code "MSY" after its renaming in 2001. Canadian airport codes often start with the letter "Y," a legacy of the country's radio navigation system and weather reporting stations. These codes included "Y" for "Yes" to indicate the presence of a nearby weather station radio tower or "W" for "Without" to indicate the absence of one.
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Examples of airport codes
Airport codes are three- or four-letter codes used to identify a particular airport. There are two main types of airport codes: IATA (International Air Transport Association) and ICAO (International Civil Aviation Organization).
- BDL for Bradley International Airport in Hartford, Connecticut
- BWI for Baltimore/Washington International Airport
- IAD for Washington Dulles International Airport
- DCA for Ronald Reagan Washington National Airport
- MCO for Orlando International Airport (formerly McCoy Air Force Base)
- ORD for Chicago's O'Hare International Airport (formerly Orchard Field)
- JFK for John F. Kennedy International Airport in New York City
- LAX for Los Angeles International Airport
- MIA for Miami International Airport
- DEN for Denver International Airport
- MDW for Chicago Midway International Airport
Some examples of ICAO airport codes include:
- FACT for Cape Town, South Africa (FA for South Africa, CT for Cape Town)
- Canadian airport codes often start with Y, for example, YVR for Vancouver International Airport
- K for mainland US states, such as KSFO for San Francisco International Airport
- P for Pacific region airports, such as PHNL for Honolulu International Airport in Hawaii
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Frequently asked questions
An airport code is a three- or four-letter code used to identify a particular airport.
There are three main types of airport codes: ICAO, IATA, and FAA LIDs. ICAO and IATA codes are four- and three-letter codes, respectively, while FAA LIDs are three or four letters long.
The first letter of each airport code is assigned based on a global map that designates letters for specific regions. For example, "K" is for the United States, "Y" is for Australia, "S" is for South America, and "E" is for Germany, Scandinavia, and the UK. The last two letters typically relate to the city's name.
Airport codes are often derived from the name of the city or airport, like JFK for New York's John F. Kennedy International Airport. Some codes may also be based on the airport's former or unofficial name, like MCO for Orlando International Airport, which was previously McCoy Air Force Base.
You can use an online search tool, such as the one provided by IATA, to find the airport code for a particular airport. Simply enter the airport name or location, and the search tool will provide the corresponding code.
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