Airport codes explained and why Abu Dhabi International Airport is called AUH

Airport identity codes are a challenge to be cracked, and while they may not always seem to make sense, there is a logic to them

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  Abu Dhabi International Airport, known as AUH, pictured from above. The airport opened in 1982 after the emirate outgrew the smaller Al Bateen Airport. Wam

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  Known as DXB, Dubai International Airport opened in 1960 and is now the world's busiest. Photo: Dubai Airports

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  An Air China plane lands at Beijing Capital International Airport. The airport's code is PEK, based on the Chinese city's former name Peking. EPA

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  Planes parked at Chhatrapati Shivaji Maharaj International Airport, behind the city buildings of Mumbai, India. The airport's code is BOM, after the city's former colonial name Bombay. AP

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  The air traffic control tower of terminal 2 at Chicago's O'Hare Airport. Its code of ORD is tied to its former name Orchard Field Airport. AFP

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  John F. Kennedy Airport in the Queens borough of New York, which opened in 1948 under its previous name Idlewild Airport, has the well-known JFK code. Reuters

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  Dublin Airport, Ireland's largest, was assigned the code of DUB and began operations in 1940. PA

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  Al Maktoum International Airport is also known as Dubai World Central and was assigned the code DWC by Iata. Photo: Dubai Airports

You’re at the airport, perhaps returning to Abu Dhabi from holiday or for work, and standing at the check in desk.

The airline worker checks your passport, issues a boarding pass and asks you to put the bags on a conveyor belt.

Finally, a printer whirrs and the baggage tag appears. But why does the label on the bag for Abu Dhabi International Airport read “AUH”?

It’s almost as confusing with Dubai International Airport which is known as “DXB”. Where the X did that come from?

In fact, these apparently weird airport labels make perfect sense. But you have to know how to crack the code, with the code masters in this case being the International Air Transport Association — or IATA for short — trade association of the world's airlines

IATA was founded in Havana, Cuba, in 1945, to promote co-operation among the world’s airlines. One of its roles is to issue airports with a unique three letter code, otherwise known as the location identifiers, which are printed on baggage tags.

The letters should represent, as closely as possible, the airport name. So, London’s Heathrow Airport is LHR and John F Kennedy in New York is JFK.

To avoid confusion, the codes are never changed. They are also issued in date order. And that’s when problems can occur.

Abu Dhabi International Airport should surely be ABU. Except that was already owned by Haliwen Airport — now known as A A Bere Tallo Airport — in Indonesia. So, what about ABD or AUD? Those are Abadan Airport in Iran and Aldan Airport in Russia, respectively.

So, the next best thing is the code AbU dHabi. Or AUH.

Dublin Airport in Ireland's largest and capital city. The airport was assigned the code of DUB by IATA. PA

Dubai is slightly different. DUB is already taken by Dublin in Ireland. DBA is Dalbandin in Pakistan. The letter X is commonly used in airport codes as a filler letter and so, DXB was chosen.

Sometimes cities change names. Chhatrapati Shivaji Maharaj International Airport serves Mumbai, but has the code BOM, after Bombay. Likewise, Beijing Capital International Airport is still PEK after the old name Peking.

Airports also change names after a code has been chosen. Chicago’s O’Hare International Airport, one of the busiest in the world, is named after Edward “Butch” O’Hare, a famous fighter pilot from the Second World War. But the airport was originally called Orchard Field, and so, the airport code is ORD, or ORcharD.

Dubai’s other airport is Al Maktoum International. But it is also referred to as Dubai World Central, after the wider cargo and logistics hub that surrounds the airport, and given the code DWC.

The permutations of codes are limited to the mathematic permutations of three letters, with 17,576 the maximum possible. At present, IATA says it has issued 11,026 codes.

The UAE has more airport codes that you might think. There are 12 in total.

Al Ain International Airport has AAN, Sharjah International Airport is SHJ and Fujairah International Airport FJR. Ras Al Khaimah International Airport uses RKT, since RAK is the Marrakech Menara Airport in Morocco.

Al Bateen Executive Airport opened in 1962 and functioned as Abu Dhabi's main airport until Abu Dhabi International Airport was inaugurated 20 years later. It is assigned the Iata code AZI. Photo: Al Ittihad

Al Bateen Executive Airport was the original Abu Dhabi International Airport, opening in 1969. It still uses the code AZI, since Abu Dhabi was often written as Abu Zabi in those days.

Small airports without multiple commercial airlines often begin with the letter X. Sir Bani Yas Airport is a popular tourist destination and has the code XSB for its airport.

The others are military airbases. DHF is Al Dhafra Air Base and NHD is Al Minhad Air Base in Dubai.

Understanding the airport code on your baggage tag, of course, does not guarantee its arrival at your destination. But at least it shows it is heading in the right direction.

A version of this article was first published on August 2, 2022