sierra3tango
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Why IAD & IAH?

Mon Jun 17, 2013 2:59 pm

The IATA codes for airports in the USA seem to follow the practice used around the world with the exception of IAD & IAH,
Why?

I assume these codes were dreamt up years ago and its too difficult to change them. Rather like Mumbai still has BOM as its code as presumably any change gone into the too difficult tray

Airports are quite often named after (locally) famous people, Houston after George Bush (presumably after the code was created) and Washington after ?John Foster Dulles?

Is it something like 'international airport' where (at the time of creation of the code) there were 2 airports in these cities?

Anybody know why?
 
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STT757
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RE: Why IAD & IAH?

Mon Jun 17, 2013 3:05 pm

International Airport Dulles (IAD)
Intercontinental airport Houston (IAH)

HOU was already taken by Houston Hobby airport before IAH was built. And DCA was established before IAD.
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BigGSFO
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RE: Why IAD & IAH?

Mon Jun 17, 2013 3:08 pm

Quoting STT757 (Reply 1):
HOU was already taken by Houston Hobby airport before IAH was built. And DCA was established before IAD.

...and WAS was already taken to indicate all Washington DC airports.
 
IAHFLYR
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RE: Why IAD & IAH?

Mon Jun 17, 2013 3:37 pm

Moderators, suggest deletion this thread as the same already exists in civil aviation.
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IAHFLYR
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RE: Why IAD & IAH?

Mon Jun 17, 2013 5:28 pm

Well it looks like the mods locked the other thread....oh well.
Any views shared are strictly my own and do not a represent those of any former employer.
 
sierra3tango
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RE: Why IAD & IAH?

Mon Jun 17, 2013 5:40 pm

Quoting IAHFLYR (Reply 4):
Well it looks like the mods locked the other thread....oh well.

I give up, what a waste of time
 
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kgaiflyer
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RE: Why IAD & IAH?

Mon Jun 17, 2013 5:44 pm

Quoting mesaflyguy (Reply 4):
it is physically located in Dulles, Virginia

Quoting simairlinenet (Reply 8):
"Dulles, Virginia" did not exist as an area until well after the airport was built.


What we now call "The Village of Dulles" is an unincorporated area that we used to call "Chantilly." AFAIK, the original "Dulles" community was a housing area developed by the Van Meter real estate group.
 
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TWA772LR
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RE: Why IAD & IAH?

Tue Jun 18, 2013 5:42 am

Since this is about airports in the USA with "IA" as the first to letters in the airport code, I got one even better, McConnell AFB is IAB...
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nrt1011
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RE: Why IAD & IAH?

Tue Jun 18, 2013 9:12 am

Well those explanations seem reasonable. Now have a go at why us, in Canada, have weird names like YYZ for Toronto etc.
 
sierra3tango
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RE: Why IAD & IAH?

Tue Jun 18, 2013 12:30 pm

Quoting nrt1011 (Reply 8):
Well those explanations seem reasonable. Now have a go at why us, in Canada, have weird names like YYZ for Toronto etc.

OK - tell us why Canada has weird codes
 
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AA777223
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RE: Why IAD & IAH?

Tue Jun 18, 2013 2:36 pm

Why doesn't it create the same issue with DAL and DFW that DIA and DCA had, for example?
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blueflyer
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RE: Why IAD & IAH?

Tue Jun 18, 2013 11:52 pm

Quoting nrt1011 (Reply 8):
Now have a go at why us, in Canada, have weird names like YYZ for Toronto etc.

I am missing some of the details, but the short answer is, it goes back to weather reporting station codes. Historically, they were two-letter codes with the first letter chosen from V to Z (I think) to distinguish them from US stations.

When airports were built, they "adopted" the code of the weather station nearby, when one was available, if not they made up a new code. Eventually, someone decided it was necessary to distinguish airports with and without a weather station, and all airports with weather reporting had a Y added to the front of their code (unofficially for "yes weather service is available"), and airports without got a Z instead.

I think it is still true to this day. Smaller Canadian airports without their own weather service have a three-letter code starting with Z, not Y.

Note: strictly from memory and I certainly don't deal with weather station codes every day, so I probably bungled a few things.
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