Moderators: jsumali2, richierich, ua900, PanAm_DC10, hOMSaR

 
burchfiel
Topic Author
Posts: 479
Joined: Wed Jul 11, 2007 10:34 am

Why Are Dulles And Houston IAD and IAH?

Wed Jan 14, 2015 10:26 pm

I was wondering why Dulles's IATA code is IAD, rather than DIA. After all, no one refers to the airport as "International Airport Dulles."

It doesn't appear that any airport is currently assigned DIA. WAS WIA (Washington International Airport) also could have worked. Were people worried about confusion with Stapleton?

Likewise, why IAH and not HIA? HIA is taken now, but HIA only opened in 2008 -- I don't know if the code was available before that.

I admit this is not the most important topic on the Airliners.net forums, but I was just curious.  
 
bpat777
Posts: 698
Joined: Sun Nov 28, 1999 8:21 am

Why Are Dulles And Houston IAD and IAH?

Wed Jan 14, 2015 10:31 pm

I've wondered that about IAH myself. I figured it was short for International Airport of Houston. IAD maybe International Airport of District of Columbia?
 
tzsfo
Posts: 202
Joined: Mon Dec 02, 2002 2:07 am

Why Are Dulles And Houston IAD and IAH?

Wed Jan 14, 2015 10:34 pm

Here is an old thread I found on the subject - it at least has some guesses.

What Does The IA Stand For In IAH And IAD? (by IloveBOI Aug 1 2003 in Civil Aviation)
It takes nerves of steel to stay neurotic. — Herb Kelleher
 
opethfan
Posts: 940
Joined: Mon Dec 31, 2012 6:35 am

Why Are Dulles And Houston IAD and IAH?

Wed Jan 14, 2015 10:37 pm

I've heard before that authorities don't like airports in the same metro area to have the same first letter of their code because it can cause confusion / mixups with tickets and bag routing. Of course, that isn't how it plays out in Canada or in London (LGW and LHR) or even in LA (LAX and LGB) but it's understandable.

Quoting bpat777 (Reply 1):
IAD maybe International Airport of District of Columbia?

I'd assume the D stands for Dulles.
 
stratacruiser
Posts: 236
Joined: Thu Dec 08, 2011 7:07 pm

Why Are Dulles And Houston IAD and IAH?

Wed Jan 14, 2015 10:49 pm

Before being renamed for the 41st President, IAH was Houston Intercontinental....or Intercontinental Airport Houston for those assigning the codes at IATA.

Dave
 
Sooner787
Posts: 2752
Joined: Thu Jul 18, 2013 1:44 am

Why Are Dulles And Houston IAD and IAH?

Wed Jan 14, 2015 10:52 pm

it's a conspiracy to trip up future travel agents and airlines employees LOL
 
User avatar
redzeppelin
Posts: 1195
Joined: Wed Feb 08, 2012 4:30 pm

Why Are Dulles And Houston IAD and IAH?

Wed Jan 14, 2015 10:55 pm

Quoting Sooner787 (Reply 5):
it's a conspiracy to trip up future travel agents and airlines employees LOL

You might be right:
The night before an early morning flight out of IAH (about 3 years ago), I received an automated phone call from DL informing me that the flight was cancelled. I jumped online to check my rebooking options, only to find that there were no seats available on any DL flights out of IAH. I called in to Delta, and the agent offered me alternates out of AUS or DFW before unexpectedly finding me something out of Houston. She rebooked me, I hung up, and then I checked the new itinerary in my email. She had booked me out of IAD! I called back later and got it worked out.  
 
alfa164
Posts: 3772
Joined: Sat Oct 06, 2012 2:47 am

Why Are Dulles And Houston IAD and IAH?

Wed Jan 14, 2015 11:09 pm

Quoting Burchfiel (Thread starter):
I was wondering why Dulles's IATA code is IAD, rather than DIA.

For many years, Denver International was called "DIA" publicly, even though its airport code was DEN. I don't know if that might be one reason, but it is a possibility.
I'm going to have a smokin' hot body again!
I have decided to be cremated....
 
User avatar
TWA772LR
Posts: 7408
Joined: Thu Nov 17, 2011 6:12 am

Why Are Dulles And Houston IAD and IAH?

Wed Jan 14, 2015 11:15 pm

Quoting redzeppelin (Reply 6):
She had booked me out of IAD!

A certain international airline I used to work for in IAH had a baggage mishap some months ago and among the fiasco were a handful of bags that were supposed to go ABC-XYZ-IAD! I wonder how many IAH bags ended up in IAD.
When wasn't America great?


The thoughts and opinions shared under this username are mine and are not influenced by my employer.
 
FriendlySkies
Posts: 3540
Joined: Fri Aug 13, 2004 3:57 pm

Why Are Dulles And Houston IAD and IAH?

Wed Jan 14, 2015 11:38 pm

Quoting alfa164 (Reply 7):
For many years, Denver International was called "DIA" publicly

It still is, at least in Colorado.
 
User avatar
1337Delta764
Posts: 5920
Joined: Mon Oct 31, 2005 4:02 am

Why Are Dulles And Houston IAD and IAH?

Wed Jan 14, 2015 11:41 pm

Quoting alfa164 (Reply 7):
For many years, Denver International was called "DIA" publicly, even though its airport code was DEN. I don't know if that might be one reason, but it is a possibility.

A similar situation occurs in Orlando, where the local media refers to MCO as "OIA".
 
User avatar
gdg9
Posts: 1014
Joined: Thu Jun 30, 2005 9:42 am

Why Are Dulles And Houston IAD and IAH?

Thu Jan 15, 2015 12:04 am

I think ICAO rules prohibit airports within 200 miles of each other from having the same first two or last two letters in the code, so IAD couldn't have been DIA when created.

This link has some possible explanation, and touches on the 200 mile issue. http://www.skygod.com/asstd/abc.html Some of this may be urban legend, but still of interest.
@dfwtower
 
burchfiel
Topic Author
Posts: 479
Joined: Wed Jul 11, 2007 10:34 am

Why Are Dulles And Houston IAD and IAH?

Thu Jan 15, 2015 12:18 am

Quoting gdg9 (Reply 11):
This link has some possible explanation, and touches on the 200 mile issue. http://www.skygod.com/asstd/abc.html Some of this may be urban legend, but still of interest.

That's a fascinating article, thanks for sharing. I had no idea that new codes can't start with N, K, or W.
 
tymnbalewne
Posts: 714
Joined: Mon Mar 21, 2005 3:06 am

Why Are Dulles And Houston IAD and IAH?

Thu Jan 15, 2015 12:26 am

Re: IAD....I seem to recall that, back in the day when ATC strips were handwritten, DIA and DCA could easily be confused.
Dewmanair...begins with Dew
 
User avatar
777Jet
Posts: 6987
Joined: Sat Mar 08, 2014 7:29 am

Why Are Dulles And Houston IAD and IAH?

Thu Jan 15, 2015 12:34 am

Quoting Burchfiel (Thread starter):
I was wondering why Dulles's IATA code is IAD,
Quoting Burchfiel (Thread starter):
Likewise, why IAH

Thanks for starting this thread.

I have always wondered the same thing regarding IAD & IAH.

At least I now know why  
DC10-10/30,MD82/88/90, 717,727,732/3/4/5/7/8/9ER,742/4,752/3,763/ER,772/E/L/3/W,788/9, 306,320,321,332/3,346,359,388
 
User avatar
Miami
Posts: 6194
Joined: Sat Sep 15, 2012 8:37 pm

Why Are Dulles And Houston IAD and IAH?

Thu Jan 15, 2015 12:53 am

Quoting 777Jet (Reply 14):

Same. Very interesting.

There's lots of airports with interesting, yet confusing IATA code.
Aviation is proof that given, the will, we have the capacity to achieve the impossible. - Eddie Rickenbacker
 
citationjet
Posts: 2563
Joined: Sun Mar 09, 2003 2:26 am

Why Are Dulles And Houston IAD and IAH?

Thu Jan 15, 2015 12:59 am

Here is a nice video that explains some of the rules for airport codes.
http://www.youtube.com/watch?v=63NLvAz5CDg
Boeing Flown: 701,702,703;717;720;721,722;731,732,733,734,735,73G,738,739;741,742,743,744,747SP;752,753;762,763;772,773,788.
 
thomasphoto60
Posts: 3891
Joined: Thu Jan 27, 2000 1:04 pm

Why Are Dulles And Houston IAD and IAH?

Thu Jan 15, 2015 12:59 am

Quoting Miami (Reply 15):
There's lots of airports with interesting, yet confusing IATA code.


Sioux City has been trying for years to get their code SUX changed, with no luck.
"Show me the Braniffs"
 
jb1087xna
Posts: 514
Joined: Tue Jun 03, 2014 2:11 am

Why Are Dulles And Houston IAD and IAH?

Thu Jan 15, 2015 1:00 am

Quoting Miami (Reply 15):
There's lots of airports with interesting, yet confusing IATA code.

Though I have to call it my home airport, XNA definitely falls into the characteristic of... interesting.  
 
smokeybandit
Posts: 1434
Joined: Mon Mar 17, 2014 3:24 pm

Why Are Dulles And Houston IAD and IAH?

Thu Jan 15, 2015 1:07 am

Quoting tymnbalewne (Reply 13):
Re: IAD....I seem to recall that, back in the day when ATC strips were handwritten, DIA and DCA could easily be confused.

That's how I've understood it, too.
 
User avatar
OzarkD9S
Posts: 5755
Joined: Tue Oct 23, 2001 2:31 am

Why Are Dulles And Houston IAD and IAH?

Thu Jan 15, 2015 1:21 am

I remember reading an article in ATW back in the late 80's or 90's that a few Republican Congressmen were floating around an idea to rename Dulles after Dwight D. Eisenhower and change the code to IKE. Nothing much came of it of course.
"My soul is in the sky". -Pyramus- A Midsummer's Night Dream
 
sparky35805
Posts: 211
Joined: Mon Dec 31, 2007 9:27 pm

Why Are Dulles And Houston IAD and IAH?

Thu Jan 15, 2015 1:24 am

Someone mentioned Orlando as MCO.Airlines started serving it when it was still McCoy Air Force Base in the very early 1960s.
 
User avatar
TWA772LR
Posts: 7408
Joined: Thu Nov 17, 2011 6:12 am

Why Are Dulles And Houston IAD and IAH?

Thu Jan 15, 2015 3:14 am

Quoting thomasphoto60 (Reply 17):
Sioux City has been trying for years to get their code SUX changed, with no luck.

Its a good thing no airline flies Sioux City to Dickinson, ND.
When wasn't America great?


The thoughts and opinions shared under this username are mine and are not influenced by my employer.
 
a380787
Posts: 4573
Joined: Tue Jul 09, 2013 4:38 pm

Why Are Dulles And Houston IAD and IAH?

Thu Jan 15, 2015 3:18 am

Quoting TWA772LR (Reply 22):

Or fly Fukuoka to Montreal
 
IAHflyer97
Posts: 740
Joined: Thu Jun 27, 2013 3:45 pm

Why Are Dulles And Houston IAD and IAH?

Thu Jan 15, 2015 3:21 am

Quoting a380787 (Reply 23):

Fresno to Fukuoka?
A man is only as big as the amount of strings on his guitar.
 
steeler83
Posts: 7700
Joined: Sat Feb 25, 2006 2:06 pm

Why Are Dulles And Houston IAD and IAH?

Thu Jan 15, 2015 3:31 am

Quoting thomasphoto60 (Reply 17):
Sioux City has been trying for years to get their code SUX changed, with no luck.

That... well sux.

Quoting IAHflyer97 (Reply 24):
Fresno to Fukuoka?

Aw man... something funny I read in an email about some of the dumbest people to ever hold political office came to mind.

Some guy was complaining about why his baggage sticker said he was "fat." The ticketing agent was trying to tell him that FAT was the IATA code for Fresno's airport.

Then you posted that statement and I just cracked up.

"FAT-FUK?! Are you kidding me?!!"

Thanks for the laugh.  
Do not bring stranger girt into your room. The stranger girt is dangerous, it will hurt your life.
 
rampart
Posts: 1800
Joined: Sun Aug 07, 2005 5:58 am

Why Are Dulles And Houston IAD and IAH?

Thu Jan 15, 2015 3:32 am

Quoting alfa164 (Reply 7):
For many years, Denver International was called "DIA" publicly, even though its airport code was DEN. I don't know if that might be one reason, but it is a possibility.
Quoting FriendlySkies (Reply 9):
It still is, at least in Colorado.

But not Stapleton (former DEN). Stapleton Field became Stapleton International Airport, but nobody called it Denver International. DIA was only used once the new airport was built. Dulles was built decades earlier than the new Denver airport, so "DIA" was not used, officially or unofficially, by any airport in Denver at the time.

-Rampart
 
UA735WL
Posts: 290
Joined: Mon Apr 09, 2012 7:08 pm

Why Are Dulles And Houston IAD and IAH?

Thu Jan 15, 2015 3:32 am

Quoting IAHflyer97 (Reply 24):

Or Fresno to Cancun....  

All joking aside, I've always wondered about IAH & OAD's codes.
"One test is worth a thousand expert opinions" -Tex Johnston
 
Gasman
Posts: 2203
Joined: Mon Mar 01, 2004 10:06 am

Why Are Dulles And Houston IAD and IAH?

Thu Jan 15, 2015 8:51 am

Quoting UA735WL (Reply 27):
All joking aside, I've always wondered about IAH & OAD's codes

And Toronto? YYZ? WTF?
 
B747forever
Posts: 13861
Joined: Mon May 21, 2007 9:50 pm

Why Are Dulles And Houston IAD and IAH?

Thu Jan 15, 2015 9:24 am

Quoting gdg9 (Reply 11):
This link has some possible explanation, and touches on the 200 mile issue. http://www.skygod.com/asstd/abc.html Some of this may be urban legend, but still of interest.

Now that was an interesting read.

Thanks for sharing.
Work Hard, Fly Right
 
mark2fly1034
Posts: 251
Joined: Mon Oct 24, 2011 11:38 pm

Why Are Dulles And Houston IAD and IAH?

Thu Jan 15, 2015 1:10 pm

Quoting 1337Delta764 (Reply 10):
Quoting alfa164 (Reply 7):For many years, Denver International was called "DIA" publicly, even though its airport code was DEN. I don't know if that might be one reason, but it is a possibility.

A similar situation occurs in Orlando, where the local media refers to MCO as "OIA".

That drives me crazy that they call it OIA.
 
a380787
Posts: 4573
Joined: Tue Jul 09, 2013 4:38 pm

Why Are Dulles And Houston IAD and IAH?

Thu Jan 15, 2015 1:22 pm

Try flying Shanghai to Cincinnati to Paris all on skyteam you'll get PVG-CVG-CDG ... and that's convoluted
 
User avatar
PA727
Posts: 188
Joined: Sun Dec 25, 2011 5:09 pm

Why Are Dulles And Houston IAD and IAH?

Thu Jan 15, 2015 1:23 pm

Quoting jb1087xna (Reply 18):
Though I have to call it my home airport, XNA definitely falls into the characteristic of... interesting.

And here's why, at the time XNA was built, they couldn't use the desired and obvious code, NWA. XNA was chosen for three reasons: 1. It's unique, 2. It still refers to Northwest Arkansas (NA), 3. They liked the way it alluded to what they considered to be an "Exciting New Airport.

Now you kno
 
bond007
Posts: 4428
Joined: Mon Mar 14, 2005 2:07 am

Why Are Dulles And Houston IAD and IAH?

Thu Jan 15, 2015 2:19 pm

Quoting 1337Delta764 (Reply 10):
A similar situation occurs in Orlando, where the local media refers to MCO as "OIA".

...and a similar situation down the road, where they refer to TPA as TIA!
I'd rather be on the ground wishing I was in the air, than in the air wishing I was on the ground!
 
User avatar
propellix
Posts: 17
Joined: Tue May 03, 2005 11:26 pm

Why Are Dulles And Houston IAD and IAH?

Thu Jan 15, 2015 2:38 pm

Quoting tymnbalewne (Reply 13):

ATC NEVER used IATA codes; so that couldn´t be the point.
ATC always used ICAO 4-letter codes.
Actually regarding the USA, that doesn´t help it all, as for the major U. S. airports the ICAO codes differ from the IATA ones only through a K added in first position: KIAD, KJFK, KATL, KBOS, KLAX, etc.

I have to admit, I prefer the ICAO codes as they also indicate world region and country (if the first letter is not indicating country like USA/K, Canada/C, China/Z or former USSR/U).
I think the main reason for IATA codes sticking was the need to save on any possible data volume regarding the first generation of automatic distribution/processing systems.

Same reason why IATA uses 2 letter airline codes and ICAO three letter and 3 digit aircraft type codes versus 4 digit ICAO aircraft codes.
 
drgmobile
Posts: 989
Joined: Tue Aug 29, 2006 3:06 am

Why Are Dulles And Houston IAD and IAH?

Thu Jan 15, 2015 2:43 pm

Quoting gdg9 (Reply 11):
I think ICAO rules prohibit airports within 200 miles of each other from having the same first two or last two letters in the code, so IAD couldn't have been DIA when created.

Not so much. More than 95% of the airport codes in Canada start with Y
 
727LOVER
Posts: 8633
Joined: Tue Oct 09, 2001 12:22 am

Why Are Dulles And Houston IAD and IAH?

Thu Jan 15, 2015 2:51 pm

Quoting 1337Delta764 (Reply 10):
A similar situation occurs in Orlando, where the local media refers to MCO as "OIA".

Same with TPA, referred to in local media as TIA

Quoting thomasphoto60 (Reply 17):
Sioux City has been trying for years to get their code SUX changed, with no luck.

I think the only airports in the USA that have had their codes changed were:
DIA    IAD
BAL    BWI
IDL    JFK

Quoting TWA772LR (Reply 22):
Its a good thing no airline flies Sioux City to Dickinson, ND.

or through Fresno!
"We must accept finite disappointment, but never lose infinite hope." - Martin Luther King, Jr.
 
IADCA
Posts: 2202
Joined: Mon Feb 26, 2007 12:24 am

Why Are Dulles And Houston IAD and IAH?

Thu Jan 15, 2015 2:52 pm

Quoting tymnbalewne (Reply 13):
Re: IAD....I seem to recall that, back in the day when ATC strips were handwritten, DIA and DCA could easily be confused
Quoting smokeybandit (Reply 19):
That's how I've understood it, too.

It's basically this, but it also has to do with reading bag tags quickly as well. People generally read words (to simplify) by looking at the beginning and end of a word, which is why typos in the mdidle of wrdos don't mkae it impssbiole to read tehm. The quicker you read, the stronger this tendency becomes. DCA and DIA would only differ by a single letter - the middle one - hence IAD.

[Edited 2015-01-15 07:51:21]
 
User avatar
flylku
Posts: 597
Joined: Sat Apr 08, 2006 10:44 pm

Why Are Dulles And Houston IAD and IAH?

Thu Jan 15, 2015 3:13 pm

Someone who knows their history better than I do confirm or refute this but I believe that IAD originally had a different code that created confusion (I think with a Dallas airport ?) so it was changed to IAD. I will heck with my dad who will remember the details.
...are we there yet?
 
brilondon
Posts: 3164
Joined: Sun Aug 21, 2005 6:56 am

Why Are Dulles And Houston IAD and IAH?

Thu Jan 15, 2015 3:25 pm

Quoting gasman (Reply 28):

And Toronto? YYZ? WTF?

Rush would have to change their song if it was anything else.

Canada's airports have the Y in front of them to differentiate from the U.S. airports I believe but I am probably wrong.
Rush forever Closer To My Heart
 
26point2
Posts: 1104
Joined: Wed Mar 03, 2010 6:01 am

Why Are Dulles And Houston IAD and IAH?

Thu Jan 15, 2015 3:59 pm

Quoting 727LOVER (Reply 36):
or through Fresno!

Plenty of airlines go through Fresno..

Quoting brilondon (Reply 39):
Canada's airports have the Y in front of them to differentiate from the U.S. airports I believe but I am probably wrong.

Actually, Canada's airport codes all start with a C to differentiate them from the rest.
 
User avatar
cathay747
Posts: 1512
Joined: Sun Nov 23, 2003 8:47 pm

RE: Why Are Dulles And Houston IAD And IAH?

Thu Jan 15, 2015 4:07 pm

As far as I know, they stand for (and always did) "International Airport Houston" and
"International Airport Dulles". Plain and simple. As to the reasoning, well, that's anybody's
guess.
Try a Little VC-10derness
 
slider
Posts: 7637
Joined: Wed Feb 25, 2004 11:42 pm

RE: Why Are Dulles And Houston IAD And IAH?

Thu Jan 15, 2015 4:11 pm

Quoting Burchfiel (Reply 12):
I had no idea that new codes can't start with N, K, or W.

Yup- that's why we have BNA, EWR, etc and explains those codes.

Quoting 727LOVER (Reply 36):
DIA IAD
BAL BWI
IDL JFK

I believe you're right. Idlewild used to be a golf course (or the land was supposed to become one, can't recall offhand) and then it became the airport, to be changed in 1963 right after JFK was assassinated.



****

As it pertains to IAH, however, all commercial traffic shifted from HOU once IAH opened. Because of the risk of aviator and navigatory confusion, they had to have a brand new second code and HOU simply couldn't shift north. HOU stayed GA only until Southwest started up.
 
D L X
Posts: 12715
Joined: Thu May 27, 1999 3:30 am

RE: Why Are Dulles And Houston IAD And IAH?

Thu Jan 15, 2015 4:12 pm

Quoting 26point2 (Reply 40):
Actually, Canada's airport codes all start with a C to differentiate them from the rest.

And most (nearly all) American airport codes start with K, we just drop the K. The K is a radio station identifier for the airport. The United States uses radio stations that begin with the letters W-, K-, N- and P-.* (So, it's actually KEYW, which makes a lot of sense, don't it?)

My question has always been, knowing that it's actually KEWR and KORF and not NEWR and NORF, why do we drop the N from Newark and Norfolk? Why not NEW or NWK and NRF or something like that? I'm sure there are others as well, just those two pop to the front of my mind.

* Someone correct me if this isn't 100% correct.

[Edited 2015-01-15 08:19:02]
 
User avatar
lugie
Posts: 908
Joined: Mon Jun 03, 2013 4:11 pm

RE: Why Are Dulles And Houston IAD And IAH?

Thu Jan 15, 2015 4:20 pm

Quoting D L X (Reply 43):
My question has always been, knowing that it's actually KEWR and KORF and not NEWR and NORF, why do we drop the N from Newark and Norfolk? Why not NEW or NWK and NRF or something like that? I'm sure there are others as well, just those two pop to the front of my mind.

three-letter IATA codes starting with N are reserved for Air Force Bases in the US as far as I know, so to avoid confusion there are no civilian airports with Nxx codes in North America, however we do have them in Europe ( NUE, NCL for instance)
Q400 E175 E190 CRJ7 CRJ9 CRJX MD88 A319 A320 A321 A332 A333 A359 B733 B73G B738 B739 B748 B764 B772 B77W B788 B789
FRA STR HAM TXL MUC ZRH ACE BRU BLL DUB MAN ARN MAD OPO LIS FNC AMS PHL RDU LGA CLT EWR ORD ATL SFO MDW IAD YYZ SJO PTY
 
superjeff
Posts: 1382
Joined: Fri Feb 05, 2010 2:14 am

RE: Why Are Dulles And Houston IAD And IAH?

Thu Jan 15, 2015 4:23 pm

Quoting flylku (Reply 38):
Someone who knows their history better than I do confirm or refute this but I believe that IAD originally had a different code that created confusion (I think with a Dallas airport ?) so it was changed to IAD. I will heck with my dad who will remember the details.

DAL is Dallas Love Field (DAL=Dallas); DUL could have been Dulles, but has pretty negative connotations (although this would possibly have been fitting for that airport, at least in the old days  
 
a380787
Posts: 4573
Joined: Tue Jul 09, 2013 4:38 pm

RE: Why Are Dulles And Houston IAD And IAH?

Thu Jan 15, 2015 4:32 pm

Quoting Slider (Reply 42):

I believe you're right. Idlewild used to be a golf course (or the land was supposed to become one, can't recall offhand) and then it became the airport, to be changed in 1963 right after JFK was assassinated.

Funny it still feels like a golf course because the new JFK T4B for Delta is as long as multiple par-5 holes.
 
psolk
Posts: 66
Joined: Tue Jul 11, 2006 1:33 am

RE: Why Are Dulles And Houston IAD And IAH?

Thu Jan 15, 2015 4:40 pm

ORD and MCO always got me...
 
YYCSpotter
Posts: 206
Joined: Thu Jul 05, 2012 6:03 pm

RE: Why Are Dulles And Houston IAD And IAH?

Thu Jan 15, 2015 4:59 pm

Quoting 26point2 (Reply 40):
Actually, Canada's airport codes all start with a C to differentiate them from the rest.

If we look at the airport code for Toronto, CYYZ, there are three parts

"C" = Canadian Airport

"Y" = Weather services available

"YZ" = Airport Identifier.

I hope this clears things up for Canadian Airports!
 
bmacleod
Posts: 2990
Joined: Sat Aug 25, 2001 3:10 am

RE: Why Are Dulles And Houston IAD And IAH?

Thu Jan 15, 2015 5:00 pm

IAD as the International Airport for DC compared to DCA which flies domestic and to Canada.

IAH as the International Airport for Houston compared to HOU.

[Edited 2015-01-15 09:02:42]
"What good are wings without the courage to fly?" - Atticus

Popular Searches On Airliners.net

Top Photos of Last:   24 Hours  •  48 Hours  •  7 Days  •  30 Days  •  180 Days  •  365 Days  •  All Time

Military Aircraft Every type from fighters to helicopters from air forces around the globe

Classic Airliners Props and jets from the good old days

Flight Decks Views from inside the cockpit

Aircraft Cabins Passenger cabin shots showing seat arrangements as well as cargo aircraft interior

Cargo Aircraft Pictures of great freighter aircraft

Government Aircraft Aircraft flying government officials

Helicopters Our large helicopter section. Both military and civil versions

Blimps / Airships Everything from the Goodyear blimp to the Zeppelin

Night Photos Beautiful shots taken while the sun is below the horizon

Accidents Accident, incident and crash related photos

Air to Air Photos taken by airborne photographers of airborne aircraft

Special Paint Schemes Aircraft painted in beautiful and original liveries

Airport Overviews Airport overviews from the air or ground

Tails and Winglets Tail and Winglet closeups with beautiful airline logos