Yes....3 letter is the ICAO code used for ATC purposes..all airlines actually, not just non-US. 2 letter or letter/number (not all airlines are two letters) are used for IATA use..to ID airlines for tariffs and and flight information as you point out. Walter DCA ----- Original Message ----- From: "David Ross" <damiross@earthlink.net> To: <AIRLINE@LISTSERV.CUNY.EDU> Sent: Wednesday, January 30, 2002 21:59 Subject: Re: Two-Letter Airline Codes > If I remmber correctly , 3 letter codes are used on flight plans and > international (non-USA) flights. The 2 letter codes are used in reservation > systems, OAG, and the like. > > ----- Original Message ----- > From: "Richard A Whitenight" <rum.runner@juno.com> > To: <AIRLINE@LISTSERV.CUNY.EDU> > Sent: Wednesday, January 30, 2002 17:38 > Subject: Re: [AIRLINE] Two-Letter Airline Codes > > > > Clay, um moi was under the impression that they were "three" letter > > designators? > > > > Richard > > On Wed, 30 Jan 2002 07:36:35 -0800 clay.wardlow@adic.com writes: > > > Hello All, > > > > > > Where is a good place to go to find the two-letter airline codes? > > > > > > Thanks! > > > Clay Wardlow > > > Technical Writer > > > Advanced Digital Information Corp. > > > 720.249.5791 > > > Visit ADIC on the web at: > > > <http://www.adic.com> > > > >