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> > >