Can't answer your q exactly, but.....looks like that flight will be changing to a 333 soon.... ..anyway...looking at a big picture of the flights listing in the OAG, some flights have a 3 tacked on as a prefix of the flight number during certain days of the week...while others do not. That flight appears to be a stand alone and does not include a day when a 3 is added. All of the evening flights do not include a 3 prefix, while most morning to afternoon flights do, and some only on certain days. Just a thought..without looking it up....could it be on those days a 3 is added for ATC purposes due to flights being in the air (or ATC clearances given) with the same base flight number? Walter DCA ----- Original Message ----- From: "Mike Gammon" <jmgammon@sympatico.ca> To: <AIRLINE@LISTSERV.CUNY.EDU> Sent: Friday, March 01, 2002 07:28 Subject: Re: ACs 3xxx flight numbers > I flew an AC A321 from YUL-YYZ and the flight no. was 420 with no "3" > prefix. I'm curious too. > > Mike Gammon > > ----- Original Message ----- > From: "Matthew Montano" <mmontano@direct.ca> > To: <AIRLINE@LISTSERV.CUNY.EDU> > Sent: Thursday, February 28, 2002 3:42 PM > Subject: ACs 3xxx flight numbers > > > > I still have an old question from a while back. > > > > AC used to use 3xxx flight numbers to indicate flights operated by CP > > planes and crews. > > > > ... and for the most part, they still do. > > > > But it's not always consistent, and I'm wondering if there is a simple > > explanation. > > > > I.e. > > > > YYZ-YUL - AC 402 0800-0911 - Airbus 321 > > YYZ-YUL - AC3404 0900-1011 - Airbus 321 > > > > Clearly the 321 is not an old CP inheriteted bird. > > > > Anyone have any idea? > > > > Matthew >