My first post ever here, just want to give a quick shout to PMDG, I have purchased many of their products and the 777 will be no different. Thank you for such an amazing product line and please continue the great work on whatever you have coming down the pipeline.
At my airline Air Canada where I work in operations, there is somewhat a pattern to the coding of flight numbers. None have been replaced in ages but new ones popping up due to increasing routes. The following is a generalized breakdown.
This is from the Hub, YYZ
Odd #'s West
Even #'s East
Example for our 777 forum AC033 Westbound from YYZ-YVR-SYD, then AC034 SYD-YVR-YYZ... AC015 YYZ-HKG, AC016 HKG-YYZ... AC872 YYZ-FRA, AC873 FRA-YYZ.
AC001-099 - Asia, Australia, Middle East, South America,
AC100-199 - West Canada
AC200-299 - Central Canada
AC300-399 - USA Central Northeast
AC400-499 - Rapidair (Hourly to YOW/YUL)
AC500-599 - USA West/Central
AC600-699 - Canada East
AC700-799 - New York Area (LGA/EWR), West Coast USA (LAX/SFO) basically US Star Hubs
AC800-899 - Europe
AC900-999 - USA Florida, Caribbean Year Round
AC1000-1999 - Caribbean Seasonal, Air Canada Vacations Charters and USA Seasonal
AC2000-2999 - Number 2 added for a flight that has been under heavy delay and will be flying roughly at or close too the same time as the primary flight the next day
AC3000-6999 - These generally show up as code sharing flights. Ex. AC5079 could be UA100 to wherever it goes.
AC7000-7999 - Ferry, AC JETZ (Charters for NHL, NBA), Training, MTC Checks
Hope this helps from our little airline!
Blake K.