Quote Originally Posted by Jet808 View Post
Basically the letters are fare class codes. ex. "J" represents business class. The numbers show how many seats are currently available. SA is Space Available or AKA standbys or nonrev (non-revenue) that listed or "made reservations" for that particular flight in whatever cabin class they desire. You can google fare class codes for a more thorough explanation.
thanks that's really helpful. To clarify, does Space Available (SA) refer to the seats available to a non rev's vs. available is the total number of seats available?