Something is probably being lost in translation. "Stand by" over here used to mean you bought a cheap ticket with no guarantee of actually getting on a flight, just hoping there was an empty seat. Stand by fares went away years ago. The term now means I've got a regular ticket on a later flight but I'm here now and want to go on an earlier flight.
Are you asking if there is an "airline employee discount?" I could not tell you. Best bet is to ask the tour company.