...I would guess that this is not used for a
flight plan. Such a plan lists different times and is used daily for a
very long time.
That's not what a flight plan is (at least not in English). A flight plan is a one-time thing. You're probably thinking of an airline flight schedule or timetable, which is completely different.
The program of a conference is a list of several
different events that happen only once, and that schedule is only used
once for one specific event.
That doesn't really match a flight plan either, though. Flight plans aren't usually detailed schedules of multiple happenings, and they usually include contingencies in the event of a destination airport being either unavailable or unreachable (due to weather or other situations). I think a flight plan might be closer to {jey} "itinerary".
-- ghunchu'wI'