Yerz. Sitting in Casablanca going I thought to CDG. F/A in the cockpit, we happened to notice boarding passes in her hand "Orly". ??Ask her, are we going to CDG or Orly? "No idea. YOU should know!!". On the phone to ops., are we going to CDG or Orly? "Not knowing tell you later." Before start, same question, same answer. After start, ditto. Taxiing, "Tell you airborne." Finally up over the Med and about to run out of two-way with ops, ask again, "Ummm - Orly!". So there you go.