i really apologize because I know the Paris Metro questions are numerous on this board, but I haven’t found the exact answers I am looking for.

I realize that most everything is covered in zones 1-2, but I am planning a day trip to Versailles (which is zone 4 I believe). Also, I will be arriving into Paris orly, staying in Montmartre, and then leaving from Orly (which is also zone 4). I am arriving on a Monday and leaving on Friday, so I don’t know which pass is best? Does anyone know the price of Carte Orange for Zones 1-4 for 5 days? I googled it but found nothing.

Also, is getting an intl student id card (not hostelling card, but just an intl student id card) worth it and if so, where exactly does it get you discounts? only museums, or other places as well?

Thanks so much. This board is my savior.