OK, here's the deal. My mom is booked onto a cruise that will give them a day in Punta Arenas. They can book as a shore excursion through the cruise line for that day to have a flight to Antarctica but it costs $1300 per person, which they feel is a bit outrageous.

Now I know that sometimes you can book your own shore excursion and get the same trip the cruise line would put you on for less money. Does anyone know if you can do that in this case? Google is not my friend. Apparently I don't know the super secret keywords to get this information on my own.

My undying gratitude will be yours if you know the answer to this question.