[Alan]

Flights to McMurdo are almost exclusively C-17s and C-130s. (Flights from McMurdo to Pole are LC-130s - that is, a ski-equipped C-130, the Hercules.)

There are exceptions: Twin Otters, Baslers, etc. - but passengers don't generally come in on those, except from field camps. Also, late last summer there was one civilian airliner - an Airbus - that was contracted to fly in and pick up a whole lot of people at once. I can't recall the story on that, but it was definitely unusual. They had stewardesses and everything.