We came to Antarctica from New Zealand on an Air Force C17 cargo jet. In many ways it was more comfortable than a commercial airline--more room. Did need to wear earplugs, though.
The flight was 5 hours, and I got to do it three times just to get here. There's a term called "boomerang." That means you get in the plane, fly for several hours, and then turn around and go back to new Zealand because the weather was too bad to land in Antarctica. I had a 5 hour boomerang, and a few days later a 10 hour one. On that one, we got all the way here and had to turn back. All together I spent 11 days on paid vacation in Christchurch, NZ between these trips. It was a very nice all expenses paid vacation, and I got a paycheck too. Life's surprises!