Yes, Antarctica does have an aiport but it cannot operate all year round. Teniente R. Marsh Martin airport receives direct flights from the UK/ Most people arrive by cruise ship. Although there is some civilisation at this city, it is surprisingly difficult to find any information about it or its airport.
Information about Antarctica centres on the various cruise options you might take. I think most flights are for the research stations in the region or for the military.
Yes. Did you still think scientists go to Antarctica in voyages on ships? Occasionally they do, but Antarctica has its share of airports. There are about 20 airports in Antarctica supplying to over 45 permanent research stations and 30 summer stations. Traveling to Antarctica is still a challenge as there are blizzards and tourists are allowed to visit Antarctica only during summer.
Even you can fly to Antarctica although it's expensive and there are a lot of legalities involved. Traveling to Antarctica happens between the months of November and March when Antarctica receives over 20 hours of sunlight. Also, do not expect air hostesses and other debaucheries as most of the airports are just a few people from a nearby station who’ve come to pick you up on the runways made of frozen ice.
But if you’re planning to visit Antarctica, I would recommend a ship because of the sheer excitement of seeing icebergs, penguins and breaking through ice sheets to reach ports.