Icelandair made this announcement on social media:

We usually fly closer to home, near the Arctic Circle, but this flight was even cooler: Today, an Icelandair Boeing 767-300 landed at the Norwegian research station Troll in Antarctica. The charter flight is to pick up the research center’s scientists and fly them home to Norway.

The journey has involved a lot of planning due to the unique conditions (e.g. a landing strip on ice), and involves 6 pilots, 13 crew and 1 flight engineer. They’re all on their way back to the northern part of the globe, and we look forward to sharing more of their adventures in Antarctica with you next week – because snow, ice and wind are truly our elements.

Icelandair aircraft photo gallery:

Icelandair aircraft slide show:

Source: https://worldairlinenews.com/2021/02/27/icelandair-lands-in-antarctica/