While walking around town yesterday we already ordered a taxi to pick us up today. Right on time we heard a car honk outside and 15 minutes later we were at the airport.
There was a long line at check-in but we soon noticed that that was for international passengers only. At the back of the airport there we two check-in desks for the domestic flights with no line, 5 minutes later we were ready to go through security. We could follow our airplane on flightradar24 as it approached Ushuaia and knew it was on time, unfortunately we had to wait for passengers and luggage from a delayed flight from Buenos Aires so we were delayed for half an hour too.
In El Calafate our car was waiting so we were soon on our way to our accommodation for one night.
We still had time after lunch for a visit to Laguna Nimez, a bird sanctuary with many native birds. We only walked part of the domain and since our tickets are valid for week we will probably go back later.