Shortly before midnight we left Zürich. Since it was close to freezing, we had to deice the plane. When we got in Buenos Aires, it was close to 30°C.
I had to look for a Bus from the airport to Buenos Aires. It's between the international and domestic terminal. Go direction to the parking lot. Tienda León runs a bus between the airport and Terminal Obelisco. From there you can catch a local bus or the subte, if you got the sube card, which was very hard to get.
For all the public transportations in Buenos Aires you need the sube card, which you precharge it. I tried to get the card in the lottery places and in the subte stations, but none of them could provide me one.
At the trainstation Retiro, was an ANSE shop, where you can get the card. It's open from 8:00 to 18:00.
You might try at the end stations of subte, if you could get the sube card there.