I have friends and family who do in fact fly for airlines in different countries. Through them and their network over the years I have seen how airlines operate all over Europe and Brazil.

To name just a few:

TAM, GOL, Lufthansa, TAP, Iberia, Azul, Air Berlin, and KLM.

The only thing worse at many of these airlines is that their minimum number of days off a month is only 8 to 11. But I have been told there are changes in the wind to increase the number of days off.