You have to go the LATAM site and look up their partners.

I just know that in the USA there's Delta in SkyTeam and Alaska Airlines in oneworld, but if you're based in Europe I don't know if either of those make sense for you (if you're not already a member of either).

So you should look through all of their partners and see if one of those is an airline program of which you are already a member. Or, if you're not a member of any of these airline programs, you would need to evaluate which of those airline programs would make the most sense for you to become a member based on where you are and where you fly the most.

It makes little sense to credit to an airline program where you're not likely to ever earn (and can't transfer) enough miles to get a good reward flight.