Many thanks to Colin, Paul and Gaston for your comments!
I am still experimenting here in Santiago regarding correct location and camera settings for these kind of pictures, since mountains in the background plus fences around the runways plus approaching path of airplanes are somewhat tricky to combine! I am waiting for December 21st and hoping that on this (here longest) day I can catch at least a bit of the low sun shining above the lowest mountains
. For the right picture I was using Tv, set first at 1/2000 and then progressively lowering it down to 1/1000 as the light faded away, which overall gave good results (at ISO 100, with my 70-200 f/4 lens).
Another subject to master is the correct editing of these pictures, since for me at least it seems they are much more prone to grain and these sharpening artifacts Paul is referring to around the edges of the plane. Any hints on this?