Interesting fare with LOT Polish Airlines from Barcelona to
Astana, I mean Nur-Sultan, Kazakhstan. Oops, looks like its back to Astana. these flight operate via Warsaw and book into F class which earn 105% with Aegean and 100% in most Star Alliance programs. So you would earn 6590 miles or 6920 in the case of Aegean.
Astana was founded as a planned capital, in the late 1990s the capital was transferred from Almaty to Astana. Here is a Trip Report around Astana/Nur-Sultan as well as Almaty the other major city in Kazakhstan.