Unfortunately, there are no regular direct flights from Novosibirsk to Athens. You will have to get at least one transfer in Moscow, Kiev, Istanbul, Prague, etc. Such a journey will last from 9-10 to 14 hours on average, depending on how the docking will be planned.

Even charter flights to Athens are organized with planting. Without a transfer from the Novosibirsk airport Tolmachevo can only be reached to the Greek cities of Heraklion and Thessaloniki, as well as to the island of Crete.