Olympic Airlines stop flying to Kalymnos

Climb Kalymnos, which just recently reported that Ryan Air will stop flying to Kos in 2017, comes with more bad news. Olympic Airlines will as of tomorrow stop flying from Athens to Kalymnos. It is said that Astra Airlines will take over but reduce to three flights a week until 2020. It seems that the best climbing destination will get even better soon as it will get less crowded but how to get there in the prime season as the charter companies mainly fly from mid May to September? Here are some low price airlines alternatives (as of 2016 but it does not fit Kos airport info): Easy Jet did fly to Kos from Milan, London and Glasgow this year; Vuelving from Rome; Air Berlin. Anyone who have some further tips how to get to Kalymnos in 2017?