When do Olympic Air & Aegean Air post flights for April?

I am not sure when they posts schedules but do be aware that these schedules do change. I was tracking Aegean Airlines for a flight this December between Athens and Cairo which operates 5 days a week. I was expecting to book my tickets for a Tuesday flight and thankfully I waited a while. When I did go to book about 6 weeks ago I found there was no longer a flight on Tuesdays - so had to take it on a Monday. The lesson here is to be flexible and hopefully have some slack in your scheduling since you are booking so far in advance. If you are only looking for domestic Greek flights, the scenario I encountered above may not apply to your situation since I am assuming there will be multiple flight options each day.

Correction: Aegean Air will have 3 flights a day in April.

Erin - there are not "tons of flights each day" from Athens to Santorini. In fact, Olympic Air and Aegean Air each have only one flight a day.

The lack of flights for April could be related to the fact that Santorini from a tourist standpoint is still asleep. You might check a June schedule to see if the numbers change substantially. We hit the same problem in mid October when the island is shutting down for the winter. All schedules - boats, air - are substantially reduced.

Yes, I suppose "tons" was an overstatement. My understanding now is that Olympic and Aegean have 3/day in April, but Olympic has not posted theirs yet, and Aegean only has 1 posted (last I checked). Any idea how long I have to wait for them to post? I couldn't find it on their sites.

Aegean Airlines is now posting 3 flights a day Athens to Santorini for April, Olympic Air 2 flights a day