Not exactly about opening hours, but instead of starting a new thread I figured I'd post here.

I am flying from Budapest to Athens and then onwards to Moscow all on Aegean. My flight from BUD arrives at 20:30 in presumably the Schengen side, and my flight to DME leaves at 23:30 from the non-Schengen side. I'm A3*G though travelling economy, so can I access the A3 lounge in Terminal B after arrival by presenting my onward ticket and then after a few hours in the lounge there go over to Terminal A for my flight to DME? I also read somewhere that I'll have access to the Olympic lounge in Terminal A because A3 doesn't have a lounge for it's non-Schengen passengers, so if that is the case, I wouldn't mind spreading my time between the two!