Aegean Airlines Miles&Bonus - Aegean a/c - b/w Santorini/Thira and ATH?

Just wondering what type(s) of aircraft Aegean uses between Athens and Santorini(Thira)

Most travel booking/flight timetable sites show information on aircraft types - so if you go to somewhere like www.amadeus.net you should find the information you need.

If the Aegean route I have just flown is anything to go by (ATH-HER) aircraft type may well vary depending on whether it's a peak-time flight or an off-peak one.

Amadeus is showing A320 and ARJ-100 on ATH-JTR, depending on whether it's a peak time departure or not. That's pretty much the whole variety in the A3 fleet anyway (the B737s are being phased out in favor of the A32x series).