Aegean Airlines 24-hour free cancellation allows you to cancel your flight tickets free of cost within the first 24 hours of making the original purchase.
You can cancel your flight tickets free of cost and get a complete refund if you do so within the first 24-hour window.
If you fail to meet the window, you can cancel your flight tickets up until 30 minutes before your scheduled Aegean Airlines flight departure.
Aegean Airlines Cancellation Policy says If you cancel before 30 minutes, you will have to pay a service charge of 20 EUR.
The amount will be debited from your payment, and the remaining will be credited as a refund.
If you cancel your flight tickets after your scheduled departure, you will not be able to get any refund from Aegean Airlines.