Aegean Pass is the perfect solution for pre-purchasing a bulk of tickets that can be bought and booked online only. You can adjust the pass according to your needs by choosing the preferred destination(s) which can be either specific or a group, the number of flights and the number of days prior to departure you will have to book your flights (0, 7 and 30 days prior to departure for both international and domestic routes).
Also, you can benefit from the maximum Miles+Bonus Award and Ties Miles for Economy Class Flex fare, with each flight booked.