Terms & Conditions:
The promotional code is valid for one way and return flights, operated by AEGEAN and/or Olympic Air, and/or for flights by other collaborating airlines (codeshare flights).
Valid for bookings and flights that will take place within the next 18 months, from the date that this email was sent, only through aegeanair.com, olympicair.com and the AEGEAN app.
In order for the promotional code to be valid, it must be entered in the "promotional code" field displayed in the booking form.
In order for the promotional code to be valid, the booking must take place in the same currency in which the promotional code has been issued.
The new ticket that will be issued by redeeming the Credit Voucher, will fall under the rules of the fare class that will be issued.
The promotional code can only be used for the same passenger that the Credit Voucher was issued for, and his/her full name in the new booking must match exactly the name indicated in this email
Only one promotional code can be used in each booking and the booking must be only for one passenger.
The promotional code can be redeemed in more than one bookings/transactions. If the new booking is of lower value than the promotional code , then the difference will remain as a credit balance and the promotional code can be used in another booking . If the new booking is of higher value than the promotional code, then you will be required to pay the difference at the time of booking.
After the 12 months of the date of its issuance, and provided that the Credit Voucher has not been used in full or at all, passenger is eligible to request refund of the (remaining) unused amount paid for his initial booking.
The value of the promotional code can be redeemed for the total ticket value (fare, taxes, flight-related services purchased e.g. extra baggage, preferred seat, fast track, pet, sports equipment)
The Credit Voucher cannot be used for award tickets that will be issued with Miles+Bonus miles redemption, Business on Board points redemption, and through Bank loyalty schemes points redemption.
The Credit Voucher cannot be used in conjunction with any other promotional code. Only one promotional code can be used in each booking.
Το πρόβλημα βέβαια είναι ότι δεν βλέπω να χρησιμεύει σε κάτι σύντομα.. 
Το μόνο που βρήκα online είναι μια αναφορά του τύπου "επικοινωνήστε μαζί μας αν δεν λάβετε το voucher μέσα σε 30 μέρες" που δεν το λες και ενθαρρυντικό.
