Qatar Airways has a Privilege Club membership subdivision for people under 30 and are currently students. I signed up with a pdf proof of enrolment at uni but I suspect it's not well monitored as it was instantaneously approved. The flight discount is pre-tax only unfortunately, but the companion deal is decent for family holidays if you've got younger ones enrolled:
"Invite three of your friends or family members to become your Student Companions, so that they can enjoy up to 20% off when you travel together."
Savings with every booking: Get 10% off when you join, 15% off after your first journey & 20% off after your second & third trips.
Enhanced flexibility: Enjoy booking options including one complimentary date change for yourself & your Student Companions.
Extra baggage allowance: Take more with you on each trip. Carry an additional 10kg or one more piece depending on your route.
Complimentary onboard Wi-Fi: Book on qatarairways.com or our mobile app to stay connected throughout your journeys with us.
Companion Pass: Share your benefits when pre-selecting family members or inviting friends to be Student Companions.
Tier upgrade: Fly at least once a year as a Student Club member & fast-track your Privilege Club tier when graduating.
Wonder if it's the same as the Entertainment book discount code: ENQR23 which also gives you up to 10%