Eliminate plastic bottles by installing onboard refill stations for reusable water bottles, encouraging passengers to bring their own bottles, and reducing plastic waste.

A smart sustainable mobility app to enhance trips to and from airports

Find ways to allow tax-free purchases to be done in departing airport and to be picked up at the airport were I land. It could save a lot of weigh/fuel.

Allow free rebooking on the day of departure to a shorter route or a route with less stops when available, even in low booking classes and without status.

International ban on private jets. Everyone can fly commercial. With option like business and first class this should be achievable if all nations want to reduce emission

Instead of opt-out for food on the plane plane that is included in ticket, make it opt-in.