In Plus and Business on long haul - hand out amenity kits by request instead of placing them on all seats.

Replacing the paper catalog with a QR code sticker. This saves tons of paper. Many catalogs are destroyed or unread.

Charging mobile phones or other equipment from sunlight in the sky. «Day flights are always sunny»

Make flight space available for package distributors ex. DHL for a fee. Might save their flight and truck if packages can go with regular airplanes.

Reuse condensation water on planes from ACs for use in toilets and other non-drinking water places.

Implement the potential to offset carbon footprint by CDR technologies like enhanced rock weathering;