Encouraging standardized suitcase measurements and/or using AI to plan and stack luggage for saving space and even out the plane in regards to weight.

Dedicated recycling bins in galley/ head for passengers to use during non-service times

Issue extra bonus and level points to passengers who decide opt out of their included meal ahead of a flight.

I would like to see when booking every flights average flight booking. I prefer to support and book flights that are as fully booked as possible to minimize my footprint.

Create an ability to share a seat in your car with other passengers on the flight. It's better than everyone riding their car.

○○93♥Passengers can EuroBonus points by pre-booking sustainable airport transfer (train, public transport).