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.

Serve sustainably grown coffee and tea on all flights from farms that are certified as carbon offset due to their farming practices

Introduce zero-waste snack box for kids, with healthy snacks packaged in compostable materials. Could include fresh fruit, reusable cutlery, and info about reducing waste

Experience luxurious, eco-friendly travel by flying with sustainable fuel, earning rewards, and enjoying green packages with certified transport and hotels.

At check-in and at kiosk ask if they really need paper boarding card or can use SAS app instead.

Incentivize sustainable behavior, e.g. a small reward for bringing your own coffee cup. This can also be sold by SAS in the Eurobonus store or in flight.