Taxiing from and to gates from runways should be more smooth and with less fuel - using for example AI

Keep the temperature at decent levels instead of heating too much in air.

Fill up empty seats by selling affordable return trips to unknown/secret destinations. Pick the destinations among those that have low occupancy close to departure time.

Let's start by using SAF at least for domestic flights.

Implement biodegradable plastics for in-flight service items and packaging to reduce waste and promote sustainable air travel practices.

Meals included in the ticket fare are by default vegan (should be cheaper for SAS) and if meat dish is desired then it is a special order at an additional cost.