More level points to trips that are more sustainable and have less legs and layovers to promote more direct travel.

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.

Window shades down when parked at warm days. Keep the fuselage cooler. Experienced it domestic USA and it works

Use the food leftovers from each flight to make more biofuel

Change plastic luggage-trays at fast-track for sustainable (but durable) trays of reused plastic or other cyclic material

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