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.

Ask gold members how much luggage they plan to bring to plan for correct weights. A lot of business travels include 3 checked bags but the majority flies with handluggage

Option to remove included luggage when booking. This will help SAS to predict load and be more efficient.

Voluntary fee of 5 cent/mile that goes to research and developement all electrical passenger airplanes. The aircompany gives another 5 cent per same miles.

Trains are sometimes faster door to door. GOT-STO takes ~3 hours to fly and 3 hours by train. CPH, MMX takes 5h by train and 3hrs by flight. Codeshare and EB-trainpoints

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.