Engage travellers actively through the app: compete to save energy related to travel (pack light, public transport, direct flights) & display flight energy-consumption

Using hydrogen tanks in the rear of the plane, for example. This could work on shorter routes such as domestic flights or intra-Europe.

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.

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.

Developing a loyalty program that rewards frequent flyers with sustainability points, which can be redeemed for eco-friendly products or donated to environmental causes

Collect food waste separately, return as food for the animal farms supplying the meals, creating a true circular supply chain.