Make a “code-share” cooperation with train providers, to allow for booking a ticket from A to B with combined train-plane modality and same benefits as connecting flight

Charging mobile phones or other equipment from sunlight in the sky. «Day flights are always sunny»

In Scandi all tap water is great. Sell SAS water bottles onboard which are made to be reused = able to buy for points, pre-order as well. And then load tap water onboard.

Turn old blankets, uniforms, seat covers into bags, carpets, pillow cases, etc. Upcycle old materials into unique collectibles to sell in the EuroBonus shop.

Eliminate single-use plastics and cardboard, use reusable porcelain, cutlery and glasses for on-board service instead.

In small airports, like Vigra, where there only 1 or 2 airplanes stand, have roofs like carports to prevent snow on plane. This will reduce amount of deicing fluid needed.