Possibility to add transportation ticket to airport when buying a ticket from the Scandinavia's big cities. For example airport express train or flybus.

And give more SAS bonus points to travelers who book with biofuel. Incentives!

Make flight space available for package distributors ex. DHL for a fee. Might save their flight and truck if packages can go with regular airplanes.

Create an ability to share a seat in your car with other passengers on the flight. It's better than everyone riding their car.

Adjust flying height to reduce contrails

Abolish Plus and have just one class on domestic flights like back in the day. Use free placements onboard.