Include meal information as early as possible in-app.
This is good for people with allergies, so they abstain from it.

Eliminate plastic bottles by installing onboard refill stations for reusable water bottles, encouraging passengers to bring their own bottles, and reducing plastic waste.

If possible, adjust aircraft speed to reduse fuel consumtion

Use infrared heating to melt snow, ice, and frost without using chemicals

At check-in and at kiosk ask if they really need paper boarding card or can use SAS app instead.

Drop food and snack service on all domestic flights (<1 hour), only coffee, tea and water. Both plus and go