Instead of opt-out for food on the plane plane that is included in ticket, make it opt-in.

Mount small blades on the side of the wheels to make them spin by themselves before landing to reduce tyre wear upon contact with tarmac.

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

For flights with a lot of empty seats, open more award seats short time before departure.

Same amount of points earned from origin to destination regardless of amount of flights.

Encourage food suppliers and distributors to use more sustainable and healthy packaging in the food that gets served.