When going from A to D some times you need to transit in B and even C. Price match the most eco-friendly with the cheapest alternative in points.

Solar panels to generate energy

Make the app as lightweight as possible. Remove images, animations and leave only the bare necessities. This saves data transfer and storage - which in turn saves energy.

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

Reduce taxi time,(for larger aircraft) continuous climb and decent, optimized flightpaths, implement greener lounges (green electric), more points for greener choices.

Adopt single-engine taxiing to save fuel during ground operations.