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.

Option to make a plant a tree donation. By having a partnership with a existing tree planting project.

Serve sustainably grown coffee and tea on all flights from farms that are certified as carbon offset due to their farming practices

Free reebooking to earlier flight when avilable. Result in filling up seats, and making it more likely to fill up seats on later flights

Separate the salt and pepper from the rest of the table set. Way too often it's just thrown away.

Bio fuel / green fuel as default, and having to pay more as a passenger if you want to fly on fossil based airplane fuel.