This is not true. Planes fly for many reasons. Load Factor is just one of them. Maintaining slots at airports is another. Moving cargo is a third. Staging aircr

This is not true. Planes fly for many reasons. Load Factor is just one of them. Maintaining slots at airports is another. Moving cargo is a third. Staging aircraft for other, more profitable routes as well. I know it's counter intuitive, but once a route is established, flying on it reduces the co2 per passenger. Don't take it from me, take it from the carbon offset people: http://www.co2offsetresearch.org/aviation/Occupancy.html http://www.co2offsetresearch.org/aviation/Occupancy.html