Depends whether you think it’s reasonable for fuel tax to also price in road maintenance and local pollution along the route. Airplanes don’t make potholes in the sky, and the cruising portions of their routes don’t expose anyone to any appreciable concentration of particulate, NOx, etc emissions from planes.
Taxes on fuel are a way to deincentivize the use of private cars, at least in my country with the fuel tax you can't pay all the infrastructure cars use.
