Allen writes:

He is including the tax you paid on your car to get to the airport, the tax
you paid on the gas you put in your car, the tax that went to build the road
to the airport, the tax to build the runway, the tax you paid to lengthen
the runway, the cost of your plane, the tax you paid on your plane, the cost
of your biennial, the cost of your medical, the cost of...........whoa, this
IS expensive :-)

Yes. Essentially all the costs you would not have if you didn't fly.
It all adds up.

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