Just one question - what is the average MPG for a plane versus a car?
Depends on the airplane. Example for you. My Cessna 172 uses 7.25 gallons per hour and travels without considering winds aloft 120 mph+/-. I have 38 gallons of usable fuel on board. I have calculated my flight time from AR to FL in both car and plane. The pane is better milage and obviously faster.
From my Cessna 172 days, about 17.5 mpg - maybe 140 cruise speed at 8 gph. YMMV.
YMMV - get it?
I'll go away now.