Yes, if you had a plane that was essentially a powered glider. Bart Rutan's Voyager that made its nonstop around-the-world flight was exactly that, and traveled about 25,000 miles on about 8300 lbs of fuel. At 6 lbs/gal, that's only 20 mpg, but they were hauling over 9000 lbs. of weight on a plane that only weighed 939 lbs empty.
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Darrell
Boycotting Exxon since 1989, BP since 2010
Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? George Carlin
Mean Green Toaster Machine
49.5 mpg avg over 53,000 miles. 176% of '08 EPA
Best flat drive 94.5 mpg for 10.1 mi
Longest tank 1033 km (642 mi) on 10.56 gal = 60.8 mpg
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