My experience has been that the mileage units utilized when displaying “x miles down, y miles to go” is based upon the setting for distance units (statute or nautical miles) available in the “profile” section for registered FlightAware users. Based on mduell’s response, my presumption is that statute miles is the default for non-registered users.
Not even necessarily after the flight, since not everybody flies a perfectly straight line.
With all the wiggles in some of my flights, I wonder just how many miles I add to my course for wind correction adjustments. I’ll have to try this tomorrow with my hand held GPS and see.
I’d imagine it would be small, but add a couple miles per hundred to account for wiggles can add for some flight distance and time.
Still waaaaay shorter then following the paved roads below.