[quietbritishjim]

I don't think it should, because if I didn't fly to the other side of the world for a holiday then I wouldn't replace that journey with a drive of the same number of miles.

Besides, when people describe flying as "safer than driving", the implication is that you're more likely to end up dying one way than the other. So any measure of "deaths per x" (x is miles, hours, or whatever) needs to be followed with "typical x per lifetime".