Being the sort that I am, this lead to a spreadsheet of flights I've taken in my life. One of the implicit postulates is that I've flown to more far-off places than I've driven. At least flights are easier to validate afterwards.
I've accounted for not quite a decade's travel in the last day, yielding about two hundred thousand miles.
Along the way, I went through the stored email of ten years. Fascinating and more than a bit bizarre.
Searching for "e-ticket" and "confirmation" finds things I'd long since forgotten. Some of my travels and some assignations simply on my watch.