How many miles have you flown? If you're anything like me, (I haven't ever kept an official log) approximation is fine. Most of you probably have frequent flyer programs that keep track of your mileage.
I would venture to say that I'm between 1.5 and 2 million miles. I get this high number only because I have averaged about 60 trips per year.
It's too bad non-revs can't participate in frequent flyer programs