I started a job 10 years ago this month that has had me traveling 200,000 to 325,000 miles per year. So I think I'm pretty close to 3 milllion miles over those 10 years. However UA is the only airline I use that keeps track of lifetime BIS. I passed 1 million BIS on UA last year. I guess I've flown between 500,000 and 750,000 separately on LH and BA and over 500,000 on AF/KL. The rest are on a host of other airlines.