Passed 1MM May 22, '09 on CO 1087 (MCO-IAH). Currently at 1.6MM and anticipate 2MM March 2016 at the current pace. Keep in mind that I'm a 100% domestic US traveler, with an average of ~1K miles per leg, so I've got mine "the hard way". At my age (56), I'm not confident of hitting 3 (much less 4) million, but one can dream. Or nightmare, take your pick.