Originally Posted by
flyingmike
I've ended up ducking out of the pre check lane and used the regular lane at IAD because it was far far shorter more than a couple of times. I was often flying out around 7:00 pm and pre check seemed stuffed with people boarding international departures just from snooping at boarding passes.
What day of the week? I routinely flew out of IAD on Fridays and it was a ghost town after 5 o'clock. In all my IAD flying I've never faced any significant wait at security.