Originally Posted by
Alpha Golf
No, Diamond checkpoint is gone. There is now a precheck on the main level. If you don't get that, yes, it's a total zoo -- including United checkin, even premium. Leave lots of time.
Couldn't agree more on 'leave lots of time'. That time of the day is a nightmare at IAD: crush of early evening international departures, including now lots of inexperienced travelers coming up to the holidays. Definitely be checked in with your bags by 1515. That allows for (potentially, worst case) an hour of faffing around in the security line and not arriving at the gate anxiety-riven.