Originally Posted by
StratMaster
My assumption is, since there is no second security check, if you fly an intra-US segment, followed by an international segment, you can't get LLLL. But is it possible if you are arriving on an international flight, and continuing within the US? This would be the main benefit for me (if it is possible).
On a domestic to international itin, you could book them separately, and get Pre-Check, and then not have to re-clear again. Probably not worth it though