Originally Posted by
RogerD408
Someone correct me if I'm wrong, but I would suspect a domestic to international flight would not qualify given you won't be screened again in between. But an international to domestic might get you TT on the domestic leg since you will be rescreened at your port of entry.
But keep in mind we are talking TSA, so just about anything can happen, even if you're a toddle in a diaper.
The whole differentiation between international and domestic is silly in and of itself. First of all, in the US they all leave from the same place; if you passed TT muster but still had nefarious intentions you could always be the one smuggling whatever contraband your partner taking the int'l flight might need, and there is nothing, as far as I know, that would keep you from booking a connecting segment on a separate PNR to connect to an int'l flight so you could potentially use PreCheck at the initial point of origin and then switch PNRs airside.