Originally Posted by tentseller

Can anyone confirm that there is international arrival to International departure (NRT ORD YYZ) baggage transfer without claiming the bags at ORD and seeing a CBP agent?

Originally Posted by WineCountryUA

The US CBP has a program at multiple US airports for those flying International-to-International (ITI) and not staying in the USA. There is limited participation at each of those airports. UA only does this at IAH (Beleive DL is only DTW, and AA? is MIA??). Beleive it is based on arriving carrier, but unsure.

Note in the process, one still must clear / declare customs / immigration just as normal but without physical dragging your checked bags thru customs

There is more discussion of ITI in this thread but very little recent information on the CBP site.