Originally Posted by
1984SW
I frequently fly in/out of MID on UA and I recall several times the pre-arrival announcement on the MID-IAH flights mentioning that passengers with baggage checked through to NH in IAH do *not* need to collect their bags in IAH. ...
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.