Originally Posted by
ABZSimy
There may be an AA counter just after baggage reclaim and customs to re-check your luggage onto your next flight, before the landside exit. So, you may not have to take your bags all the way over to Terminal A check-in. From IAH website:
Yes there is a recheck area before exiting to international arrivals.
FYI, the underground train is incredibly odd and worth taking / seeing as a novelty. If you are pressed for time definitely take the airside train.