DON4IS,
I just thought that I would mention that an hour in Houston is going to be really hard to manage a connection. When we were flying back we had two hours to make our connection, so we weren't worried. However, we didn't consider the fact that you have to go through customs upon entering the United States. You have to reclaim your luggage, go through customs and recheck your luggage. This process took an hour! We barely made our connection.