My partner wants both of us to get Global Entry before trip to South America in December. (RDU-IAH-SCL, EZE-IAH-RDU) I can't decide if it make sense to go to Charlotte, as we are in RDU or whether it would be easier to fly into a place like JFK? Is it likely or possible we could get interviews on the same day and/or time?

Not sure which wiki I should look at first. I have done some reading and have a general idea how GE works.