I am looking at travelling from Miami to Dublin. If i book a flight on Aer Lingus with the Miami flight to O'Hare on United then the O'Hare leg to Dublin on Aer Lingus, will I need to re-clear security in Chicago? Mind you this is one ticket booked on Aer Lingus site, not two separate tickets or reservations.
What if the flight is on Delta straight through or Delta with their partner Air France or KLM?
FWIW, someone on tripadvisor says yes you have to re-clear security but I called the TSA and they say no - not as long as I do not leave the secure area, so who is right?