Looking at a possible flight MAN-DUB-JFK in a few weeks, both flights on Aer Lingus. I know about pre-clearance originating in Dublin, but what happens if you're connecting? One of the flight options (the superior one) has 55 minutes in Dublin. Last time I pre-cleared Dublin it took about an hour in line. The alternative is 6:35 in Dublin. If connecting in Dublin do you still have to pre-clear there?