For a trip to SXM in October I just booked a round trip on JetBlue from FLL to SXM with a change of planes in SJU. All legs are on Embraer 190 aircraft. I was wondering how clearance of US customs is handled on the return trip, i.e. is it done in SJU or FLL? Are there any potential issues I should be aware of for this itinerary? Thanks in advance for any info or suggestions.
